AGASSIZ AND CLARK: RErOET ON ECHINI. 123 



Station 4786. Between Medni and Bering, Komandorski Islands, 54 fathoms. 

 " 4787. Between Medni and Bering, Komandorski Islands, 54-57 



fathoms. 

 " 47S8. Between Medni and Bering, Komandorski Islands, 56-57 



fathoms. 

 " 4789. Between Medni and Bering, Komandorski Islands, 56 fathoms. 

 " 4790. Between Medni and Bering, Komandorski Islands, 64 fathoms. 

 " 4791. Between Medni and Bering, Komandorski Islands, 72-76 



fathoms. 

 " 4792. Between Medni and Bering, Komandorski Islands, 72 fathoms. 

 " 4794. Off east coast of Kamchatka, 58-69 fathoms. 

 " 4795. Off east coast of Kamchatka, 48-69 fathoms. 

 " 4796. Off east coast of Kamchatka, 48 fathoms. 

 " 4801. Off Simushir Island, 229 fathoms. 



4S10. Between Hakodate and Sado Island, Japan, 90-195 fathoms. 

 " 4822. Between Nanao and Tsuruga, Hondo, Japan, 130 fathoms. 

 " 49S2. Between Hakodate and Otaru, Hokkaido, Japan, 390-428 



fathoms. 

 " 4987- Between Hakodate and Otaru, Hokkaido, Japan, 59 fathoms. 

 " 4993. Between Otaru, Hokkaido, and Korsakov, Saghalin, 142 



fathoms. 

 " 4996. Between Otaru, Hokkaido, and Korsakov, Saghalin, 86 



fathoms. 

 " 5016. Off eastern coast, southern end of Saghalin, 64 fathoms. 

 " 5041. Off southern coast of Hokkaido, Japan, 61-140 fathoms. 

 " 5048. Between Hakodate and Yokohama, Japan, ] 29 fathoms. 

 " 5049. Between Hakodate and Yokohama, Japan, 182 fathoms. 

 One hundred and sixty-two specimens. 



Strongylocentrotus polyacanthus A. Ag. and Clark. 



While the specimen to which we have given this name may prove to be an aber- 

 rant example of either Drobachiensis or purpurulus, it seems best to recognize it now 

 as a distinct species. It may be distinguished by the very numerous short spines, 

 the primaries little exceeding the secondaries in either length (6-8 mm.) or thick- 

 ness ; the numerous (25) coronal plates ; and the color. The test is 73 mm. in 

 diameter and both it and the spines are dull rose-purple. The pairs of pores are 

 in oblique, but little curved, arcs of six. Each coronal plate at the ambitus 

 carries 3-5 primary, 25-35 secondary, and 50-60 miliary tubercles. 



Milne Bay, Simushir Island, Kuril Islands, Japan. 



One specimen. 



Strongylocentrotus pulchellus A. Ag. and Clark. 



Although the genital pores are large, it is doubtful whether even the larger of 

 our two specimens is adult, as it is only 17 mm. in diameter. But there can be 



