86 



T. Limce fasciatee 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 applied to L. scabra by Gmelin. 



Mediterranean. 



11. L. rotund at a. (pi. xxi. f. 19.) nobis. 



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

 costis distantibus, moniliformibus. L. Ventricoste simili, sed 

 forma oblique rotundata, minime ovali. 



Very closely resembling Lima ventricosa, but much shorter 

 from the apex to the ventral margin ; hinge much wider, and 

 the ribs more coarse. 



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



T. tenui, striata, ventricosa, oblique ovali, 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 ; auriculis parvis acutis ; area, cardinali 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) Chemn. 

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



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

 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 Philippine 

 Islands. Found under stones at low water. 



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



