\ 



307 



great ligament retuse but afterwards convex ; beaks eroded ; flexure 

 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. 



166. Tellina Columbiexsis (pi. Ixv. f. 2-i6.) Ilanlcj/, Zool. 

 Proc 1844. |b. 7/ • 



T. testa elliptica aut oblong-o-ellijitica, compressiusculii, sub- 

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

 cinerea induta; margine ventrali medio convexiusculo, utrinque 

 arcuato; dorsali utrinque convexo, autice paulo, postice satis de- 

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

 minata ; ilexura costaque unibonali subobsoletis ; hgamento 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 umbonal ridge all but obsolete ; in- 

 side white, teeth minute. 



Monte Christi, West Columbia. 



Its more compressed valves and minute teeth wall distinguish it 

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

 margin is very short and rather broad. 



167. Tellina EUFESCE^^s*(pl. Ixiii. f. 213.) Chemnitz, vol. vi. 

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

 Wood, Gen. Conch, p. 165. t. 4-2. f. 1 ; Lam. no. 13; Sow. Gen. 

 Shells ; HanL Des. Cat. p. 62. t. 4. f. 37 ; Knorr. vol.vi. 1. 12. f.l. 



T. testa oblonga, iufequivalvi, ina^quilaterali, sohda, subnitida, 

 rubro-rosea (intus saturatius fucata), subla^vigata, lineis obsoletis 

 radiantibus plerumque notata ; ahera valvula convexa, aUera com- 

 planata; margine ventraK medio subrecto, utrinque (praesertim 

 postice) sursum acchnato ; dorsah antico convexo, et vix decHvi ; 

 dorsali postico subdccUvi, propc hgamentum magnmn prominensque 

 retuso, deinde magis miniisve convexo; latere antico paululum 

 breviore, rotundato; postico attenuato obtusissime acuminato; 

 costa umbonali lata, obtusa ; flexura subobsoleta. 



Oblong, inequivalve, rather strong, scarcely glossy, ^nthin and 



