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



Thrissacanthias penicillatus. 



Persephonaster penicillatus Fisher, 1905. Bull. Bur. Fish., Vol. 24, p. 297. 

 Thrissacanthias penicillatus Fisher, 1910. Ann. Mag. Nat. Hist., (8) Vol. 5, 

 p. 171. 



While most of the specimens in this series are large adults, there are 

 three specimens in which R is only about 25 mm. At first sight these were 

 thought to represent another species but careful comparison with adults 

 reveals nothing distinctive. The rays are relatively shorter and wider and 

 the marginal spines and paxillse spinelets are less conspicuous. The color 

 is lighter, being nearly white. In none of the specimens examined, either 

 large or small, have I been able to find any pedicellarise, but probably 

 further search would have revealed some. No specimens of this species 

 were taken south of San Pedro, Cala. 



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°. 



Station 5697. Off Monterey County, California, 485 fms. Bottom 

 Temp., 39.8°. 



Station 5698. Off Monterey County, California,' 475 fms. Bottom 

 Temp., 39.9°. 



Station 5699. Southwest from Monterey Bay, California, 659 fms. 

 Bottom Temp., 37.9°. 



Bathymetrical range, 440-659 fms. Temperature range, 39.9°-37.9°. 



Twenty-six specimens. 



Luidia phragma. 



H. L. Clark, 1910. Bull. M. C. Z., Vol. 52, p. 329. 



There is a good series of this species, although none are very large. In 

 the largest, R = 60 mm. The series of spinelets along each side of the 

 ray, abactinally, is generally well developed, but may be incomplete and in 

 one specimen extends scarcely half the length of the ray. 



South end of Magdalena Bay, Lower California. Thirteen specimens. 



