OF SOUTHERN INDIA. 463 



inciu'co, noMiunqiiam irregulari, sessili ; valva minore aut plana ant paulo concava, 

 snb-lceviffata, in parte postica et ad marginem undique striis lamellatis concentrlcis 

 instructa ; fovea ligament, longa, curvata, angiisti^sinia, profunda; imjjressione muse, 

 excentrica, sub-antica, late rottmdateque ovata. 



The specimens from South Imlia perfectly agree with the European species, 

 so well known under the name Ex. columba. Irregularities in the lower valves, 

 depending vipon the form of the ohject to which they are found attached, are found 

 in India and in Europe. A peculiar form is represented in fig. 4, pi. xxxv, in 

 which the shell near the beak is irregularly striated, or rather ribbed, the ribs 

 extending posteriorly almost to the margin. Other forms found in the same locality 

 are quite smooth and barely show a trace of attachment. The species attained in 

 India the same large size as in Europe. 



It seems almost a pity to abandon the well known name Ex. columba, but if 

 strict priority has to be enforced, Lamarck's oldest name suborbiculata mw.%t he 

 adopted, and not Ratisbouensis of Schlotheim, for Lamarck had no more right to 

 give up the former name, than other authors had a right to prefer Batisbonensis to 

 columba. 



Localities. — Poodoor, Monglepaudy, north-east of Paravoy, in brownish cal- 

 careous sandstone. 



Formation. — Ootatoor group. 



This species is characteristic for the Upper Greensand, or the middle series of 

 cretaceous deposits (Carentonien of Coquand) ; it holds exactly the same hori- 

 zon in India. It has been found all through Europe and Northern Asia. 



8. ExoGYRA CANALICULATA, Sotcerbi/, PI. XLVIII, Figs. 6 — 8. 



1813. Chama canaliculata. Sow., Min. Conch., I, p. C8, pi. 2G, fig. 1. 



1869. Ostrea canaliculata , apud Coquand, Mon. Ostr. cret., p. 128, cum syn. 



Ex. testa irregnlariter sub-ovata ; valva majore convexa, prope mnbonem lateral- 

 iter sessili et plus minusve irregulariter expansiuscula, laevigata, lamellis incrementi 

 nonnullis distantibus notata ; umbone angusto, depressiusculo, lateraUter intorto ; 

 valva minore ant planata, aut concava, ad timbonem plus minusve distincter tortmn 

 paido elevata, concentrice crasse lamellata, nonnunquam striis radiantibus, interruptis, 

 indistinctis, sparsim iiotata, margine ventrali et dorsali prope umbonem denticulato. 



This species is, as pointed out by Coquand, very closely allied to Ex. lateralis 

 of Nils son, the latter having apparently the larger valve longitudinally more nar- 

 rowly convex and the smaller valve less strongly lamellated. In these points the 

 few Indian specimens of the larger valve better agree with canaliculata, and so 

 does also the ornamentation of the smaller valve, possessing on the surface a few 

 radiating lines, which are also indicated in Sowerby's original figure. The Indian 



