Fig. 15. — Goniocidaris canalieulata, A, Ag. (After Sven Loven, 

 ^ Echinologica,' BiJiang till Tc. Svensk. VetensJc. Alcad. Handl. 

 vol. xviii, 1893, pt. iv, pi. tn, fig. 22.) 



TThj^e. 



m. 



-pro. 



[ [The above figure gives an inside view of the peristomal plates I, 5, & V, 

 showing half-pyramids of 5 with tooth, and the muscles {m.re, m.pro) 

 attached to the solitary peristomal 5 ; the beginnings of the epiphyses 

 (ep.) and of the rotula (ro.).] 



Fig. 16. — Side view of the buccal armature of Goniocidaris canalieulata. 

 (After Loven, op. supra cit. fig. 23.) 



[The above figure shows the raised half-pyramids beginning to enclose the 

 teeth, also the radius and rotulse.] 



