THE CRINOIDS OF THE NATURAL HISTORY MUSEUM 



AT HAMBURG 



By AUSTIN H. CLARK 



ASSISTANT CURATOR, DIVISION OF MARINE INVERTEBRATES, U. S. NATIONAL MUSEUM 



PREFACE 



During the summer of 1910 1 visited Hamburg where, thanks to the 

 kindness and courtesy of Professors K. Kraepelin and G. Pfeffer, I 

 was so fortunate as to be able to study in great detail the collection 

 of crinoids preserved in the Natural History Museum. 



This collection is a large and exceedingly important one, and I 

 soon found that it would be quite impossible to do justice to it in the 

 limited time at my disposal. It was, therefore, arranged that I should 

 lay aside such specimens as were exceptionally puzzling, or called for 

 comparison with types or other specimens in the U. S. National 

 Museum, and that these would be sent to me after my return to 

 America. 



As a result of this act of generosity on the part of Professors 

 Kraepelin and Pfeffer the U. S. National Museum now possesses a 

 complete set of photographs of all the types, and other interesting 

 specimens, which are preserved in the Hamburg Museum. 



HISTORICAL ACCOUNT 



The first notice of a crinoid in the collection of the Hamburg Mu- 

 seum was Professor Sven Loven's description of the famous " recent 

 cystidean " Hypotonic sarsi, which appeared in 1868. This was soon 

 identified as the detached visceral mass of an endocyclic comatulid, 

 and later shown to belong to one of the species of the genus Zy go- 

 me tr a. 



In the preparation of the Challenger report upon the comatulids 

 Dr. Philip Herbert Carpenter visited Hamburg, and in 1882 published 

 a detailed account of the specimens he examined, describing eleven 

 new species. The new species described by Carpenter (with their 

 present determinations) are as follows : 



Smithsonian Miscellaneous Collections, Vol 60, No. 10 



