Memoirs MCZ 5407

MEMOIRS OF THE MUSEUM OF COMPARATIVE AT HARVARD COLLEGE VOL XX CAMBRIDGE, U.S.A PRINTED FOR THE MUSEUM 1807 ZOOLOGY Untversitt Press : John Wilson and Son, Cambridge, U I S A- CONTENTS THE NORTH AMERICAN CRINOIDEA CAMERATA Frank Springer Chapter I.-IX Page 1-359 By Charles Wachsmutii aud Icmoirs of i^t Hasfum of Comparalibc ^oblogg AT HARVARD COLLEGE Vol XX THE NORTH AMERICAN CRINOIDEA CAMERATA By CHAELES IN WACHSMUTH and FKANK SPRINGER TWO VOLUMES WITH EIGHTY-THREE Vol I CAMBRIDGE, U.S.A.: ^Printctj for tfjc iHuscum May, 1897 PLATES Co tl;e iHemorp LOUIS AGASSIZ, TO WHOSE INFLUENCE AS TEACHEK, EXPOirNDER, AND INVESTIGATOR, NATURAL HISTORY IN AMERICA IS SO DEEPLY INDEBTED, AND WHO FIRST INSPIRED AND ENCOURAGED US SI) is IS IN OUR EARLIER STUDIES, moxk GRATEFULLY DEDICATED BY CHAKLES WACHSMUTH FRANK SPRINGER NOTE The Manuscript of this work in bridge for publication September its present form was received at Cam- Although in press ever since then, no part of it has been published until now, and the date of the work, for bibliographic purposes, will be that which appears on the title-page During the long time that has been consumed in the printing of the plates and letter-press work since the completion of the text, many new species of Crinoids have been described by American authors, among which some of those herein mentioned as new are included, and thus anticipated No attempt has been made to cover these cases by modifying the text, nor have any questions arising upon publications appearing subsequent to the above date been considered here In a work of this size while in press changes could not be made to keep pace with current researches, and the date of delivery of the Manuscript for publication was therefore taken by the authors as final, so for as they were concerned It is a source of extreme regret that my learned colleague and long-time friend, Dr Charles Wachsmuth, 1, 1894 did not live to see the publication of this Monograph, to which he had devoted so many years of assiduous labor Never a robust or healthy man, his last few 3-ears were almost a continual struggle against disease on February 7, His strength gradually failed, and he passed away 1896, at the age of sixty -seven years Dr Wachsmuth was a native of Hanover, Germany He came to the United States in 1852, and soon after engaged in mercantile pursuits at Burlington, Iowa, which became his permanent home Failing health in time compelled him to relinquish business, and for the applied himself to the study of the Crinoids, secure outdoor exercise, and afterwards as his first life last thirty years he as a recreation and work, with all to the ardor His keen powers of observation, sagacious judgment, and indefatigable energy have left their impress upon the works which have been brought out by us While his death is a lo.ss to Science not easily of a scientific devotee repaired, witli is it whom is to none so great he had worked — with a melancholy pleasure that by the appearance of aside from his family — as in pleasant collaboration for so his last work I avail to pay to the friend many years It myself of the opportunity afforded this slight tribute to his memory FRANK SPRINGER Lm Vegas, New Mexico, 1897 CALYPTOCEINID.E Basal concavity a little 345 wider than the column, and rather deep, the basal l^lates occupying almost at the lower end, forming a sharp edge at the bottom of the dorsal cup its whole width Radials curving abruptly inward the ; exposed upper part wider than long, and nearly as large as both costals First costals once and a half as gether wider and pentangular wide as long the second a ; First distichals almost as large as the costals, the second one third smaller, and the arm-bearing palmars about half the the second distichals and pentangular though actually decagonal in outline which are as long as the first, upper parts tapering rapidly of the fourth arm of meets the two succeeding it ; plates, and near the lower end almost as wide sharp point, which to a rather the ; height rises to the two the lower end angular and barely touching the upper ; angle of the adjoining costal Compartments size First interbrachial large, subcircular Interdistichal narrower and shorter than the pieces upper interbrachials to- little ; the projecting upper end narrow and truncate arms deep for the reception of the ; the partition walls thin throughout, their width at the lower end half that of the arms, the outer faces The summit flat convex ; gradually tapering, the outer face slightly they are composed of moderately short pieces, which interlock from the fourth known closed by a small rosette of about eight pieces without Arms very additional plates With the exception plate of the construction of the of the partitions nothing Column round, disk high and cylindrical, the younger joints a little is the nodal joints narrower; axial canal pentalobate Horizon and Localifij — Niagara group Types in the American Remarhs — This might be taken Museum Waldron and Hartsville, Ind New species has such close affinities with ^ for its younger stage served that the specimens have arms not only are ; of Natural History at biserial, all ; York cr«.ss2