AGASSIZ AND CLARK: RErORT ON ECHINI. 125 



Temnopleurus toreumaticus Agass. 



Cidaris toreumatica Klein, 1734. Nat. Disp. Ech., p. 22, PI. 10, fig. E. 

 Temnopleurus toreumaticus Agassiz, 1841. Mon. d'Ech., Obs., p. 7. 



There is only a single specimen of this well-known species, taken at Nanao 

 Beach, Japan. 



Salmacopsis olivacea Dud. 



Salmacopsis olivacea Doderlein, 1885. Arch. f. Naturg., Jahrg., 51, Bd. 1, p. 93. 



These specimens differ from Doderlein's in their larger size and decidedly greener 

 color. The largest are over 25 mm. in diameter. 



Station 4S94. Southwest of Goto Islands, Japan, 95 fathoms. 



4937. In Kagoshitna Gulf, Japan, 58 fathoms. 

 Five specimens. 



Pleur echinus variabilis D6d. 

 Pieurechinus variabilis Doderlein, 1885. Arch. f. Naturg., 51, Bd. 1, p. 90. 

 The specimens are small (8-11 mm.) and show little diversity. 

 Station 4893. Southwest of Goto Islands, Japan, 95-106 fathoms. 

 4894. Southwest of Goto Islands, Japan, 95 fathoms. 

 " 5068. In Suruga Gulf, Japan, 77-131 fathoms. 

 Three specimens. 



Pieurechinus variegatus Mort. 



Pieurechinus variegatus Mortensen, 1904. Dan. Exp. Siam: Ech., p. 84; PI. 1, 



figs. 5, 6, 8, 19 ; PI. 2, fig. 6. 



This species is not readily distinguished from the preceding one unless at least 

 a part of an interambulacrum is cleaned, yet the banding of the primaries, and the 

 usual absence at their tips of a terminal thorn, are features of variegatus recogniz- 

 able with a good lens. The specimens before us have scarcely a trace of red on 

 the primaries, but they are not otherwise peculiar. 



Station 4893. Southwest of Goto Islands, Japan, 95-106 fathoms. 

 " 4895. Southwest of Goto Islands, Japan, 95 fathoms. 

 " 5095. Off Gulf of Tokyo, Japan, 58 fathoms. 

 Three specimens. 



Prionechinus Agassizii Wood-Mas. and Alc. 



Prionechinus Agassizii Wood-Mason and Alcoek, 1891. Ann. Mag. Nat. Hist., (6) 



8, p. 441. 



Our specimens agree so well with the description and figures of Doderlein (1906, 

 p. 194 ; PI. 24, fig. 1 ; PI. 35, fig. 7) that there can be little question of their 

 identity with his specimen. They show striking diversity in color, however, for 

 while one is pure white, a second has the test pale brown and the very base of 

 the spines tinged with olive, and the third has the tubercles and the basal half of 

 all the larger spines pale red. 



