BULLETIN OF THE 



Teranocidaris A. Ac. 

 Unlike the other genera allied to Cidaris, the abactinal system of this 

 genus is deeply notched in the angles of the interambulacral plates. 



Temnocidaris canaliculata A. Ao. 



The spines of this species resemble those of Orthocidaris Jiystrix; they are 

 very short, hardly equal in length to the diameter of the test. Coronal 

 plates high, tubercles with a large scrobicular circle sunk below the level 

 of the miliaries. — Caroline Islands. 



Prionocidaris A. Ag. 



Prionocidaris pistillaris A. Ao. 



Syx. Cidaris pistillaris Lamk. An. s. Vert. — Zanzibar. 



Stephanocidaris A. Ac 



Stephanocidaris tubaria A. Ag. 



Syx. Cidaris tubaria Lamk. An. s. Vert. — New Holland. 



Cbondrocidaris A. Ag. 

 The whole test, with the exception of the scrobicular circle, covered with 

 very small, closely-packed granules, supporting minute spines. Spines 

 resembling those of the genus llhabdocidaris. Median ambulacral area 



convex. 



Cbondrocidaris gigantea A. Ao. 



The scrobicular circle is small, not occupying more than half the length 

 of the plate. Plates of actinal system covered with long, narrow spines. 

 Median ambulacral space containing eight rows of small tubercles, of uni- 

 form size. The primary spines are large, with a tendency of the angles 

 of the grooves to run into thin, sharp lamella;, and spread, fan-shaped, at 

 the extremity. — Sandwich Islands. 



Gonioeidaris Ao. Cut. Rais. 

 Goniocidaris geranioides Ag. Cat. Rais. — Ilobart Town. 



Astropyga Gray, Ann. Phil. 1828. 

 Astropyga radiata Cray, Ann. Phil. 1828. — Zanzibar. 

 Syx. Astropyga MossambicaFET. Seeig. v. Moss. 



Garelia Gray, Proc. ZoiH. S. Lond. 1855. — Savitjnya Des. Syn. 



Garelia subularis A. Ag. 



Syx. Astropyga subularis Ag. Cat. Pais.; EchinotJirix subularis Pet. 

 Seeig. v. Mossambique ; Savignya subularis Des. — Red Sea. 

 Garelia cincta A. Ag. 



Interambulacral space with six vertical rows of large tubercles, four ver- 

 tical rows of small tubercles in ambulacral space, which increases regularly 



