220 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



men of ingoljiana over .90 h. d., or, in other words, almost spherical ! The 

 specimens in the Mnseum of Comparative Zoology are .54— .58 h. d., while Mor- 

 tensen's table gives .61— .91 h. d. as the range for his 8 specimens; it can hardly 

 be doubted that this difference is due to the method of measurement used. In 

 the diameter of the abactinal system and the actinostome, Mortensen's figures, 

 .41-.54 h. d. for the former and .36 -.40 h. d. for the latter, accord well with the 

 measurements of the specimens in the Museum of Comparative Zoology. One 

 error in his table occurs which may be either a slip of the pen or a misprint ; the 

 specimen 28 mm. h. d. is said to have the abactinal system only 10.5 (the same as 

 the actinostome), while examination of the figure given on Plate 6 (which is appar- 

 ently that specimen) shows the abactinal system to be about 14 mm., which is 

 what would be expected. The largest specimen recorded is 35 mm. h. d. ; the 

 color is brownish, but not at all distinctive. The geographical range is from 

 Iceland to Nevis, in 165-665 fths. 



Stereocidaris microtuberculata. 



Cidaris (Stereocidaris) microtuberculata Yoshiwara, 1898, Ann. Zool. Jap., 2, pt. 2, p. 57. 



Plates 1 and 2. 



Although this species is closely allied to the following, it is easily distinguished 

 by the characters given in the key. The test and small spines are yellowish- 

 brown with a greenish tinge, and the larger secondaries have a median, longitudinal 

 stripe of a darker shade. The fully developed primaries, when clean, are white. 

 This is the biggest member of the genus, the diameter of the largest known 

 specimen being 86 mm. 



Stereocidaris grandis. 



Dorocidaris grandis Doderlein, 1885, Arch. Naturg., 51 Jhrg., 1, p. 77. 

 Stereocidaris grandis Doderlein, 1887, Jap. Seeigel, p. 42, 



Plate 1, Plate 3, figs. 1-11, Jap. Seeigel, Doderlein, 1887. Plates 33, 36, Haw. 

 Pac. Ech. Cid., A. Agassiz and Clark, 1907. 



The series of specimens at hand from Japan and Hawaii shows that this is a 

 well-characterized but somewhat variable species. The primaries are quite stout 

 (the thickness 5-7% of the length), usually deep pinkish, especially at base, 

 but often brown, gray, or green, while the test is gray, yellowish, or greenish, 

 and the secondaries yellowish or greenish, often with a broad, longitudinal green 

 stripe ; the general effect is greenish, more or less inclined towards yellowish. 

 The largest specimen in the series is 40 mm. h. d., but Doderlein's largest 

 specimen was 61 mm. Specimens o{ grandis are known not only from Japan and 

 Hawaii, but also from the Dutch East Indies (de Meijere :04). It is possible 

 that those to which de Meijere refers as having "die Halse'' "hell violet" are 

 really to be referred to the next species. 



