Vol. XXI, pp. 219-232 December 10, 1908 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW GENERA AND SPECIES OF CRINOIDS. 

 BY AUSTIN H. CLARK. 



Through the kindness of my friend Dr. Th. Mortensen, I 

 have been enabled to examine the large and exceedingly inter- 

 esting collection of recent crinoids belonging to the University 

 of Copenhagen, Denmark. Aside from its importance in 

 shedding considerable light upon the species inhabiting the 

 Indo-Paci fie- Japanese region, and showing, from the large 

 number of forms taken at a single locality (Singapore), how 

 very rich this region really is, the collection is of great interest 

 in including many specimens bearing the MS. names of Pro- 

 fessor C. F. Liitken, names which have been more or less of 

 a puzzle to students of the group, for, although many of them 

 have crept into the literature, and several of them have been 

 identified ..by Dr. P. H. Carpenter and Dr. C. Hartlaub, there 

 still remain a number which have never been identified with 

 any described species, and which were never diagnosed by 

 Professor Liitken. 



Dr. Carpenter and Dr. Hartlaub were apparently unaware 

 that any of these names had been published; but in the lists of 

 crinoids given in the catalogue of the Museum Godeffroy in 

 Hamburg most of these names occur as nomina nuda, with a 

 locality attached. Unfortunately, but few volumes of this 

 catalogue are to be found in America; I have been able to con- 

 sult Vol. IV, and part of Vol. V; Mr. \V. K. Fisher has very 

 kindly furnished me with the data from the remainder of Vol. 

 V. Dr. Mortensen wrote to Professor Pfeffer at Hamburg for 

 information in regard to the other volumes, which he courte- 

 ously supplied, so that I believe we are now correctly informed 

 as to the place of publication, and the identification, of all of 

 Professor Liitken 's nominal species. 



36— Proc. Biol. Soc. Wash., Vol. XXI, 1908. (219) 



