31S 



rascente indutfi ; latere antico brcviore ; postico baud acuminato ; 

 ligameuto permagno ; natibus et umboiiibus pleniinque erosis. 



Very Hke Sobdula, but the front side is tlie shorter one, and the 

 posterior extremity is not at all acuminated. The sui'face is not 

 glossy, is usually eroded near the beaks, and covered with an ashy- 

 brown epidermis near the ventral margin, which is regularly sub- 

 arcuated. The ligament is very large and prominent. 



Arctic Ocean. 



188. Tellina Paericii (pi. lix. f. 112.) Ihmlcy ; Venus fra- 

 gihs, Otho Fair., Paun. Groen. p. 413. 



T. testa suborbiculari, soHda, sequilaterali, convexa aut subven- 

 tricosa, impolita, extus intusque albida, epidermide cinerascente 

 induta, concentrice subrugulosa; margine ventrah magis minusve 

 arcuato; dorsali utrinque convexiusculo, antici subdechvi, postice 

 decKvi; latere antico rotundato; postico vix etiam obtusissime 

 subangulato; natibus erosis; Hgamento permagno, prominente; 

 flexiu-a obsoleta ; dentibns minimis. 



Suborbicular, solid, equilateral, convex or subventricose, dull wliite, 

 covered by an ashy epidermis, concentrically wrinkled by the lines 

 of growth ; ventral margin more or less arcuated ; dorsal edges 

 moderately convex, rather sloping in front, decidedly so behind ; 

 anterior side rounded, posterior scarcely at all angulated ; beaks 

 eroded ; ligament large, and prominent ; fiexui-e obsolete ; teeth 

 very small. 



There being already a T. fragilis, I am compelled to alter the 

 orginal specific appellation of the shell. 



Northern Seas. 



189. Tellina solidula (pi. Hx. f. 109, 110.) Tultney, Cat. 

 Dorset, p. 29 ; Mont. Test. Brit. p. 63 ; Maton, Lin. Tr. 8 ; Wood, 

 Gen. Con. 193. t. 46. f. 2; Lam. no. 51 ; Hani. Des. Cat. p. 70. 

 t. 4. f. 84 ; T. zonata, D'dlw. D. Cat. p. 100 ; Psammobia soHdula, 

 Tnrtm, Biv. Brit. p. 95. t. 8. f. 2 ; T. Balthica, Flnl. En. Moll. Sic. 

 vol. i. p. 28 ; T. rubra. Da Cost. Brit. Conch. 1. 12. f. 14. 



T. testa rotundato-ovata, solida, subsequilaterali, convexa aut 

 subventricosa, magis minusve nitida, laevigata, albida, lutea, auran- 

 tia aut rosea; margine ventrali antice arcuato, postice sursmn 

 accHnato ; dorsali antice arcuato et subdeclivi, postice declivi et 

 vix convexiusculo; latere antico paululum loiigiore, rotundato; 

 postico acummato ; natibus acutis, prominentibus ; costa urabonali 

 obsoleta; ligamento magno promineute; dentibus angustissimis 

 et seepe obsoletis. 



