134 On Dr. Gerard’s collection of Spiti fossils. [No. 2, 
Class. GASTEROPODA. 
16. TURRITELLA MONTIUM, n. s. Plate I. fig. 7. 
Turritella? As. Res. Vol. XVIII. Part 2, p. 114, Pl. I. fig. 12. 
S. testa crass4, conica, turrita. Spira brevi, angulo 28°. Anfracti- 
bus angulatis, medio valde bicarinatis, superne obliquis, planatis: 
ultimo ad basin depressé rotundato. Suturis valdé excavatis. Aper- 
tura circulari. 
Length of fragment, linch 9 lines. 
Total length of spire restored, 2 inches 9 ,, 
Width of last whorl, 1 inch. 
» of peristome, Sih: 
An obtuse thick-shelled species, with the upper and lower surface 
of the whorls bevelled towards the suture, ornamented with two 
spiral keels, the lower of which is the most prominent. 
The collection contains three fragments of this species, the largest 
of which is figured in the Asiatic Researches, loc. cit. and also in 
the accompanying Plate I. 
Judging from its appearance (mineral character) it is from the same 
beds as the Ceratite and Ammonites Gerardi. 
17. Pxievrotomarta, sp.? Plate IV. figs. 3, 3a. 
Some fragments of casts of a small turretted species with sub- 
angulated whorls, evidently belong to this genus. The upper surface 
of the whorls is flattened and oblique, the base convex, and marked 
on the cast with 4 equidistant ridges, the interval between the pos- 
terior ridge, and the keel being twice as great as that between the 
ridges. Aperture sub-pentangular, rounded in front. 
18. PLEUROTOMARIA, sp. ? 
A flat Solarium shaped cast, much distorted by pressure, and water- 
worn, evidently distinct from the above. 
Class. CONCHIFERA. 
19. ASTARTE MAJOR, Sowerby. 
Unio? and Trigonia? Herbert and Everest, Gleanings in Science, 
Vol. III. p. 272, Plate XVII. figs, 4a, b. 
