338 MOLLUSCA. 



According to the observations of Van Hasselt, we should place 

 here the 



ScARABiEus, Monlf. 



Which has an oval shell, the aperture narrowed by projecting 

 and stout dentations on the side next to the columella, as well as 

 towards the external margin; this margin is enlarged, and as the 

 animal renews it after each semi-whorl, the shell projects most on 

 two opposite lines, and has a compressed appearance. 



They feed on aquatic plants in the Archipelago of India(l). 



The two following genera were among the Volutae. 



Auricula, Lam. 



Differing from all the preceding aquatic Pulmonea in the columella, 

 which is marked with wide and oblique flutes. Their shell is oval 

 or oblong, the aperture elevated as in Bulimus, and the margin 

 tumid. Several are large; we are not certain whether they inhabit 

 marshes like the Lymnaei, or their borders like the Succinese. 



Auricula myosotis, Drap. Ill, 16, 17; Carychium myosotis, 

 Feruss. The only species in France; the animal has but two ten- 

 tacula and the eyes are at their base; from the shores of the 

 Mediterranean(2). 



CoNOvuLus, Lam. — Melampes, Montf. 



Projecting folds in the columella, as in the Auriculas, but the mar- 

 gin of the aperture is not tumid, and the internal lip is finely stri- 

 ated; the general form of the shell is that of a cone, of which the 

 spire forms the base. They inhabit the rivers of the Antilles(3). 



(1) Helix sear ahseus, L. 



(2) Add, Valuta auris Midse, L., Martini, II, xliii, 436 — 38; Chemn., X, cxlix, 

 1395, 1396; — Valuta auris Judx, L., Martini, II, xllv, 449 — 51; — Vol. auris Silent, 

 Born., IX, 3 — 4;— Vol. glabra, Mart., I[, xliii, 447, 448; — Vol. coffea, Chemn., 

 IX, cxxi, 1044. 



(3) Valuta minuta, L., Mart., II, xliii, f. 445, or Bulimus coniformis. Drug.; — 

 Bui. monile, Brug., Mart, lb., f. 444; — Bui. ovulus, Br., Mart., lb., 446. 



