OF SOUTHERN INDIA. 109 
three folds, the lowest of which is the strongest. As regards general form and 
character of the ornamentation, this species much resembles Plewrotoma fenestrata, 
Zek. (Gastrop. Gosaugebild. 1852, Pl. 16, Fig. 9), of which I have stated in my 
revision (Sitzungsb. Akad. Wien, LII, p. 87), that the single specimen figured by 
Zekeli does not admit of certain generic determination, the surface being quite eroded. 
and disfigured. 1 donot think it impossible, that these too may prove to be identical. 
Localities —Olapaudy, and neighbourhood of Karapaudy; the species appears 
to be rather a rare shell. 
Formation.—Arvialoor group. 
2. FASCIOLARIA RIGIDA, Baily, sp. Pl. X, Figs. 10—16. 
1855. Voluta vigida, Baily, Quar. Jour. Geol. Soc. Lond. XI, p. 459, Pl. 12, Fig. 4. 
Fasc. testa fusiformi, elongata; anfractibus numerosis, scalariformibus, postice 
valde contractis, ad marginem suturalem tumescentibus ac plus minusve crenulatis, infra 
erasse-costatis: costis ad angulum nonnunquam subtuberculatis, paulo obliquis, in 
ultimo anfractu antice obsoletis ; superficie spiraliter dense-striata : striis in excavatione 
posteriori anfractuum tenuioribus ; columella 4—5 plicata, plica anteriori crassis- 
sia, superioribus sensim tenuioribus, posticis aliquantisper fere obsoletis ; canali prope 
recto, prolongato. 
Spiral angle 45°—50°; sutural angle 10°. 
Height of last whorl : total of shell (consd. as 1:00) 560 ve 0°54—0°60. 
The shell of this species is subject to a little variation as regards the length 
of the spire, this being more or less short than the last whorl, as may be seen by a 
comparison of the several figures given on Pl. X. The spiral stricee are very numer- 
ous, coarse and nearly all of equal strength, except those below the suture on 
the excavated portion of the shell, where they are usually somewhat thinner. The 
margin along the suture is always thick, swollen up and more or less crenulated or 
even tuberculated. The transverse ribs are either very slightly bent or they are 
straight and become obsolete posteriorly on all, and anteriorly on the last, whorl. There 
are, however, not unusually cases to be met with, where the spiral striation on the 
surface of the shell is much worn off, and in such cases the transverse ribs can 
be traced extending nearly up to the suture. The outer lip is sharp, internally 
grooved; the inner lip exposes four or five oblique plaits, the posterior one or two 
bemg very fine, but not always traceable; the anterior, next to the canal, is always 
the strongest. 
Although the existence of plaits on the columella would make the identity of 
this species with Voluta cincta, Forbes, more probable, than that of Hemifusus cinctus 
n. sp. (described on p. 114) with the same, the total want of any thinner spiral strize 
between the principal ones and the elongated spire are rather opposed to this. 
The question of identity ought, however, not to be given up on this account, but it 
can scarcely be settled in any other way than by a comparison of Forbes’ origi- 
nals. Baily’s figure of Vol. rigida represents a specimen apparently with shorter 
25 
