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



Ctenodiscus crispatus. 



Asterias crispatus Retzius 1805- Diss. sp. cog. Ast., p. 17. 

 Ctenodiscus crispatus Duben and Koren, 1846. K. vet. Akad. Handl. f. 1844, 

 p. 253. 



A single small specimen (R = 15 mm.) is all the collection contains of 

 this common and widespread species. 



Station 5686. Off Ballenas Bay, west coast of Lower California, 930 

 fms. Bottom Temp., 37.3°. 



Leptychaster inermis. 



Parastropecten inermis Ludwig, 1905. Mem. M. C. Z., Vol. 32, p. 76. 

 Leptychaster inermis Fisher, 1911. Bull. U. S. Nat. Mus., No. 76, p. 53. 



The two specimens are both small, the larger being about the same size 

 as the larger of Ludwig's types (R = 18 mm.). They seem however, to 

 belong to the Panamic species rather than to the more northern anomalus 

 for there are six or seven furrow spines on each adambulacral plate and only 

 four papula? around each paxilla-base. The larger specimen answers well 

 to Ludwig's description and photographs except that the rays are relatively 

 a little shorter. The geographical range of the species is extended far 

 northward by its occurrence off California. 



Station 5685. Southwest from Ballenas Bay, west coast of Lower 

 California, 645 fms. 



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

 Bottom Temp., 37.9°. 



Astropecten erinaceus. 



Gray, 1840. Ann. Mag. Nat. Hist., Vol. 6, p. 182. 



The status of the Astropectens of the Pacific coast of America which 

 have spines on the superomarginal plates is still uncertain and probably 

 must remain so until satisfactory collections can be made on the coast of 

 Ecuador, preferably at Punta Santa Elena, whence Gray's types came. 

 Fisher follows Perrier in considering erinaceus and armatus identical but I 

 am not prepared to admit this as it seems to me more likely that armatus 

 is the species described by Verrill under the name peruviana. At the same 



