SOME SOUTH AFJUCAN MARINE SHELLS. O 



There are also one or two livid zones at distant intervals. 

 There are slight differences in the hinge-teeth, which it would 

 be difficult to describe,but which can be observed by comparing 

 the two forms. 



T. dunkeri, Rnmer, differs in form, the posterior end being 

 rounded and not acuminate as in the present species. 



Loripes burnupi n. sp. PI. I, figs. 14-16. 



Testa irregLilariter ovata, mediocriter convexa, subtequi- 

 lateralis, tenuis, albo-pellucida, periostraco tenui lutescente 

 partim obtecta, lineis incrementi tenuissime striata ; lunula 

 parva, pi-ofunda; umbones supra lunulam incurvati ; dens 

 cardinalis unicus valvas dextrte crassus, solidus, irregularis, 

 infra umbonem situs ; dentes duo valvae sinistree, quorum 

 posticus augustus, retrorsum incliiiatus, anterior solidus, 

 irregularis, a postico fossa lata sejunctus ; ligamentum 

 elongatum, fere internum; pagina interna obsolete radiatim 

 tenuiter striata, in fundo cicatricem angustam obliquam 

 exhibens ; cicatrix antica, mediocriter elongata, postica 

 elongato-piriformis. 



J^ong. 19"75, alt. 20, crass. 10 nnn. 



Hab. — Port Shepstone (Burnup). 



Although the ligament is not so completely internal in this 

 shell as is the case in typical forms of Loripes, I do not con- 

 sider this a sufficient difference upon which to found a distinct 

 genus since the position of the ligament is subject to con- 

 siderable variation. 



A much larger shell from the Cape Yerd Islands, described 

 by 8owerby ^ as C r y p t o d o n m u r c h 1 a n d i, externally closely 

 resembles the present species. The hinge-teeth, hoAvever, are 

 absent, or may have become obliterated with age. The form 

 of the anterior scar also is somewhat different. 



' Sowerby, G. B.. ' Proc. Maine. Soc.,' vol. vii. p. 303, pi. xxv, fig. 13. 





