EXPLANATION OF PLATES. 

 FIG. 



344. Monoptygma elegans. (from Lea.) 



Fam. Scalariana. 



345. Vermetus lumbricalis. 



346. Bissoa reticulata. 



347. Eulima labiosa. 



348. marmorata. Bonellia, Desh. 



349. Cirrus nodosus, Sow. 



350. Euomphalus pentangulus. (from Sow. Min. Con.) 



351. Scalaria Pallassii. Aciona, Leach. 



352. Delphinula laciniata. 



Fam. Turbinacea. 



353. Solarium perspectivum. 



354. Bifrons. Bifrontia and Omalaxis, Desh. 



355. Orbis Rotella. (from Lea.) 



356. Another view of the same. 



357. Rotella vestiaria, Pitonellus, Montf. 



358. Trochus stellaris, Lam. Calcar, Montf. Turbo, Sow. 

 359. maculatus. Tectus,, Montf . 



360. agglutinans. Phorus. 



361. Pbaraonis. Clauculus, Montf. 



362. Margarita tseniata. 



363. Littorina vulgaris. 

 363*.Assiminea Grayana. 



364. Lacuna pallidula. 



365. Planaxis sulcata. 



366. Monodonta labeo ; Odontis, Sow. 



367. Phasianella variegata. 



368. Turbo setosus. Marmarostoma, Sw. 



369. Tuba striata, (from Lea.) 



370. Turritella imbricata . 



371. Monotygma, Gray. 



Fam. Canalifera. 

 372 Cerithium Aluco, front. 



305 



