AGASSIZ AND CLARK: RErORT ON ECHINI. 117 



ASPIDODIADEMATIDAB Duncan. 

 Aspidodiadema tonsum A. Ag. 

 Aspidodiadema tonsum, A. Agassiz, 1879. Proc. Amer. Acad., 14, p. 199. 

 The specimens taken agree more nearly with the Aspidodiademas taken by the 

 " Challenger" off Cebu, than with those {nicobaricuni) in our Hawaiian collection. 

 Station 4980. Between Kobe and Yokohama, Japan, 507 fathoms. 

 " 5078. OffOmai Saki Light, Japan, 475-514 fathoms. 

 " 5079. Off Omai Saki Light, Japan, 475-505 fathoms. 

 " 5080. Off Omai Saki Light, Japan, 505 fathoms. 

 Fifteen specimens. 



ECHINOTHURIDAE Wyville Thomson. 



Asthenosoma pellucidum A. Ag. 



Asthenosoma pellucidum A. Agassiz, 1879. Proc. Amer. Acad., 14, p. 200. 



The specimens are all small, less than 50 mm. in diameter, and their color is 

 darker than that of" Challenger" specimens, but otherwise they are not peculiar. 

 Station 4934. Off Kagoshima Gulf, Japan, 103-152 fathoms. 

 Three specimens. 



Asthenosoma Owstoni A. Ac and Clark. 



Araeosoma Owstoni Mortensen, 1904. Ann. Mag. Nat. Hist., (7) 14, p. 82, PI. 2, 



PI. 5, figs. 4-9, 11, 18-20. 



The specimens before us range in size from 20 to 150 mm., and agree well in all 

 particulars with Mortensen's description, though they show a greater diversity in 

 color. They vary from almost white (the smallest specimens) to nearly brick-red, 

 but the largest specimens are dull, pale purplish. The actiual primary spines are 

 decidedly pinkish, while those on the abactinal surface show only a very slight 

 greenish tinge. The pedicellariae agree entirely with Mortensen's figures. 

 Station 4S75. Eastern channel, Korea Strait, 59 fathoms. 

 " 4876. Eastern channel, Korea Strait, 59 fathoms. 

 " 4877. Eastern channel, Korea Strait, 59 fathoms. 

 " 4946. Between Kagoshima and Kobe, Japan, 39 fathoms. 

 " 5095. In Uraga Straits, Gulf of Tokyo, 58 fathoms. 

 Ten specimens. 



Asthenosoma tessellatum A. Ag. 



Asthenosoma tessellata A. Agassiz, 1879. Proc. Amer. Acad., 14, p. 201. 



The single specimen, 140 mm. in diameter, is somewhat damaged, but agrees 

 very well with the " Challenger " specimen, which was taken near Manila. 

 Station 4943. In Kagoshima Gulf, Japan, 119 fathoms. 

 One specimen. 



