MOIRA. 195 



Schizaster edwardsi. 



Cotteau, 1889. Bull. Soc. Zool. France, 14, p. 341. 



Although Cotteau subsequently gave good figures and a detailed descrip- 

 tion of his specimens, there are some important matters on which more light 

 is needed before this species can be considered satisfactorily known. The 

 type specimens were from the vicinity of Cape Palmas, Liberia, in shallow water. 



Moiropsis. 



A. Agassiz, 1881. Challenger Ech., p. 205. 

 Type, Schizaster claudicans A. Agassiz, 1879. Proc. Amer. Acad., 14, p. 211. 



This is a monotypic genus which has apparently not been met with since 

 the Challenger took the specimen on which it is based, in 129 fms. in the 

 Arafura Sea. 



Moira. 



A. Agassiz, 1872. Rev. Ech., pt. 1, p. 146. 

 Type, Spatangus atropos Lamarck, 1816. Anim. s. Vert., 3, p. 32. 



Mr. Agassiz proposed Moira as a modification of Moera Michelin, 1855, 

 which was preoccupied. Michelin's removal of atropos from Schizaster left 

 S. studeri as the type of that genus (see p. 192), but if Gray's Catalogue of the 

 Recent Echinida or Sea Eggs in the collection of the British Museum were 

 really published before Michelin's paper, it is hard to see how the use of Schizaster 

 for Spatangus atropos can be avoided, since Gray's limitation of the name to 

 that species is very definite. As there seems to be some room for doubt as to 

 the exact dates of publication of the names involved, I prefer to keep Moira 

 in its customary place, especially as the name may ultimately be preserved on 

 the list of nomina conservanda. 



Nothing has hitherto been published regarding the pedicellariae of this 

 genus. I have therefore examined the material in the M. C. Z. collection with 

 some interesting results, but these do not warrant any generalizations as to 

 generic characters shown by the pedicellariae. Specific characters in the genus 

 are not well marked and the geographical range of the different forms is imper- 

 fectly known. The Siboga took four small spatangoids, referred by de Meijere 

 to Moira, near Timor in shallow water, and I may record that in 1913 the Queens- 



