OP SOUTHERN INDIA. 421 



shell becomes rather regularly semioyate. In this state it appears to have been 

 figured as i. frondosa by Dujardin, with which d'Orbigny identifies a frag- 

 mentary specimen from the turonien. Pictet and Campiche question this iden- 

 tification ; but if d'Orbigny 's species be the same as the one figured by 

 Gueranger, I hardly think that it could be considered as a distinct species. 



Locality, — North of Poodoopolliam, in a light- coloured sandy limestone. 



Formation, — Arrialoor group. 



The species is a characteristic upper cretaceous fossil ; it has been found at 

 numerous localities in Prance and in Germany. 



12. Radula [ ? Ctenoides} scaberrima, Stoliczka, PL XXX, Pig. 1. 



Bad. \_Cteno?[ testa oblique ovata, valvis lente comexis, superficie undique 

 costulis radiantihus confertissimis, fortioribus et tenuioribiis alternantibm, omninis 

 scaberrimis, ornata ; auriciilis sub-cequalibus, radiatim crasse costulatis, costulis 

 spinulosis, aimcida postica altera majore, ultima infra marginem superiorem leviter 

 insinuata. 



An obliquely ovate, moderately convex shell, with rather large subequal ears, 

 the umbones only slightly projecting beyond them ; the surface is covered with 

 very closely-set radiating ribs, thicker and thinner ones alternating, and all are 

 so densely ornamented with sharp spinous scales that the surface receives the 

 appearance of a fresh file; it is, however, rarely that these scales remain well 

 preserved; near the umbones particularly they soon wear off. On the larger 

 posterior ear, the radiating spinulose ribs are considerably stronger than on the 

 anterior one. 



Locality, — Near Olapaudy, in a brownish ferruginous rock. 



Formation. — Arrialoor group. 



13. Eadula [Acesta] obliqui-striata, Forbes, PL XXX, Pigs. 2-5 and 13. 



1846. Lima ohliqui^ striata, Forbes, Trans. Geol. Soc, London, vii, p, 154, pi. 18, fig. 1^—eadem auctorum. 



M, [_Acesta'\ testa obliqua, sub-ovata, lente convexa, antice oblique truncata, 

 lunula paulo excavata, superficie costulis radiantibus numerosis, aut muricatis, aut 

 sublcevigatis, prope umbones obsoletis, tecta ; auricula antica minima, postica distincta, 

 margine superiore declivi, fovea ligamentali paulo excentrica. 



The form of the shell slightly varies from narrowly to broadly semiovate, as 

 indicated in the figures quoted above; towards the periphery the shell is always 

 markedly flattened. The radiating ribs are very numerous and close together, 

 and when well preserved, ornamented with numerous spinulose scales ; near the 

 beaks they generally become obsolete, and near the periphery their straight direc- 

 tion is often made slightly to deviate by concentric lines of growth. The anterior 

 ear is very small, as in all species of Acesta, the posterior considerably larger and 



5 L 



