Cleve 1901 Plank Indian Malay

KONGL SVENSKA VETENSKAPS-AKADEMIEiNS HANDLINGAR Bandet 35 N:o PLANKTON FROM THE INDIAN OCEAN AND THE MALAY AECHIPELAGO BY P T WITH COMMUNICATED TO THE R CLEVE PLATES SWEDISH ACADEMY OF SCIENCES MAY 8th 190 STOCKHOLM KUXGL BOKTnyCKEniET r A KOnSTEDT & SÖNER 1901 Tintinnids page 9, plate Xhe following paper A series route from A the result of samples of A den series is collected my exaiuination of four coUections, viz: March 1897 by the in late Dr Nyman on E the to Java of samples collected in Februarj^ and March 1899 on the same route by the late Dr C Aurivillius A considerable number of samples collected, also by Dr C Aurivillius, from May to September 1899, in the Malay Archipelago, from Billiton to Tiraor An extensive series collected by Dr R Willemsen of the Dutch Navy on the route from 45° S 22° E (end of December 1899) to 30° S 91° E (middle of January 1900) and from the last point to 2° N 94° E (beginning of February 1900) The samples procured by Dr Nyman were all small and had been collected by means of pumping water through a fiiie silk-net No observations on the tempei^ature or the salinity of the water correspond to these samples, which were examined for diatoras, dinoflagellates and tintinnodea, but not for other organisms The series obtained by Aurivillius from Aden to Java were collected by filtering water drawn from the sea Observations on the temperature were carried out and samples for determination of the salinity were taken simultaneously The very rich collection from the Malay Archipelago had been obtained by means of a tow-net This collection belongs to tlie »Riksmuseum» of Stockholm, and I take this opportunity of thanking Prof Hj Théel, who delivered the collection to me for examination ' •' ' '' ' - ''i ' '' i - ; Willemsen on board the steamer »Tromp» of the Dutch Navy, contained 37 samples, all obtained by pumping water through a silk-net Observations on the temperature of the water were carried out at the same time as the samples The collection of Dr R of plankton were taken, and, besides, water for chemical tests was bottled Willemsen my For this very beg to offer Dr The determinations of the salinity of the water have been cariied out by Professor valuable collection S O Pettersson, Although who kindly procured me the contained collections all best thanks hydrographical data a very large number of species, they cannot Väste regions remain aflbrd a complete insight into the plankton of the Indian Ocean at present unexplored and, besides, no samples have been collected in the Ocean from April to December terial for In I consider the following data merely as rudimentary ma- future generalisations following the centigrades, c Therefore coinmon, s cc for the account salinity very common I use the signs pro mille; rr t for the temperature of the water in denotes very rare, r rare, -|- not rare, Plankton-organisms from the Indian Ocean and the Malay Archipelago Pteropoda Malay Archip., conica (Esch.) (Creseis) Clio s ^ Bali Sound, May, abundant {t 25,5; 32,94) Gladocera 0£f Sumatra, 4° N Evadnc tergestina Claus 100° E March 29,35; (t 30,84) s Ostracoda Malay Archip., Gunnar Andersson) Paraconchoecia oblonga Claus var t 25,5; 32,94 (Determination s ^-'•:"' ':->^"'" ''^-.i;!.^'*- ':''' •'-Ain { obs max 29, by Copepoda I" 1.11; Malay mean Acartia erytliraea Giesbr 25,3; Archip., June r —July (t mean of 26,6, max spinicauda 28,5, Acartia May to 10° N 64° E, s 7/ 27,6, {t mean of 26,7; (t 35,7?) s Archip., r — Malay mean of 33,57, s ;.,!]•// Malay Archip., r May 33,o5, mean of obs max Malay Dana September obs max 28,35, 25,7; ii;',;'-; Giesbr 25,3; tonsa -\- of obs max 33, so, 31, si) Arahian Sea, obs max 33, ss, 33, oe) Acartia Archip., 32,52, s Acartia negligens Dana obs J Bali Sound, May, rr (3 spec), — September {t mean 26,8, of 33, so, 32,22) July, September — {t 25,6 (t 27,6, 28, 50; s 33,64 —32,43) — Malay ArcJdp., May Sept c mean of obs max 33,88, Aci'Ocalanns gibber Giesbr max 29,35, 25,3; s 32,57, Arabian Sea and Indian Ocean, 13° Acrocalanus gracilis Giesbr {t 26,9, 34,00) mean of Malay — 25,3; s obs max Archip., 33,23, ^ Appeudicularia wcre not examiued mean 28, 15, 25, 1; May to July -f-, ^