OE SOUTHERN INDIA. 407 



3. Inoceramus diversus, StoliczM, PI. XXVII, Eig. 6. 



L testa suh-qiiadrcmgula, ? incBquwalvi (valva dextra modice inflata, sinistra, ut 



videtur, comexiuscule deplanataj, valde i/nrnqtiilaterali, umbonibm anticis, obtusatis, 



modice incurvis, margine anteriori et superiori sub-obtusis, posteriori et inferiori leviter 



curvatis; superficie plicis concentricis, margines versus sub-obsoletis, costis radiantibus, 



fortioribus, undulatis et partim nodulosis inter sectis, ornata, 



A very characteristic ornamental species of a sub -quadrangular form, inflated, 

 with the right valye apparently a little more convex, beaks almost quite anterior 

 slightly incurved. Of the left valve only a marginal portion has been seen, which 

 is distinctly flatter than the corresponding part of the other valve, indicating the 

 inequality in the form of both. Whether the same applies to the size of the valves 

 has not been observed. Both are only known from cast specimens, which show a 

 rather coarse concentric plication, the plicae becoming less distinct toward the 

 margins, being here intersected by stronger, partially nodulous, radiating ribs. 

 Portions of the shell preserved indicated that it was of moderate thickness, and 

 of the usual fibrous structure. 



Locality, — Anapaudy, in a brownish sandstone ; apparently rare. 



Formation, — Trichinopoly group. 



4. Inoceramus Geinitzianus, Stoliczka, pi. XXVII, Eigs. 4-5. 



7. testa sub-quadrangulari, longiore quam alt a, ad medium paululum dilatata, 

 sub'Cequivalvii inflata, antice plus minusve abrupt e truncata, regione lunulari depla^ 

 nata, umbonibus acutis, fere rectiuscule incurvis, anticis ; margine superiore recto 

 postice moderate extenso, modice incrassato, margine posteriore supra paulo insinuato 

 infra convexo, margine inferior e convexiusculo ; superficie plicis crassis sub-cequalibus 

 et striis confertis concentricis notata. 



This species is closely allied to I, striatus, Mant., but it is much less inequi- 

 valve, the right valve being apparently only very little, if at all, smaller than 

 the left one ; the ribs and strise also appear to be posteriorly somewhat more 

 distinctly flexuous than in the European striatus, Geinitz (Kieslingswalda, pi. iii, 

 fig. 12,) figured a right valve of an Inoceramus (under the name of I, concentricus) 

 which most closely resembles our Indian fossil ; it has been perhaps wrongly 

 identified with I, latus, Mant., for it shows much more affinities to striatus than to 

 latus, and if it does not belong to the former species, it may very likely be identical 

 with the Indian one. The species attains a large size; some specimens from 

 Koloture measuring about 160 m. m. in length and up to 130 in greatest height. 



Localities, — South-west of Coonum, Puravoy, Ootatoor, Kolakonuttom, Ana- 

 paudy, near Koloture, and Garudamungalum. At the last locality the rock is a 

 brownish grey sandstone with a large number of small shells ; at the other localities 

 the specimens occur in a brownish or yellowish highly calcareous and earthy 

 sandstone. 



Formations. — Ootatoor and Trichinopoly groups. 



5 G 



