Prof. E. Forbes on Fossil Invertebrata from Southern India. 143 



A shell in form much resembling an Artemis, orbicular, depressed, and orna- 

 mented with numerous regular concentric strise. Its nearest relative is perhaps 

 the Grignon fossil named by Lamarck Lucina concentrica. 



Locality, Pondicherry. 



2. Lucina fallax, sp. nov. Pi. XVII. fig. 8. 



L. testa orbiculari, compressa, latere antico obsolete sinuato, concentrlce sulcata striataque, 

 striis longitudinalibus minutissimis ornate. 

 Length and breadth nearly 1 inch. 



The cast of this shell is smooth and polished, but exhibits traces of minute lon- 

 gitudinal strise, regular but obsolete. The muscular impressions are long and very 

 strongly marked. 



Locality, Pondicherry. 



Genus Anatina, Lamarck. 

 1. Anatina arcuata, sp. nov. PL XVI. fig. 5. 



A. testa insequilaterali, transverse lanceolata, arcuata, compressa, antice subangulata, rotun- 

 data, dilatata; postice longe rostrata, rostro truncato, bicarinato, carinis obtusis; transverse 

 sulcata striataque, sulcis concentricis regularibus subdistantibus, in carinam non productis. 



Length opposite beak li inch. Breadth 5^ inches. Greatest breadth of wide end lA inch. 

 Thickness of united valves O-^g^ inch. Length of beak 2^-^ inches. Its breadth at the extre- 

 mity O-j-^2 inch. 



A much-compressed, bent, elegantly sulcated shell, with one extremity broad 

 and rounded, except towards the cardinal margin, where it is slightly angulated ; 

 the other tapering to a narrow beak truncated at the extremity and bearing two 

 obtuse keels on its surface. The marks of the hinge-appendages cause a deep 

 curved linear impression on each valve, proceeding from the beaks. The cardinal 

 margin is rather straight. In young specimens the beaks are more tumid and the 

 shell much shorter in proportion. 



This elegant species is nearly allied to the Anatina Robinaldina described by 

 M. D'Orbigny from the Neocomian beds of France. 



Locality, Pondicherry. 



Genus Astarte, Sowerby. 



I. Astarte planissima, sp. nov. PI. XV. fig. 23. 



A. testa suborbiculari, valde compress^, concentrice sulcata striataque, sulcis distantibus, 

 regularibus, interstitiis declivis, ad marginem dorsalem subspinosis. 

 Length 0^% inch. Breadth 0^^ inch. 



Shell slightly quadrate in outline, very much depressed, ornamented with concen- 

 tric strise, filling up regular deep distant concentric furrows. Ten or eleven large 



u2 



