Prof. E. Forbes on Fossil Invertebrata from Southern India. 121 



Genus Pleurotomaria, Defrance. 

 1. Pleurotomaria indica, sp. nov. PI. XIII. fig. 13. 



P. test^ conica, elevata^ anfractibus 7> complanatis, in medio vix convexiusculis, spiraliter 

 sulcato-striatis ; basi plana, angulata, striata ; apertura angulata. 

 Height lj^2 inch. Breadth 1| inch. 



A pyramidal shell, with nearly flat whorls, spirally striated. The spiral sulca- 

 tions are usually arranged in pairs between two broader thread-like ridges, of 

 which there are about four on each side of the median furrow. The ridges on 

 the summits of the whorls near the suture are strongest. The base appears to 

 have been umbilicated, but the umbilicus is obscured by rock in the only specimen 

 brought home. 



In general form and details of sculpture this species approaches the Pleuroto- 

 maria gigantea of the English lower greensand, and still more nearly the Pleuroto- 

 maria Pailletiana of the neocomian beds of France. 



Locality, Pondicherry. 



2. Pleurotomaria verdachellensis, sp. nov. PI. XIV. fig. 8. 



P. test4 conica, lat{i, anfractibus 7-8, convexis, subcarinatis, spiraliter striatis, transverse 

 oblique-sulcatis ; basi marginato, margine incrassato. 

 Height 2f^2 inches. Breadth 3 inches. 



A conical but slightly depressed shell, with convex whorls, which are almost 

 carinated in the centre. They are spirally striated with rather distant striae on each 

 side of the narrow mesial furrow. The base is bounded by a thickened margin. 

 Transverse oblique wrinkles run across the whorls from either edge, and meet, 

 forming an angle at the mesial furrow. 



It is allied to several French species from the Craie chloritee. 



Locality, Verdachellum. 



Genus Nerita, Linnseus. 

 1. Nerita ornata, sp. nov. PI. XIII. fig. 5. 



N. testa subglobosa, ovata ; spir^ parva. depressissima, anfractibus tribus, ultimo superne 

 oblique undulato-sulcato, in medio granulato, inferne obsolete spiraliter sulcato ; apertura semi- 

 lunari, labro lato, l«vi. 



Diameter li inch. Height ly^„ inch. Maximum breadth of aperture 1/^ inch. 



Shell thick, subglobose, transversely ovate, with three volutions, those of the 

 spire minute. The last whorl sculptured in a remarkable manner, its uppermost 

 part being ornamented with deep-waved sulcations, which are succeeded in the 

 centre of the whorl by obscure granulations, whilst the lower portion is spirally 

 grooved, the grooves becoming obscure. The granulations of the middle part are 



