12 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VoL. 13, No. 1 
Genus Hypalocrinus A. H. Clark 
Hypalocrinus A. H. Cuarx, Proc. Biol. Soc. Washington, vol. 21, 1908, 
p. 152.—A. H. Cuark, Proc. U.S. Nat. Mus., vol. 35, 1908, p. 130. 
Diagnosis.—A genus of Pentacrinid# in which the first two post-radial 
ossicles are united by syzygy and the second is axillary; there is no further 
arm division. 
Genotype. —Pentacrinus naresianus P. H. Carpenter, 1882. 
Geographical range.—From the Kermadec Islands and Fiji to the Philip 
pines and Celebes. 
Bathymetrical range.—F rom 621 to 2468 meters. . 
Included species —H ypalocrinus naresianus (P. H. Carpenter). 
