OP SOUTHERN INDIA. 417 



RADULA, Klein, 1753, (see p. 412). 



1. Radula [Plagiostoma] nudata, StoUczka, PI. XXIX, Fig. 2. 



R. [P/rr<7.] ovato seniirotmidata, antice oblique sub-truncata, paulo infiatdi 

 laevigata, striis incrementi minutissimis, et in declivitate antica ac postica striis 

 nonmillis radiantibus tecta, primis Iceviusctdis, alteris scabi'itiscrdis ; nmboiiibus pro- 

 minulis, obtusis ; aurictdis incequalibus, antica minima, postica multo majore ; lunula 

 longa, profmide excavata. 



This species is distinguished by its semi-circularly ovate shape, slightly convex 

 valves, and by the conspicuously scabrous radiating striae on the lunular region ; 

 the anterior ear is very small, not visible in a lateral view of the shell. These 

 characters easily separate the species from l^lay. Sowerbyi, Gein., which has a 

 somewhat similar form. 



Localities. — Olapaudy, in a brownish ferruginous rock ; Karapaudy, in whitish 

 sandstone. Only one specimen from each locality was examined. 



Formation . — Arrialoor group. 



2. Radula [Plagiostoma] Ootatoorensis, StoUczka, PI. XXIX, Fig. 3. 



R. \_Flag.^ magna, semiovata, timiida, sub-lcevigata, antice et p)ostice scepiusqiie 

 prope marginem ventralem costulis Icevigatis radiantibus notata, striis incrementi 

 minutissimis, extra medium sulculis nonnullis fortioribus intersectis ; atiricuUs piarvis, 

 antica minima. 



A large, rather oblique, semiovate, and moderately tumid shell, apparently 

 slightly gaping in front and behind ; the surface is anteriorly and posteriorly, and 

 often also near the ventral margin, marked with radiating slightly prominent ribs. 

 The oblique form and uniform convexity of the valves distinguish this from • other 

 known cretaceous species. 



Locality. — Ootatoor, in a \)i\\ii brown earthy limestone. 



Formation. — Ootatoor group. 



3. Radula [? Plagiostoma] interpunctuata, StoUczka, PL XL, Fig. 5. 

 Bad. testa oblique ocata, valva dextra moderate convexa, margine antero-ventraU 

 trimcato, postico convexo ; sujyerjicie costulis 2^l<*nis, radiantibus undique ornata, 

 linei-s impressis, multo angustioribus et dense punctuatis sepiaratis. 



The obliquely ovate shape of the single, figured valve, which is slightly convex, 

 and on the entire surface ornamented with flat, radiating ribs, separated by finely 

 punctated, impressed lines, indicate a species distinct from any other cretaceous 

 Radula . The posterior ear is distinct, but the anterior hardly visible, and the beak 

 somewhat injured in the specimen. This makes the sub-generic determination 

 somewhat doubtful, though the general character agrees better with Flagiostoma 

 than with any other sub-genus. 



Locality. — North-east of Ootatoor, in a yellowish brown limestone. 



Formation. — Ootatoor group. 



5 K 



