354 APPENDIX. 



broad, oblong, or roundish, reddish, covered with short 

 crowded spines; of the oral surfaces with transverse rows 

 of three to five mobile spines. 



Inhab. 



This species much more nearly resembles Oudart's figures, 

 than the species I have described under the name of Nectria 

 oculifera. 



Pteraster Capensis. 



Body subpentagonal, swollen, edge very thick, rounded; 

 back convex, reticulated, with rounded groups of very small 

 ossicules at the junction of the reticulations. 



Inhab. Cape of Good Hope. 



The spines of the ambulacra like Pteraster militarise 

 but they are longer, and the series of webbed spines on their 

 outer margins are scarcely longer than those of the ambu- 

 lacra, while in the northern species they are much larger 

 and thicker, and there is no appearance of the two large 

 glassy spines at the angle of the mouth, so distinct and 

 peculiar in that species. 



