OF SOUTHEEX IXDIA. 125 



TELLINA, Liiiiu', 1758. 

 (Including sub-genera, vide p. 116, &c.). 



1. Tellina [Tellinella] petrosa, Stoliczka, PL XVI, Figs. 27-28. 



Tell, testa elongata, mnlto longiore quam alta, parte antica jmnlulum longiore 

 quam postica, utinnque distincte attenuata, marginibiis stqjerioribus declivis, sub- 

 rectis, nntice angiiste-rotnndata, postice suh-angulata, plicattira paulo elevata ; 

 mctrgine inferiori lentissime curvato ; mperficie striis crasskificulis lamelliformibus 

 confertis notata. 



This is a rather elongated form, of the type of the recent Tell, rostrata, nearly 

 or fully double as long as high ; with the vipper edges descending gradually and 

 meeting at the beaks under an angle of about 132 degrees; the anterior edge 

 is somewhat convex, the posterior nearly straight ; the anterior end is rounded, the 

 posterior obtusely angular ; the inferior margin is very slightly curved. The shell 

 is thin, though not particularly so ; the siu'face is covered with concentric lamellar 

 striae ; the posterior plicatm-e is slightly elevated, though distinct. I have not been 

 able to observe the hinge of this species, but there can be little doubt that it 

 belongs to the sub-genus Tellinella. On the specimen represented in fig. 28, 

 ■which is a cast, the lateral teeth are observable as impressions. 



Locality. — Garudamungalum, in a bluish calcareous sandstone. 



Formation. — Trichinopoly group. 



2. Tellina [Tellinella] Arcotensis, Stoliczka, PI. V, Fig. 2. 



Tell, testa transversaliter elongata, valde co^npressa, fere cequilaterali, antice 

 latiore, rotundata, postice angustata, siib-rostrata ; props marginem distincte sulcata ; 

 iimbo7iibns pro^ninnlis, lateribiis superioribus patilnlum declivis, fere rectis, margine 

 postice antice convexo, p)ostice insimiato ; superficie striis confertis, subtilissimis 

 concentricis eleganter notata. Cardo in valva sinistra duobus dentibus cardinalibus 

 atque duobus lateralibns elongatis, sed paulo prominulis, instnictus. 



Shell thin, veiy much compressed, transversally elongated, nearly equilateral, 

 anteriorly rounded and broad, posteriorly gradually attenuated, angular, a distinct 

 groove, bounded on either side by a moderately elevated ridge, running to the pos- 

 terior end ; beaks prominent, pointed, the upper sides nearly straight, descending, 

 meeting at the beaks under an angle of 135 degrees ; lower margin anteriorly 

 convex, posteriorly flexuous, insinuated ; surface minutely and very regularly 

 concentrically striated. The hinge has in the left valve as usual two cardinal and 

 tAvo slightly prominent lateral teeth. 



This is a true species of Tellinella ; it greatly resembles several recent species. 



Locality. — Jsinnyoor, in a white earthy limestone. 



Formation. — Arrialoor group. 



2 H 



