85 



T. crassa, obliqua, subcompressa, utriuque paululuin 

 hiante, latere antico angulariter complanato : auriculis pos- 

 ticis magnis, anticis minoribus : costis 20 ad 24, rotundatis, 

 crassis imbricatis, area cardinali magna. 



Thick, oblique, rather compressed, slightly gaping on both 

 sides, anterior side angularly flattened : posterior auricles 

 large, anterior comparatively small ; ril)s 20 to 24, thick, 

 round, with sharp erect imbrications. The variety from the 

 Red Sea, is more oblique, and has sharper and more numerous 

 scales. lied Sea, Mediterranean. 



6. L. MULTicosTATA. (pi. xxii. f. 38) nobis. 



T. Limae squamosse simillima, sed costis circiter 35, monili- 

 formibus. 



Resembling L. squamosa, but having the ribs much more 

 numerous and less raised ; 35 were counted in the specimen 

 figured. Mediterranean ? 



7. L. PAucicosTATA (pi. xxi. f. 14. 17-) uobis. 



T. Limse squamosee simillima, sed costis circiter 1 2, squamis 

 magnis perelevatis. 



In this species there are only 12 or 13 ribs, in other 

 respects it resembles Lima squamosa, 



8. L. EXCAVATA (pi. xxi. f. 8. 9.) Chemn. 7- p- 355. t. 68. 

 f, 654. Ost. excavata Gmel. 3332. 



T. ovali, tenui, ventricosa, radiatim striata, utrinque pau- 

 lulum hiante ; latere antico subtus auriculis area excavata 

 angulata : auriculis, 230sticis magnis, anticis parvis. 



Oval, thin, ventricose, radiated by fine distant strife, slight- 

 ly gaping on both sides, with a concave elongated depression 

 in front; the anterior auricles are small, the posterior 

 large. Norway. 



9. L. FASCiATA (pi. xxi. f. 15.16.) Ost. fasciata. Lin)7. 

 Syst. Nat. p. 1147- Lima inflata. Lam. 6. p. 156. Chem. 7- 

 t. 68. fig. 649. a, b. 



T. tenui, ventricosa, oblique ovali, margine cardinali subtus 

 auriculis uniplicato ; area cardinali parva ; latere postico late 

 hiante ; antico paululum prope marginem ventralem hiante ; 

 auriculis acutis, anticis parvis, costis numerosis angularibus. 



Although obscurely described, there can be little doubt of 

 this being the true Lima fasciata of Linnaeus. A specimen now 

 exists in the Linnjean collection differing materially from the 

 one subsequently introduced by Sir J. Smith, which we 

 refer to the following species. 



10. L. VENTRICOSA. (pi. xxi. f. 6. 7-) nobis. L. 

 glaciahs PoU. 28. f. 19. 21. 



