1880.J LAND-SHELLS OF MENTON. 137 



Mons. J. Rene Bourguiguat, Coombe Williams, P. Joly, P. Fagot, 

 and Colonel Godwin- Austen. 



Var. EMACiATA, nov. (Plate XIV. fig. 5.) 



This is a very difficult dwarf form, apparently varying in every 

 specimen, and of which it seems to me impossible to grasp any 

 thoroughly constant character. Taking an extreme specimen, it is 

 distinguished by its smaller size, by the more regularly turreted spire 

 being quite upright, 6 whorls, of almost equal size, slightly more 

 convex, especially the last, which is also proportionally very 

 short; aperture smaller, a trifle more vertical, and scarcely everted ; 

 callosity joining margins well developed ; peristome does not present 

 the duplex appearance of the preceding, except at the columella. 



Rare, in deposit B only. 



Long. 3i, diam. (vix) 1^ millim. 



Type var., Indian Museum, Calcutta ; also in coll. Marquis de 

 Folin and Mons. J. Rene Bourguignat. 



Var. PACHYSTOMA, nov. (Plate XIV. fig. 6.) 

 (An potiiis A. pachystoma, sp. nov. ?) 



This, unHke the preceding, is an exceeding well marked and 

 distinct form, unmistakable at a glance. I think it extremely 

 probable Mons. Bourguignat is correct in regarding it as a distinct 

 species. It can be known from the typical form by its much less 

 distinct suture, by the shorter, less elegantly and regularly turreted 

 spire, composed of only 6 more rapidly increasing whorls, the 

 apical two compressed, the others scarcely convex, almost cylin- 

 drical, especially the last, which is proportionally much longer, 

 the antepenultimate one much broader than the others (not the 

 case in type form) ; the apical portion of the spire considerably 

 more diverted from the axis of the shell, with the aperture very much 

 everted, imparting a still stronger resemblance to certain species of 

 Eulima ; the thick white peristome is surrounded by a still more 

 callous rib, especially noticeable at its termination, about the 

 middle of the columella, which is slightly oblique ; the duplex 

 character of this outer lip is still more distinctly and clearly marked. 

 This form was by no means uncommon, though much less abundant 

 than typical A. foliniana, with which it was associated. 



Long. 5, diam. \f^ milHm. 



Type var., Indian Museum, Calcutta ; also in coll. Marquis de 

 Folin and Mons. J. Rene Bourguignat. 



Renea, genus nov. 

 Hoc genus delectans ad amicum meum clarissimujii J. Rene 

 Bourguignat dedicavi; ad familiam Aciculidse, Gray, Ac- 

 mseidae, auct.) pertinet. Testa imperforata, perelongata, cylin- 

 drica, anfractibus ?iumerosis, compressis ac costulatis, labro 

 externa prope angulum superiorem {more Pleurotomorum) scis- 

 sura notabili munito ; margine peristomatis obtiiso, intus in- 

 erassato, cxtus casta callosa nulla, sicut semper in genere 



