150 Bulletin American Museum of Natural History [Vol. XLVIII 



recorded, but there are 18 specimens from Station 5696. Off San Luis 

 Obispo County, California, 440 fms. Bottom temp., 39.9°. 

 Forty-four specimens. 



Nearchaster aciculosus (Fisher) 



Acantharchaster aciculosus Fisher, 1910, Zool. Anz., XXV, p. 550. 

 Nearchaster aciculosus Fisher, 1911, Ann. Mag. Nat. Hist., (8) VII, p. 92. 



These are simply five additional adult specimens from Station 5694. 

 The length of R ranges from 90 to 150 mm. 



Pseudarchaster pusillus Fisher 

 Pseudarchaster pusillus Fisher, 1905, Bull. U. S. Bur. Fish., XXIV, p. 304. 

 This is merely additional material from Station 5675. There are 18 

 specimens with R = 28 to 33 mm. 



Ceramaster leptoceramus (Fisher) 



Tosia leptocerama Fisher, 1905, Bull. U. S. Bur. Fish., XXIV, p. 306. 



Ceramaster leptoceramus Fisher, 1911, Bull. U. S. Nat. Mus., No. 76, p. 210. 



There are two additional specimens from Station 5675 with R = 35 

 to 40 mm. They seem to me more like japonicus than leptoceramus, 

 except for the presence of abactinal radial secondary plates. 



Oreaster occidentalis Verrill 



Oreaster occidentalis Verrill, 1867, Trans. Connecticut Acad. Sci., I, p. 278. 



The present large series shows great diversity in the number, 

 distribution, and acuteness of the abactinal spines and the tubercles. 

 The five radial spines near margin of disk are usually, but not always, 

 conspicuous. A perfectly preserved specimen, which seems to have re- 

 tained the living form very well, has R = 80 mm., r = 35 mm., br = 25 mm. 

 and vertical diameter of disk = 45 mm. Hence R = 2.3r, 3br, and only 

 1.3 v.d. None of the specimens give any clue as to the color in life. 

 The largest specimens have R= 105 mm. 



San Francisquito Bay, east coast of Lower California. Carman 

 Island, east coast of Lower California. 



Thirty-two specimens. 



Amphiaster insignis Verrill 

 Amphiaster insignis Verrill, 1868, Tfans. Connecticut Acad. Sci., I, p. 373. 

 There is a single small specimen, with R= only 30 mm., from Con- 

 ception Bay, east coast of Lower California. 



