OF SOUTHERN INDIA. 423 
of sharp spiral ridges, separated by broader, transversally striated furrows, are the 
characteristic distinctions of this interesting species. When the surface of the 
shell is somewhat worn off the ridges become broader and the furrows respectively 
narrower. 
Guéranger’s photogram of this species is so characteristic that I do not hesitate 
to identify our fossil with it. The form of the shell, the short plications of the 
outer lip, and the disposition of the folds are perfectly identical. The last small 
fold on the inner lip is, it is true, not traceable in Guérangev’s figure, but I have 
little doubt that it has only been obliterated by rock; besides in several of our 
own specimens this last fold is scarcely developed and always much more interiorly 
placed than any of the others. I think that Guéranger is perfectly right to 
consider this species as distinct from Av. cassis, d’Orb.; he procured bis specimen 
in the “ Gres verts” of Le Mans. Avell. inerassata, Sow., from Blackdown is very 
closely allied, but it is a somewhat less cylindrical species, the anterior fold is 
placed higher, and the spiral striation finer. 
Localities —N. and N. E. of Odium, N. E. of Shutanure, in yellowish, earthy 
and calcareous sandstone; not very common. 
Formation.—Ootatoor group. 
CIV. RINGINELLA, @Orbigny, 1842. 
1, RINGINELLA acuminata, Stoliczka, Pl. XXVII, Fig. 4. 
Ring. testa subturrita, spira longa, acuminata; anfractibus octonis, primis 
duobus levigatis, ceteris spiraliter anguste liratis, liris sulcis punctatis, umpressis 
separatis ; apertura postice acuta, subcanaliculata ; labro extus varicoso, labio crasso, 
prope medium intus valde angulato, antice insinuato atque plicis tribus obliquis, 
angustis instructo. 
Spiral angle 45°; sutural angle 8°. 
Height of spire : total of shell «. (considered as 1:00) ... vee = 074.2. 
Approximate width of shell : its height ( x haa 8) Rs ve =0'58. 
A very distinct species, characterized by its greatly produced, pointed spire, 
consisting of numerous, slightly convex volutions. The surface is marked with 
fine spiral, impressed and punctated lines; the margins of the aperture are strongly 
thickened, the outer one being, however, only partially preserved on our specimen, . 
but the inner one is very thick, sharply angular at the middle, anteriorly insinuated 
and provided with three oblique folds. 
Locality —Comarapolliam, in softish, siliceous sandstone ; very rare. 
Formation.—Arrialoor group. 
