130 CEETACEOUS PELECYPODA 



y 9. Tellina [ANauLUs] UNDATA, StoUczka, PL V, Pig. 3. 



Tell, ovato-elongata^ solidula, convexiuscula mcBqxdlaterali^ parte antica multo 

 breviori, late rotundata, parte postica producta, flexuose attenuata ac plicatura 

 distincta instructa ; nmbonihus incurvis, acutatis ; margine anterO'Superiori hrem 

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

 crassiusGulo, altera fanticoj tenui, paululum prominulo instructiis ; dentibus 

 lateralibus elongatis ; superficie concentrice obsolete striata. 



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

 anterior side is only about |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 

 angle of about IM 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, — ComarapoUiam, in whitish sandstone. 



Formation, — Arrialoor group. 



x/10. Tellina [Linearia?] semisculpta, Stoliczka, PL V, Pig, 5. 



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

 postice rotmidata, polita, concentrice crassiuscule striata, et in dimidio antico radiatim 

 costulata ; umbone paulo prominulo antice versus incurvo ; marginibus superioribus 

 angulum 130° formantibus, margine inferiori levissime curvato. 



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- 

 ture of the shell. 



LocaUty.—^QT^mmm^dlwooL, in a brownish calcareous sandstone; the species 

 appears to be very rare. 



Formation, — Trichinopoly group. 



