OP SOUTHEEN INDIA. 4.39 



sub-cequalibus, sulcis fere diiplo latioribus separatis ; utraque valva concentrice 

 minute striata, biauriculata, auriculis sub-cequalibus, postica majore, et ad marginem 

 obliquiore. 



The ribs on the convex valve are generally very indistinct, but in well pre- 

 served specimens they always are slightly convex; they are 22-24 in number, 

 separated by very fine impressed lines ; as a rule, they are equally strong, but 

 occasionally one or two exceed others in breadth. On the left or flat valve the 

 ribs are more prominent, separated by broader furrows, which on the inner side 

 appear as many broad and flat ribs ; this character easily distinguishes the flat 

 valves of the present species from those of quinquecostata, even when the extreme 

 margin of the shell is not well preserved. I have accepted the name IcBvis, 

 Drouet, for the present species, following in this identification Pictet and 

 C amp iche, who consider Jj^m^va^.'^ phaseola as a distinct species. I am not 

 acquainted with Drouet 's original description. 



Localities,— ^Q^v KuUay, Coonum, Odium, and Koloture. 



Formation, — Ootatoor group. 



This species occurs in the Cenomanien of Prance. 



HINNITES, I>efrance, 1821, (see p. 427). 



1. HiNNiTES Andoohensis, StoUczka, PI. XXXII, Pig. 10. 



R, testa late ovata, sub-cBquilaterali, antice parum dilatata, incequimlvi, valva 

 convexa radiatim multicostata, costis fortioribm, una, vet dnabus, aut tribus, tenuioribus 

 alter nantibus, striis concentricis acutis decussatis, aliquando spinulose sub-tuber- 

 culatis; valva dextra plana, radiatim obsolete in-cequaliter costulata ac concentrice 

 striata ; auricula antica magna, ad basin profunde insinuata. 



Shell ovate, with the anterior side somewhat dilated ; the left valve is consi- 

 derably convex, ornamented with stronger and thinner radiating ribs, crossed 

 over by concentric, sharp striae, by which the ribs become somewhat undulating, 

 e.specially towards the margins. The right valve is quite flat, and the radiating 

 ribs on it much less distinct. 



Locality. — Near Andoor, in an earthy, brownish limestone. 



Formation, — Ootatoor group. 



XLIII. Family,— SFONDYLIDJE. 



The animals have the mantle margins usually thickened, consisting of two 

 or three laminse, unequally cirrated at the edge, often with a few larger filaments 

 between them; numerous small ocelli are placed at short distances from each 

 other at the base of the internal cirrhi; mouth surrounded by a large foliaceous 

 lip, to which laterally the palps are attached, being of an oblong, terminally pointed 

 shape ; gills large, fleshy, equal or sub-equal, posteriorly somewhat similarly curved 

 as in Avicula, and free ; foot small, cylindrical, somewhat thickened at the end, 



