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BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 



Schizaster orbignyanus A. Ag., n. sp. 



A fine specimen of this species was collected in 209 fathoms at Barbados. 

 It is closely allied to Schizaster canaliferm^ differing from it by its narrow, less 

 sunken anterior ambulacrum ; the lateral ambulacra are also narrower, the test 

 flatter, the posterior extremity more pointed, apical system more posterior, anal 

 system smaller. Peripetalous fasciole narrow, re-entering between the lateral 

 ambulacra. The fragments of the test show a primary tuberculation of the 

 actinal surface finer than in S. camUferus. The spines have the same general 

 coloring of its Mediterranean representative. 



Schizaster fragilis Agass. 

 This seems to be a not uncommon species near the 100 fathom line off our 

 New England coast. Good series in all stages of growth have been collected. 



Cambridge, December 31, 1880. 



