140 Zoological Society : — 



round, which, on that side, folds well over the labrum, especially 

 below ; much covered by numerous coarse granulations, and in the 

 hollow on the labral side with four or more strong raised lamellae , 

 which are also covered with coarse granulations. 



Height 0-0/6, greatest breadth O'lOa, least breadth 0-087. 



Named in compliment to Dr. J. E. Gray, British Museum. 



Genus IV. Stoastoma, Adams. 

 Shell suhylohose. 



Stoastoma pisum. Ad. See Mon. Stoast. Adams, 1849, p. 11 ; 

 Cat. Phan. p. 228. 



Sculpture, almost obsolete, very numerous raised spiral microscopic 

 carinse, which are well defined on the upper whorls, four or five 

 being visible. Labrum, double. Labium, well detached from the 

 penult whorl. Operculum, concave and finely granulated in its con- 

 cavity. 



Uab, Manchester, generally, and near Aceompong Town, St. Eli- 

 zabeth. — Chitty, 



Stoastoma Pfeifferianum, Ad. See Mon. Stoast. Adams, p. 8; 

 Cat. Phan. p. 230. 



Labrum, double. Operculum, concave, finely granulated in its 

 concavity ; margin sharp on the labral side, rather broad, but not 

 thickened on the labial side. 



Hab. Manchester back woods. — Chitty. 



Stoastoma Livesayanum, Chitty. 



Hab. Near Ashley Hall, Trelawny. 



Form, subglobose. Colour, pale yellow. Sculpture, 11 distant, 

 blunt and raised spiral carinse, of which 5 are visible on the upper 

 whorls. Spire, conic, moderately elevated, with slightly convex out- 

 lines. Whorls, 4|rds, scarcely rounded, with a very slight suture. 

 Aperture, very slightly expanded ; semielliptical, widest in the upper 

 third of the labrum, very oblique. Labrum, pectinated by the spiral 

 carinse ; double, very slightly reflected. Labium, slightly below the 

 plane of the labrum, well detached from penult whorl, but connected 

 with it by five or six of the spiral carinas ; arcuated to the left above 

 into a sharp angle with the labrum, very much curved below to the 

 right. Umbilicus, very small and deep. Labral lamella, strongly 

 produced above, but immediately lost in the umbilicus. Operculum^ 

 semielliptical, planular, with fine granulations on the labral side, and 

 concave on the labial side, with a raised ridge all round, which is 

 much thickened and rounded, and highly raised about the lower part 

 of the labral side. 



Height 0-081, greatest breadth 0*103, least breadth 0-08. 



Named in compliment to my friend Dr. Livesay, a devoted col- 

 lector of genera. 



Stoastoma, or Electrina, succinexjm, Sowerby, will belong 

 to this group. See Cat. Phan. p. 228. 



