430 Lt.-Gol. II. II. Godwin-Austen on 



Erepta (Dupontia) levis, sp. n. (PL IX. figs. E-E 4.) 



Locality. Mauritius (E. Dupont). 



Shell (tig. E) very aepressedly globose, narrowly umbili- 

 cated, shiny, base flat ; colour pale sap-greeu ; sculpture, 

 microscopic longitudinal striation on the three first whorls, 

 becoming smooth and indistinct on the remaining ; spire 

 very low ; apex flatly rounded ; suture slightly impres>ed ; 

 whorls 4 (? adult), regularly increasing, flatly convex ; aper- 

 ture lunate, oblique ; peristome thin, columellar margin 

 weak, not reflected, oblique. 



Size : major diam. 7*25, alt. axis 275 mm. 



This species differs from the preceding, to which it is very 

 closely allied, in the less shallow suture and less flattened 

 whorls. 



The following probably belong to this subgenus : virginea, 

 Morelet, has rough longitudinal sculpture, indistinctly de- 

 cussate ; nitella, Morelet, is quite smooth and glassy, more 

 closely umbilicated and more closely wound than levis ; 

 poiveri, H. Adams — levis is nearest to this, but in poweri the 

 whorls are broader, flatter, and more openly wound. 



The animal as seen through the shell is dark-coloured, 

 finely mottled with white. The extremity of the foot 

 (fig. E 1) has an overhanging lobe ; the peripodial grooves 

 are well marked, with the fringe-like edge below wide, and 

 streaked with black. There are no shell-lobes, and the 

 dorsal lobes are simple (tig. E2). 



In the generative organs (tig. E 3) a short thick retractor 

 muscle is attached to the head of the penis-sheath ; the epi- 

 phallus is short ; the flagellum is long, slightly expanding 

 towards the free end. The spermatheca is long and narrow, 

 not bulbous. The radula formula is 26 . 4 . 8 . 1 . 8 . 4 . 26, 

 or 38 . 1 . 38. The centre tooth and admedians are plain 

 solid teeth with no side cusps and blunted points. On the 

 9th, 10th, 11th, and 12th a tooth on the outer side appears 

 and rises towards the main tooth, the laterals becoming evenly 

 bicuspid (fig. E 4). 



The jaw is nearly straight in front, with a slight central 

 projection. 



Erepta (Ctenophila) caldivelli, Benson (Barclay MSS.). 

 (PI. XL fig. 2.) 



Helix caldwelli, Bs. A. M. X. IT., Feb. 1859, p. 98; Mon. Hel. ; 



Ancey ( Ctenophila), Le Xaturaliste, vol. ii. p. G9, Jan. 1882; 



Nevifl, Nanma {Erepta ?), Hand-list, i. p. 44 (-H. paulus, Morelet). 

 Erepta and Putula sp., in noniencl. 

 Helix vinsoni, Desh. 

 Helix settling, Bs, 



