86 



T. Limee fasciatae simillima, sed magis ventricosa, costis dis- 

 tantibus, submoniliformibus. 



Differing from Lima fasciata in being much more ventricose, 

 and having the ribs more distant and beaded. The name 

 given by Poli was previously appUed to L. scabra by Gmehn. 



Mediterranean, 



11. L. ROTUNDATA. (pi. Xxi. f. 19.) HOhlS. 



T. Limee fasciatae simillima, sed magis recta, et ventricosa ; 

 costis distantibus, monihformibus. L. Ventricosee simili, sed 

 forma oblique rotundata, minime ovali. 



Very closely resembling Lima ventricosa, but much shorter 

 from the apex to the ventral margin ; hinge much ^vider, and 

 the ribs more coarse. 



12. L. ANGULATA (pi. xxii. f. 39, 40.) nobis. 

 T. tenui, striata, ventricosa, obhque ovah, utrinque paulu- 

 lum hiante; postice prope marginem ventralem angulata, 

 margine cardinali angustata ; auriculis parvis sub-equalibus. 



Thin, striated, ventricose, slightly gaping on both sides, 

 obliquely oval, with a posterior angle between the lateral and 

 ventral margin, hinge narrow, auricles small, nearly equal. 

 Found by Mr. Cuming at Panama and the Bay of Car- 

 racas, in sandy mud, 10 to 12 fathoms. 



13. L. LoscoMBi. (pi. xxii. f. 20, 21, 22.) Leach. Sowerby's 

 Genera. Lima, f. 4. L. bullata of Turton. 



T. tenui, ventricosa, minutissime striata, oblique ovali, 

 postice prope marginem ventralem sub-angulata, utrinque 

 vix hiante ; auricvdis par\ds acutis ; area cardinah parva. 



Thin, ventricose, obliquely oval, with the posterior ventral 



margin slightly angular, scarcely any hiatus at the sides ; 



auricles small, sharp ; area of the hinge small. Britain. 



14. L. FRAGiLis. (pi. XXII. f. 34, 35, 36, 37) C/iemn, 



7. t. 61. f. 650. L. dehiscens, Conrad. L. linguatula Lam. ? 



T. tenui, subcompressa, oblique elongata, ad latera leevi, 



in medio costis parvis distantibus, angulatis ; lateribus valide 



hiantibus ; hiatu postico costa interna marginato : auriculis 



parvis, posticis acutis, anticis obtusis ; area cardinali angusta. 



Thin, rather flat, obliquely elongated, widely gaping on 



both sides ; smooth at the sides, with the central ribs small, 



distant, and slightly angulated ; the margin of the posterior 



hiatus is formed by an internal rib ; auricles small, posterior 



acute, anterior obtuse ; hinge area narrow. The variety 



f. 37. is from Tahiti, f. 34. and 35. are from the PhiHppine 



Islands. Found under stones at low water. 



15. L. ABCUATA. (pi. xxii. f, 41, 42.) nobis. 



