Prof. E. Forbes on Fossil Invertebrata from Southern India. 139 



The Terehratula alhensis of Leymerie, from the chalk of France, closely resem- 

 bles this species in form, but has not the concentric sulcations. 

 Locality, Pondicherry. 



2. In the Verdachellum collection there is a fragment of a plicated Terehratula 

 evidently nearly allied to some greensand species. 



Acephala Lamellibranchiata. , 



Genus Clavagella, Lamarck. 

 1. Clavagella semisulcata, sp. nov. PI. XVII. fig. 1. 



C. valvulis ovatis, depressis, inaequilateralibus, prope umbones obsolete sulcatis striatisque. 

 Tubo recto, extremitate conchifera magna, clavata, tuberculata. 

 Breadth of a valve Of inch. Length 0^ inch. 



Valves large, ovate, with the beaks near one end, ends rounded ; one half the 

 surface, that nearest the beaks, marked with transverse furrows and striae. The 

 surface of the investing tube is rugose and tuberculated in front of the shell. The 

 tube is cylindrical, smooth, and very much smaller than its clavate extremity. 



The Clavagella cretacea of M. D'Orbigny is its nearest ally. 



Locality, Pondicherry. 



Genus Fistulana, Bruguiere. 

 1. Fistulana? aspergilloides, sip. nov. PI. XVII. fig. 2. 



F. tubo tereti, longo, cylindrico, concentrice subsulcato, extremitate abrupte truncata, con- 

 vexiuscula. 



Length 3| inches. Breadth at base Oy'^ inch. 



This fossil approaches so nearly in aspect to a living Fistulana of the Indian 

 seas, that I can scarcely doubt its relations to that genus. 

 Locality, Pondicherry. 



Genus Panop^ea, Menard. 



1. Panopaa orientalis, sp. nov. PI. XVII. fig. 4. 



P. testa transverse oblonga, valde insequilaterali, concentrice regulariter undulato-sulcata, 

 extremitatibus rotundatis, hiantibus. 



Length li§ inch. Breadth 3 inches. Length from beak to farthest extremity 2i inches. 



