307 



great ligament retuse but afterwards convex ; beaks eroded ; ftexiu'e 

 obsolete ; inside pink with a darker ray or stain on either side ; 

 primary teeth two in each valve, a simple and a bicuspidate, which 

 are alternately inserted. 

 Icy Cape. 



165. Tellina Columbiensis (pi. lxv. f. 246.) Ilanley, Zool. 

 Proc 1844. 



T. testa, elliptiea aut oblongo-elliptica, compressiuscula, sub- 

 tenui, laevigata, extus intusque albida, epidermide tenuissima fulvo- 

 cinerea. induta; margine ventrali medio convexiusculo, utrinque 

 arcuato ; dorsali utrinque convexo, antice paulo, postiee satis de- 

 chvi ; latere antico longiore, rotundato ; extremitate postica acu- 

 minata ; flexnra costaque umbonali subobsoletis ; ligainento pro- 

 minulo ; dentibus minimis. 



Elliptic or elongated-elliptic, fragile, subinequivalve, rather 

 compressed, whitish, covered by a very thin opalescent pale drab 

 epidermis, quite smooth ; ventral edge arcuated, ascending poste- 

 riorly ; anterior side much the longer, its extremity rounded and 

 somewhat attenuated, its dorsal edge convex and scarcely sloping; 

 posterior end acuminated, hinder dorsal edge at first hollowed out 

 for the slightly prominent ligament, then very convex and consi- 

 derably sloping ; flexure and uinbonal ridge all but obsolete ; in- 

 side white, teeth minute. 



Monte Christi, West Columbia. 



Its more compressed valves and minute teeth will distinguish it 

 from the few species which are allied to it in outline. The hinge- 

 margin is very short and rather broad. 



167. Tellina uufescens (pLlxiii. f. 213.) Chemnitz, vol. vi. 

 f. 97. (male); Dillw. D. Cat. p. 85; T. operculata, Gmel. 3235; 

 Wood, Gen. Conch, p. 165. t. 42. f. 1 ; Lam. no. 13 ; Sow. Gen. 

 Shells ; Hank Des. Cat. p. 62. t. 4. f. 37 ; Knorr. vol.vi. 1. 12. f'.l. 



T. testa oblonga, insequivalvi, insequilaterali, solida, subnitida, 

 rubro-rosea (intus saturatius fucata), subltevigata, lineis obsoletis 

 radiantibus plerumque notata ; altera valvula convexa, altera com- 

 planata ; margine ventrali medio subrecto, utrinque (prsesertim 

 postiee) sursum acclinato ; dorsali antico convexo, et vix declivi ; 

 dorsali postico subdeclivi, prope hgamentum magnmn prominensque 

 retuso, deincle magis minusve convexo ; latere antico paululum 

 breviore, rotundato ; postico attenuato obtusissime acuniinato ; 

 costa, umbonali lata, obtusa, ; flexura subobsoleta. 



Oblong, incquivalve, rather strong, scarcely glossy, within and 



