OF SOUTHERN INDIA. 153 
1.—Rapra ANDooRENSIS, Stoliceka. Pl. XII, Fig. 9. 
Rap. testa ultimo anfractu ventricoso, ad peripheriam bicarinato, carina superna 
fortiori, nonnunquam subtuberculata ; superficie spiraliter striata ; striis alteris trans- 
versalibus incrementi equaliter tenuibus interruptis, ultimis interdum sub-granulosis ; 
spira parum elevata ; apertura oblique quadrangulari, intus levigata; labio moderate 
calloso, antice applanato, intus subangulato; columella aperta; canali prolongato, via 
contorto ? 
The principal characteristics of this species consist in the two keels, the numer- 
ous spiral striation, increasing gradually in number according to the size and width 
of the whorls, the squarish and oblique shape of the aperture, and probably a com- 
paratively lengthened canal. There cannot be a difficulty in distinguishing well 
preserved specimens from Twudicla eximia, n. sp., but in the case of imperfect 
specimens on both sides, it is almost impossible to succeed. The inner lip is much 
thinner than in Tudicla eximia, but has no posterior fold-like tooth, and is anteriorly 
distinctly flattened and internally angular, without forming, however, a distinct fold, 
as in Tudicla. 
The strive of growth are usually well marked, and on the upper flattened por- 
tion of the whorls bent in S-form; they produce occasionally a fine granulation 
on the spiral strize, and on the upper keel even a kind of depressed tubercles. 
Locality —Andoor and Coonum, in the Trichinopoly District; very rare; one 
specimen is from Odium in the Ootatoor group, but being only a cast its determina- 
tion is somewhat doubtful. 
Formation.—Trichinopoly group. 
2.—RAPA NODIFERA, Stolizcka, Pl. XII. Figs. 10 and 11. 
R. testa ventricose-turbinata, spira brevi, anfractibus 3-4 composita; ultimo 
anfractu ad peripheriam valde angulato, noduloso, postice lente excavato, spiraliter 
striato, liris granulosis cingulato, antice canali (7?) extenso; apertura rotundate 
angulari, postice subcanaliculata, tus levigata; labro ad marginem incrassato ; 
labio tenui, antice applanato. 
This species is chiefly characterized by the strongly tuberculated keel, thin 
inner lip of the aperture, and apparently a rather more produced canal than in Rapa 
cancellata, Sow. ‘The spire is short, composed of three or four volutions, all being 
slightly excavated above, covered with spiral strice, and provided with small tubercles 
along both sutures. Below the principal keel there are one or two thinner keels or 
rather tuberculated ribs, and then again one stronger, being equivalent to the second 
keel of the former species; the rest of the shell is ornamented with spiral granulated 
strize, somewhat thinner than the sulci separating them. Towards the margin of 
the aperture the strice and tubercles mostly disappear. The posterior canal is 
distinct, the inner lip next to it somewhat thickened, but otherwise much thinner 
than in any of the other species. The excavation of the columella is partly covered, 
and the canal very narrowly open in front. 
2Q 
