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



Genus Gryph.ea, Sowerb5^ 



1. Gryphcea stomatoidea, sp. nov. PI. XVII. fig. 15. 



G. testa inferiori ovata, transverse obsolete sulcata, in dorso excentrice turgida, umbone 

 intorto, sessili. 



Greatest length 2~^^ inches. Breadth below beak 1^^ inch. Length from keel to margin 

 ly2 inch. Height Oj^^^ inch. 



The more or less carinated turgid back, so keeled that it exhibits a long slope 

 towards the intorted beak, distinctly marks this Gryphaa, which in many respects 

 is nearly allied to the Exogyra {Gryphcea) subcarinata of Count Munster, a species 

 from the greensand of Westphalia. 



Locality, Pondicherry. 



2. Grypheea orientalis, sp. nov. PI. XIV. fig. 6. 



G. testa ovato-trigona, laevigata, haliotoidea, gibba, carinata, carina sublaterali. 

 Length 5 inches. Breadth 4 inches. Greatest height 1| inch. 



This large Grypheea closely resembles the Gryphaa sinuata and G. Icsvigata of 

 the lower greensand. It differs slightly in habit and more importantly in having 

 the widest slope from the keel on the side of the beaks, and not, as in the Euro- 

 pean species named, on the opposite side. 



Locality, Verdachellum. 



Genus Ostrea, Linnseus. 



1. Ostrea pes-leonis, sp. nov. PI. XVIII. fig. 5. 



O. testa crassa, ovata, subarcuata, irregulariter longitudinaliter radiato-sulcata, siilcis in 

 plicis fortissirais ad marginem externum mutatis, abruptis, angulatis. 

 Length 4^-^ inches. Breadth 2^ inches. Greatest height 2| inches. 



A ponderous, ovate, slightly bent shell, deeply but irregularly sulcated longitu- 

 dinally, the furrows towards the margin becoming very deep, angular, and sepa- 

 rated by very strong, high, ridgy, acutely angular plications. It closely resembles 

 the Ostrea Marshii of the English oolites, but appears to be specifically distinct. 



Locality, Pondicherry. 



2. Ostrea tegulanea, sp. nov. PI. XVIII. fig 6. 



O. testa aequivalvi, lineari-lanceolat^, arcuata, dorso sulcato, sulco l^vi, aequali ; lateribus 

 abruptis, plicis numerosis truncato-squamosis, ad dorsum abrupte prominentibus ; latere in- 

 terno dimidio expanso, plicis angustioribus arcuatis. 



Length of largest valve 3i inches. Breadth at the expanded part If inch. The specimen 

 figured was smaller, but exhibits all the proportions and characters of the shell in great per- 

 fection. 



