OF SOUTHERN INDIA. 385 
p. 239) and supported by Eug. Deslongchamps, the distinctions between Shismope 
and Trochotoma may hold good, but in the contrary case Deshayes’ suggestions of 
their identity must be accepted (see Journ. Conch., 1865, p. 230, etce.; ZLrochotomu 
Terquemi from the tertiary sand near Bordeaux). 
The genus Cirrus, Sow., as introduced by D’Orbigny, and other allied forms 
for which new generic names have been proposed by Ryckholt, will be mentioned 
in the next family.- 
With reference to the number of cretaceous PzzvroTomaripz I must direct 
the reader to the Catalogue in Pictet and Campiche’s Pal. Suisse, 3me. Ser. A 
few species have been subsequently described by Coquand in his work on 
the fossils of the province Constantine and of the ‘ Aptien’ of Spain, and a few 
other works. From our South Indian cretaceous deposits I have to report two 
species of Pleurotomaria (Pl. loricatula and glabella, n. sp.) and one of Leptomaria, 
(Lept. indica, Forb.). 
XCV. PLEUROTOMARITA, Defrance, 1821. 
1. PLEUROTOMARIA LORICATULA, Stoliczka, Pl. XXV, Fig. 4. 
Pleu. testa ovato-conoidea; anfractibus circiter septenis, subconvexis, fascia 
angusta supra medium sita divisis, supra fasciam spiraliter striis ternis, acutis, 
infra senis similibus, (tribus anticis tenuioribus), transversaliter supra atque infra 
fasciam costulis numerosis acutis ornatis; basi subconvexa, angustissime umbilicata, 
spiraliter striata; apertura subquadrangulari, labio crassiusculo, levi, labro ad 
basin paulo producto, luteraliter inciso, fissura quartam unius ciremtus partem 
occupante. 
Spiral angle 58° ; sutural angle about 6°. 
Height of shell : diameter of its basis (considered as 1-00) me we elelae 
" of one whorl : itswidth  ... ( 5 se ee .. 0°40. 
The shghtly convex whorls possess a very characteristic ornamentation, the 
upper portion having three and the lower six spiral strize; of the latter the three 
most anterior are thinner and closer to each other than the rest. Numerous 
sharp transverse ribs cross each whorl, being interrupted at the band, which is 
narrow and placed above the middle. The last whorl is roundish at the periphery, 
the basis slightly convex and spirally striated; umbilicus very narrow and almost 
covered by the thickened and straight inner lip. The aperture is quadrangular, 
the outer lip being at the base only slightly expanded, and the lateral fissure 
extending from the margin to about one-fourth of a circuit of a whorl. 
The only allied species is Pl. fulcata, d’Orb. (Pal. frang. erét. II, pl. 200, 
figs. 9-12) from the chloritic chalk, but is readily distinguished by the larger 
number of spiral strize and stronger transverse ribs. 
Locality—N. H. of Odium, in brownish, calcareous sandstone; apparently 
very rare. 
Formation.—Ootatoar group. 
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