Vol. XXII, pp. 75-86 April 17, 1909 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW RECENT CRINOIDS FROM THE INDIAN OCEAN. 

 BY AUSTIN HOBART CLARK.* 



At the suggestion of Dr. F, A. Bather, the Indian Museum has 

 entrusted to me for study the magnificent collection of recent 

 crinoids brought together as a result of the operations of the 

 Royal Indian Marine Surveying Steamer Investigator. Covering 

 as it does the region from the Malay Peninsula to the Persian Gulf, 

 the collection is one of extraordinary interest, for by its aid the 

 westward extension of many East Indian genera can be accur- 

 ately traced, and it is possible to form a very clear concept of 

 the progressive diminution in intensity of the wonderfully rich 

 East Indian fauna as one travels westward. 



Most of the species in the collection are represented by large 

 series, and there is an astonishingly complete representation 

 of those very small forms so common in the East, which are 

 frequently disposed of in published reports as "unidentifiable 

 young," graphically bringing out the thoroughness with which 

 the collectors of the Investigator performed their labors. 



I wish to record my appreciation of the great kindness shown 

 me by Dr. F. A. Bather and Dr. N. Annandale of the Indian 

 Museum in entrusting to me a collection of such great interest 

 and importance as is that of the Investigator. 



The complete report upon this collection will be published by 

 the Indian Museum in their series of monographs dealing with 

 the Indian fauna. 



Family ZYGOMETRlDiE. 

 Genvs EUDIOCRINUS p. H. Carpenter. 



Eudiocrinus minor sp. nov. 

 Type. — Cat. No. 71B = ^Y"^ Indian Museum, from the Andaman 

 Islands. 



* Published with the permission of the Superintendent of tlie Indian Museum, 

 Calcutta. 



11— Proc. Biol. Soc. Wash., Vol. XXII, 1909. (76) 



*l 



^Jf 



