606 Appendix to Pari II 



Lam. ; it is, however, destitute of the erect lamellae which orna- 

 ment the surface of that species. 



Santa Cruz, Patagonia. 



COEBIS ? L^VIGATA. — PI. II. fig. 11. 



Corbis testa ovato-rotundatd, ventricom, Icerigatd, margine intus 

 IcBvi ; long. 3'2 ; lat. 2' ; alt. 2 - 7, poll. 



It is not without some hesitation that I have placed this in the 

 genus Corbis, although it is of the same general form as most of the 

 known species of that genus. It is quite free from external rugosity 

 or lamellae. There are two specimens, both of them so imperfect 

 that it is impossible to ascertain with certainty the character of 

 the hinge and muscular impressions. 



Navidad, Chile. 



TeLLIXIDES ? 0BL0NGA. — PI. II. fig. 12. 



Tellinidesf testa oblongd, subcsquilaterali, anterius aUiors, pos- 

 teriiLS acuminatiore, utrdgue rotundatd ; disco glabi'o, lineis 

 incrementi solummodo signato : long. 1*3 ; alt. 0*7, poll. 



This shell is very thin, and being embedded in a hard compact 

 stone, all attempts to get at the hinge have proved abortive : it is 

 therefore placed in Tellinides as the genus to which it approaches 

 most nearly in external characters. M. d'Orbigny considers it a 

 Solenella. 



Chiloe, eastern coast. 



Venus mebidioxalis. — PI. II. fig. 13. 



Venus testa ovali, plano-convexd, concentrice striata, striis acutis, 

 distantibus, sub-elevatis, interstitiis radiatim obsolete striatis ; 

 margine minutissime crenulato. 



This so closely resembles V. exalbida, Lam. in shape, as not to 

 be distinguishable, except by the radiating striae and the finely 

 crenulated margin. 



Santa Cruz, Patagonia ; and Navidad, Chile. 1 



Cythebea stjlctjlosa. — PI. II. fig. 14. 



Ciftherea testa subovatd, antics rotundatiore,postice longiore, acumi- 

 natiusculd, obtusd ; sulcis concentricis, confertiusculis, medio 



1 Wherever a fossil has been found at two localities, the name 

 first given implies that the best specimens came from that place. 



