152 MOLLUSCA FROM THE CRAG. 



p. 468,) made use of the same name, apparently without being aware of its having 

 been pre\'iously adopted by Dr. Fleming. 



Shells of this genus approach nearest in form to those of Sigaretus ; but the 

 volutions in the latter genus are more depressed, and the animal partly envelopes the 

 shell. In this genus the shell is said to be wholly external. I am not aware of any 

 species belonging to this genus of an earlier geological date than the CoraUine Crag 

 or Miocene period. 



1. Velutina l^vigata. Lxiin. Tab. XIX, fig. 8, a — b. 



Helix l.evigata. Linn. Syst. Nat. p. 1250, 1/66. 



Bulla velutina. MixU. Zool. Dan. iii, t. 101, fig. 1-4, 1773. 



Helix l.evigata. Penn. Brit. Zool. t. 86, fig. 139, 1776. 



— Turt. Linn. vol. iv, p. 540, 1806. 



— Id. Conch. Diet. p. 69, 1819. 

 Velutina vulgaris. Flem. Edin. Ency. vol. xiv, p. 626, 1820. 



— CAPULOIDEA. Blainv. Malac. p. 469, pi. 42, fig. 4, 1824. 

 Galeeiculum L.EVIGATUM. Brown. Illust. Brit. Conch, pi. 38, fig. 35, 1827. 

 Velutina laevigata. Flem. Brit. Animals, p. 326, 1828. 



— KUPICOLA. Conrad. Journ. Ac. Nat. So. vi, 266, pi. 5, fig. 17-18. 

 laevigata. Gould. Invert, of Massach. p. 241, fig. 159, 1841. 



— — S. Wood. Catalogue 1842. 



V. Testa auriformi, tenui, fragili, ovatd, ivflatd, tenuissime striata; anfractibus 

 tribus, convexis, tumidis ; suturis profundis ; aperturd valde dilatatd ; umbilico tecto. 



Shell ovate, inflated, thin, and fragile, finely striated transversely ; volutions three, 

 with a deep suture, and a large expanded aperture, subcircular ; left lip reflected, 

 covering the umbilicus. 



Axis, \ an inch nearly. 



Locality. Mam. Crag, Thorpe. Recent, British Seas. 



This shell, I beheve, is rare, perhaps from its extreme fragility. My cabinet contains 

 but one specimen, which difi'ers in some degree from the recent shell, the outer lip 

 being more elevated, the spire depressed, and the exterior smooth ; but in the recent 

 specimens the striae are scarcely visible when the epidermis is removed. Pennant 

 calls this a fresh-water shell, and Dr. Turton says "it inhabits ponds of Europe." 

 It appears to have been associated with estuary shells, though Montague says it is 

 truly marine, and generally obtained by the dredge in deep water. Dr. Gould says 

 it is found on the beach in sea weed, and also in the stomachs of fishes. S/i/aret//s 

 similis, Woodward (Geol. of Norf, t. 3, f. 8), may probably be this species ; but from 

 the figure, it is difficult to determine, as both this and the following are found at 

 Bramerton, the locality whence he obtained most of his fossils. 



