130 CRETACEOUS PELECYPODA 



9. Tellina [Angulus] tjndata, StoUczka, PI. V, Fig. 3. 



Tell, ovato-elongata, solidula, convexiuscula incequilaterali, parte antica multo 

 hreviori, late rotunclata, parte postica producta, Jlexiiose atteniiata ac plicaturu 

 distincta instrncta ; timbonibits incurvis, aciitatis ; margine antero-superiori brevi 

 fere recto, postico lente eurvato. Cardo in valva sinistra dente uno cardinali 

 crassiiiscido, altera fanticoj tenui, paululum promimdo instruct us ; dentihus 

 lateralibus elongatis ; superficie concentrice obsolete striata. 



Shell ovately elongated, rather thick, somewhat convex, inequilateral, the 

 anterior side is only about J-th of the total length of the shell, broadly rounded, 

 the posterior attenuated, obtusely angulated and distinctly ridged ; the beaks are 

 prominent, incuryed towards the front ; the upper anterior margin is nearly straight, 

 the posterior much longer and slightly curved ; both meet at the beaks with an 

 ano-le of about 114 degrees. The surface is obsoletely concentrically striated, a 

 rather unusual appearance in Tellina. 



I have seen only two left valves of this species ; in both the middle cardinal 

 tooth is strong, the other cardinal tooth in front of it thin and very slightly promi- 

 nent; the laterals are elongated, and almost throughout of the same thickness. 

 The peculiar convex form and solidity of the shell are very characteristic of this 

 species. 



Locality. — Comarapolliam, in whitish sandstone. 



Formation. — Arrialoor group. 



10. Tellina [Lineabia?] semisculpta, StoliczJca, PI. V, Pig. 5. 



T. (Lin.) testa late subtrigona, valde compressa, fere cequilaterali, antice ac 

 post ice rotuiidata, polita, concentrice crassiuscule striata, et in dimidio antico radiatim 

 costulata ; umbone paido prominulo antice versus incm^vo ; marginibus siipe»'ioribus 

 angulum 130° formantibus, margine inferiori levissime eurvato. 



The sculpture of the only specimen is so very characteristic that this species, 

 though only known from a single imperfect specimen, can be readily distinguished 

 from any other shell found in our South Indian cretaceous deposits. The whole of 

 the anterior half is ornamented with flat radiating ribs, and the entire surface 

 besides covered with concentric striae, being rather strong as compared with the size 

 of the shell. The hinge could not be exposed on account of the very thin struc- 

 tvxre of the shell. 



Locality. — Serdamungalum, in a brownish calcareous sandstone; the species 

 appears to be very rare. 



Formation. — Trichinopoly group. 



