112 bulletin: museum of comparative zoology. 



Stereoeidaris microtuberculata Yosh. 



Cidaris {Stereoeidaris) microtuberculatus Yoshiwara, 1898. Ann. Zool. Jap., 2, 

 p. 67. 



There is a single specimen of this -species, which is notable for its large size. 

 The horizontal diameter measures 86 mm., which is considerably more than that 

 of any specimen of Stereoeidaris hitherto recorded. Yoshiwara's largest specimen 

 of this species measured 66 mm. As the pedicellariae have never been described, 

 it may be said here that they are very similar to those of S. leucacantha A. Ag. 

 and CI. and cannot be distinguished from them with certainty. The globiferous, 

 both large and small, are very abundant, but the tridentate seem to be very rare. 



Station 4807. Between Hakodate and Sado Island, Japan, 44-47 fathoms. 



One specimen. 



Stereoeidaris sceptriferoides Dod. 



Cidaris (Stereoeidaris) sceptriferoides Doderlein, 1887. Jap. Seeigel, p. 5, Taf . 2, 

 figs. 12-17, Taf. 8, figs. 3a-e. 



This rare species is represented by a single small specimen, which agrees well 

 witli Doderlein's description and figures, except that the secondaries are not pure 

 white but are tinged with brown, and. the test is distinctly brown. Doderlein's 

 figures of the pedicellariae, although not incorrect, do not do justice to their re- 

 markably slender form. Moreover, in many of them the valves have a conspicu- 

 ous unpaired end tooth and the opening is about one-third of the length. They 

 are thus almost identical with those Mortenseu figures as characteristic of his 

 new genus, Schizocidaris. 1903, Ingolf Exp. Ech., Pt. I, PI. 10, figs. 25 and 

 28. If that genus is to be recognized, this species must certainly be placed iu it, 

 although it is iu other respects very evidently a Stereoeidaris. 



Station 4968. Between Kobe and Yokohama, Japan, 253 fathoms. 



One specimen. 



Anomocidaris japoniea A. Ag. and Clark. 



Dorocidaris japonica Doderlein, 188-5. Arch. f. Naturg., 51, Bd. 1, p. 76. 



Cidaris (Stereoeidaris) japonica Doderlein, 1887. Jap. Seeigel, p. 6, Taf. 3, figs. 

 1-20; Taf. 8, figs, la-li. 



Cidaris (Stereoeidaris) tenuispinus Yoshiwara, 1898. Ann. Zool. Jap. 2, p. 57. 



Anomocidaris tenuispina A. Agassiz and Clark, 1907. Haw. Pacif. Ech. Cid., p. 

 30 ; PI. 11, figs. 6-12, PL 12, figs. 18-30, PI. 31, figs. 5-8. 



A large series of this interesting species was taken and we are therefore able 

 to give additional information about it. The conical form of the test shown by 

 the single specimen formerly at our disposal is not characteristic but is found to 

 a greater or less degree in several individuals, none of which, however, are fully 

 grown. The large specimens all have the rounded abactinal surface figured by 

 Doderlein for japonica and a careful comparison of Doderlein's description and 



