198 Bulletin American Museum of Natural History. [Vol. XXXII, 



Hymenaster perissonotus. 



Fisher, 1910. Ann. Mag. Nat. Hist. (8), Vol. 5, p. 170. 



Although only the smallest individual is well preserved, there is little 

 doubt as to the identity of these specimens. There are only four oral spines 

 on a plate, as a rule, and there is thus an approach to gracilis in this 

 particular, but occasionally there are five and very rarely six such spines. 

 The largest specimen has R = 40 mm.; in the smallest, it is about 30. 



Station 5689. Off Rosario Bay, west coast of Lower California, 879 fms. 



Station 5691. Off Pt. San Tomas, west coast of Lower California, 

 868 fms. Bottom Temp., 37.2°. 



Four specimens. 



Hymenaster quadrispinosus. 



Fisher, 1905. Bull. Bur. Fish., Vol. 24, p. 315. 



These specimens are poorly preserved but show the characteristics of 

 the species fairly well. R ranges from about 37 to nearly 60 mm. 



Station 5690. Off Rosario Bay, west coast of Lower California, 1101 fms. 

 Bottom Temp., 38.1°. Four specimens. 



Zoroaster evermanni. 



Fisher, 1905. Bull. Bur. Fish., Vol. 24, p. 317. 



There is an excellent series of this interesting species, which seems to be 

 common all along the coast of California between Monterey and San Diego, 

 in four to seven hundred fathoms. The largest specimens (R = 220 mm.) 

 are much larger than Fisher's type, and the coarseness of the reticulation 

 of the abactinal skeleton is very marked. But there is only a single series 

 of abactinal plates between the radial series and the superomarginals and 

 even at the extreme base of the ray, there are but three series of actino- 

 lateral plates. In the smallest specimen (R = 70 mm.), the third series of 

 these plates is to be found only just indicated by two or three plates. 



Station 5694. Southwest of Santa Cruz Island, California, 640 fms. 



Station 5695. Southwest of Santa Rosa Island, California, 534 fms. 

 Bottom Temp., 38.9°. 



Station 5696. Off San Luis Obispo County, California, 440 fms. 

 Bottom Temp., 39.9°. 



