Memoirs MCZ 4802

MEMOIRS OF THE MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE VOL XLVIII CAMBRIDGE, IPviuteiS for MASS., U S tbe /iDuseum 1919 A The Cosmos Press: Cambridge, Mass., U S A V4 /iDemotrs of tbe /iDuseum ot Comparattpe Zoologg AT HARVARD COLLEGE Vol XLVIII REPORTS ON AN EXPLORATION OFF THE ^VEST COASTS OF MEXICO, CENTRAL AND SOUTH AMERICA, AND OFF THE GALAPAGOS ISLANDS, IN CHARGE OF ALEXANDER AGASSIZ, BY THE IT S FISH COMMISSION STEAMER "ALBATROSS," DURING 1891, LIEUT COMMANDER Z L TANNER, U S N., COMMANDING XXXVIII REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE TROPICAL PACIFIC, IN CHARGE OF ALEXANDER AGASSIZ, BY THE U S, FISH COMMISSION STEAMER "ALBATROSS," FROM AUGUST, 1899, TO MARCH, 1900, COMMANDER JEFFERSON F MO.SER, U S N., COMMANDING XX REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE EASTERN TROPICAL PACIFIC, IN CHARGE OF ALEXANDER AGASSIZ, BY THE U S FISH COMMISSION STEAMER "ALBATROSS," FROM OCTOBER, 1904, TO MARCH, 1905, LIEUT.-COMMANDER L M GARRETT, U S N., COMMANDING XXXI THE ANNELIDA POLYCHAETA By RALPH V CHAMBERLIN WITH EIGHTY PLATES PLATES [Published by permission of Hugh M Smith, U CAMBRIDGE, S U Commissioner S A.: prtnteD for tbe /IDuseum July, 1919 of Fish and Fisheries] CONTENTS REPORTS and off on an Exploration the Galapagos off the Islands, in West Coasts charge of of Mexico, Central Alexander Commission Steamer "Albatross," during 1891, U S N., Commanding XXXVIII Lieut Reports on the tion to the Tropical Pacific, in charge of Alexander Agassiz, by the U S Fish Commander S N., Commanding XX Z L Tanner, Scientific Results of the Expedi- Agassiz, by the U S Fish mission Steamer "Albatross," from August, 1S99, to March, 1900, son F MosER, U and South America, Reports on the Com- Commander JefferScientific Results of the Expedition to the Eastern Tropical Pacific, in charge of Alex-^nder Agassiz, by the U S Fish Commission Steamer "Albatross," from Octoljer, 1904, to March, 1905, M Garrett, IT S N., Commanding XXXI The Annelida By Ralph V Chamberlin 514 pp SO plates July, 1919 Lieut -Commander L PoLYCHAETA EXPLANATION OF THE PLATES PLATE PLATE Harmothoe mexicana Chambeklin Figures 1-9 — median tentacle broken end, dorsal view X27 — Twenty second right parapodium, caudal view X 3.— eh-tron X — Small portion same X — Neuropodial common form X — Neuropodial second form X — Small common form, viewed from edge portion neuropodial — The same, viewed from X 1073 — Notopodial view X portion, (style of ^^nterior off; 18 21 First of 5.- seta, seta, of 187 eljrtron 108 108 seta, side tentacular seta, distal side 63 X 1073 cirri in outline) PI^TE 77 PLATE 77 Amphicteis orphnius Chajiberlin Figures 1, — Two of the shorter paleae from above X 67 — Uncuius, seventeenth setigerous somite X 930 Amphicteis obscurior Chambeblin Figure X 3.— Uncinus 930 Amphicteis uncopalea Chambeelin Figure — Uncinus from twelfth somite X 930 Pabits deroderus Chamberun Figui'es 5, 6 — Abdominal X uncinus, profile view X 278 — Distal end of thoracic seta 1075 Ampharete homa Chamberlin Figures — Abdominal uncinus X 1075 — Distal end notopodial thoracic of X seta 7, 278 Paiwa abyssi Chamberlin Figures 10 — Ninth parapodimn, ventrolateral — Uncinus, view X 1075 view X 9, 10 25 profile Moyanus explorans Chamberlin Figures 11, 12 11 — Thoracic 12.— uncinus, profile view Distal portion of thoracic seta X X 1075 278 Sabellides delus Ch.\mberlin Figure 13 13 — Uncinus from eleventli setigerous somite X 1075 Mem Mils Comp Zool "Albatross MELIOTVPE CO BOSTON " Polvchaeta, Plate 7; PLATE 78 PLATE 78 Paumotella takemoana CHAirsERLiN Figui'es 1-5 — Dorsal abdominal seta from caudal X 260 region — Setae sixth thoracic somite, ends X 278 — Abdominal uncinus X 1036 — Dorsal alidominal median region abdomen — Portion branchia optical section X of distal - of seta, of in X 260 58 Pomatoceros paumotanus Chamberlin Figures 6-9 — Portion thoracic — Thoracic uncinus X 1036 — Lateral view operculum — Tip a branchia X of seta, tip of of broken X off X 278 15 63 Stemaspis maior Chamberlin Figure 10 10.— Ventral shield X 3.75 Mem Mim Comp Zool ••Albatross" Polvchaeta, Plate yS •\ JO 'I PLATE 79 PLATP: 79 Eupolymnia regnans Chamberlin Figures 1-3 1.— Thoracic 2.— Thoracic seta X 225 X uncinus — Abdominal uncinus 830 X 830 Eupolymnia insulana Chamberlin Figures 4-6 4.— Thoracic seta X 225 — Thoracic uncinus X 860 — Abdominal uncinus X 860 Terebella panamena Chamberlin Figures — Distal portion thoracic — Thoracic uncinus X 830 of seta X 7, 830 Nicolea profundi Chamberlin Figure 9.— Thoracic uncinus X 830 Nicolea latens Chamberlin Figures 10, 11 10 11 — Notopodial seta, distal portion — Abdommal uncinus X 860 X 225 Nicolea taboguillae Chamberlin Figures 12, 13 12 13 — Outline — Thoracic of right lateral flap of third somite uncinus, profile view X 830 X 20 Mem Mils Comp Zool •Albatross" Polvchaeta, Plate 79 / \._ \ 10 ~A 12 I \ MEKOTVPE CO BOSTON '\ PLATE 80 PLATE 80 Nicolea galapagensis Chamberlin Figures 1-3 — Caudal end, dorsal view X — Outline third somite — Thoracic uncinus X 860 20 of right lateral flap of X 20 Thelepus pericensis Chamberlin Figures 4-6 — Anterior X 225 portion — Anterior uncinus, frontal view X 860 6.— The seta, distal same, profile X 860 Terebellides eurystethus Chamberlin Figures 7-15 — Pinnula anterior abdominal region X — Pinnula posterior abdominal region X — Foiu-teenth notopodium, anterior view X — Seta tenth thoracic somite, extreme missing X 225 — Thoracic uncinus X 860 — Abdominal imcinus, view X 860 13.— Abdominal uncinus, frontal view X 860 — Another abdominal uncinus X 860 — Crown teeth uncinus viewed nearly from direction points of of 51 22 left 10 51 of tip II 12 profile 14 15 of of of of teeth X 860 Mt'in Mn> Conii") /ool •Albatross" Polvchacta Plate So 75 fiM HEllOTVPE CO BOSTON