CLARK: JAPANESE AND EAST INDIAN ECHINODERMS. 305 



Salmacis sphaeroides. 



Echinus sphaeroides Linne', 1758. Sys. Nat., ed. 10, p. 664. 

 Salmacis sphaeroides Loven, 1887. Ech. Linn., p. 69. 



2 specimens, 55 and 63 mm. in diameter. Amboina. Barbour collection. 



Mespilia globulus. 



Echinus globulus Linne, 1758. Sys. Nat., ed. 10, p. 664. 



Mespilia globulus Agassiz & Desor, 1846. Ann. Sci. Nat., 6, p. 358. 



5 specimens, about 20 mm. in diameter. Yenoshima, Sagami Bay, Japan. — 

 1 specimen, 27 mm. in diameter. Aburatsubo, Sagami Bay, Japan. Owston 

 collection. 



In the specimen from Aburatsubo the spines are very bright red, in striking 

 contrast to the dark green, bare interambulacral spaces, but in the specimens 

 from Yenoshima the colors are more yellowish and not nearly so bright. 



Salmacopsis olivacea. 

 Doderlein, 1885. Arch. f. Naturg., 51 (1), p. 93. 



3 specimens, about 18 mm. in diameter. Sagami Bay (33° 9' N. x 13S° 42' 

 E.), Japan, 30-40 fathoms. — 2 specimens, about 20 mm. in diameter. Uraga 

 Channel, Gulf of Tokyo, Japan, 40 fathoms. — 1 specimen, 24 mm. in diameter. 

 Uraga Channel, Gulf of Tokyo, Japan, 20-30 fathoms. — 1 specimen, 14 mm. in 

 diameter. Aburatsubo, Sagami Bay, Japan. Owston collection. 



The specimen from Aburatsubo is remarkable for the very bright green color of 

 the interambulacra, contrasting sharply with the white ambulacra. The others 

 are all olive-brown with more or less evident traces of greenish but with little 

 contrast between interambulacra and ambulacra ; the genital and ocular plates are 

 blackish. 



Prionechinus agassizii. 

 Wood-Mason & Alcock, 1891. Ann. Mag. Nat. Hist., (6) 8, p. 441. 



2 specimens, 4.5 and 9 mm. in diameter. Nearly white but with a pink tinge. 

 Sagami Bay (35° 32' 14" N. x 139° 31' E.), Japan, 400 fathoms. Owston 

 collection. 



Toxopneustes pileolus. 



Echinus pileolus Lamarck, 1816. Anim. s. Vert., 3, p. 45. 



Toxopneustes pileolus Agassiz, 1841. Mon. d'Ech., Obs. Prog. Rec. Hist. Nat. 

 Ech., p. 7. 



4 specimens, 62-114 mm. in diameter. Sagami Bay (35° 2' N. x 13S° 52' E.), 

 Japan. Owston collection. 



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