or SOUTHEEN INDIA. 409 



All the specimens examined have only the fibrous layer of the shell preserved ; 

 and it seems probable that the concentric plications are more distinct when the 

 uppermost glassy layer is preserved. In form the species closely resembles some 

 Melbm C= PeniceJ, but it has not the structm*e of the shell of this genus. 



Localities. — South-west of MuUoor (common), Arrialoor, and Olapaudy, (rare) ; 

 in sandstone. 



Formation. — Arrialoor group. 



GERVILLEA, Defmnce, 1820, (see p. 392). 

 Gervillea solenoides, Befrance, PI. L, Fig. 5. 



( Tide Zittel in Dcnkseh. Akad.. Wien, xxv, pt. ii, p. 91). 



There is no specimen of this or any other species of Gernillea. in our collection, 

 nor in that formerly examined by Prof. Porbes and now deposited in the Museum 

 of the Geological Society of London. D'Orbigny, however, gives a figure of a 

 fragmentary specimen, said to have been received from Pondicherry, and identifies 

 it with the well known European fossil characteristic of the middle and upper 

 series of cretaceous beds. I have given a copy of d'Orbigny's figure in order 

 to complete here the information regarding the species of Pelecypoda recorded from 

 the Scvith Indian cretaceous rocks. 



The specimen is rather an imperfect one, but it does not appear to differ in 

 any essential character from the European fossil. It is most probably from the 

 Valudayur beds near Pondicherry. 



MELINA, Eetzim, 1788, (see p. 395). 

 Melina valida, StoUczka, PI. XXII, Pig. 1. 



Mel. testa magna, crassa, siib-quadrangiUari, longa, jjostice late sub-rotundata ; 

 margine cardinali rectiusculo, area cardinali interna lata, canalilme transversis, 

 rectis - in speciminihus adiiltis circa 23 - instrticta ; umhonihus moderate projicienti- 

 bus, angnstatis; infra vmbones insimiata, valde incrassata et Mante ; valvis modice 

 ajyj^lanatis striis et lamellis incremcnti tectis. 



A very large and robust species of an elongately sub-quadrangular shape, with 

 flattened valves and moderately projecting beaks. The hinge area is broad, and 

 in adult shells provided with about 25 straight ligamental canals ; its outer, or 

 upper, margin is in perfect specimens almost quite straight. Below the beaks is 

 a moderate insinuation, the edges of the byssal and pedal opening being very much 

 thickened, marked with coarse lamellar striae of growth, extending internally 

 sometimes to a depth of nearly two inches. Fragments of somewhat larger speci- 

 mens than the figured one are, below the hinge, nearly one inch thick. The surface 

 of the valves only exhiljits concentric striae and lamellae of growth, very similar to 

 those of M. Micordeana, d'Orb. 



Localities. — Karapaudy, in a brownish conglomeratic sandstone ; near Poodoor, 

 in a whitish calcareous sandstone. 



Formation. — Arrialoor group. 



5 H 



