421 



prickles. The interstices are smooth. In the collection of Mr. 

 Gruner, Bremen. Locality unknown. 



9. Spondylus tenuispinosus (pi. lxxxvii. f. 37.), nobis. 



S. testa ovali, tenui ; costis principalibus 8 ; spinis elongatis, 

 tenuis, erectis, numerosis ; spinis interstitialibus minute" spinosis, 

 interstitiis minute imbricatis ; laminis valvse inferiori elegantissime 

 foliaceis ; colore pallide cinereo, prope umbonem rubro variegato, 

 valva. inferiori alba, prope umbonem flavida, rubro radiata. 



The only specimens of this elegant shell are in the collection of 

 Mr. Cuming. The species is distinguished by the thin, sharp, erect 

 white spines, which ornament the numerous ribs. The upper valves 

 are of a pale ashy colour, variegated with red near the umbo, and 

 the under valve is white with beautifully foliated laminae, and a 

 few graceful spines. 



Isle of Zebu, Philippines ; Cuming. 



10. Spondylus asperrimus (pi. lxxxvii. f. 88.), Sow., Jun., 

 Proc. Zool. Soc, May, 1847. 



S. testa subrotundata ; costis numerosis vix elevatis, subequa- 

 libus ; aculeis brevibus, erectis, creberrimis, subtus canaliculatis ; 

 interstitiis scabriusculis et spinosis ; colore valvse superiori fusco, 

 prope umbonem variegato, valvse inferiori croceo. 



This shell is remarkable for the numerous, nearly equal ribs, 

 which are armed with very short, erect, equidistant spines. The 

 shell is in Mr. Cuming's collection. 



11. Spondylus spathuliferus (pi. lxxxvi. f. 26. pi. lxxxix. 

 f. 61.), Lam. anim. s. vert. vol. vi. (synom. exclus.), var. purpurea, 

 S. violaceus, Lam. 



S. testa ovali ventricosa, costis principalibus 6 validis ; squamis 

 distantibus, ad basin angustibus, ad terminos arcuatis, palmatis, 

 subdivisis, subtus sulcatis ; interstitiis quinque-sulcatis, sulcis im- 

 bricatis, spinis parvis, vel squamis, ornatis; colore purpureo, vel 

 rubro, vel fusco, plerumque subtus croceo tincto, prope umbones 

 rubro variegato. Variat squamis flavidis. 



The scales of the six principal ribs are narrow and erect at the 

 base, and at the termination slightly arched, flattened, and pal- 

 mated. They are few in number, and the interstitial ribs gene- 

 rally have a few smaller and more pointed scales. The colour, 

 whether brown or purple, is generally dark, and uniform, present- 

 ing a well-defined border in the interior. The umbones are varie- 

 gated with red, and the under side of the shell is generally more 

 or less tinged with saffron. The figure in Plate lxxxix may be 



