126 CRETACEOUS PELECYPODA 



3. Tellika [ ? PeroNyEODEUma] scitulina, SloUczka, PI. IV, Pigs. 10-13, and 



PI. XVI, Pig. 30. 



Tell, elongata, moderate compressa, crasshiscnla, infcqnila/erali, j^xirte antica (t) 

 hreviori, ad maryinem rolundata, parte jyoslica producta et attemiata, siih-anyulata, 

 plicatura hand distlncta ; marfjinihus stiperiorihus fere rectis, declivis, angtthim 130° 

 formantihus ; margine inferiori convexiusctdo, snperficie striis distantibus, lamel- 

 losisy crassiusculis seu corrugatis ornata. Cardo dnobiis dentihus cardinulilnis 

 uc lateralihus in utraque valva instructus. 



Shell elongated, moderately compressed, more than one-third longer than 

 hio-h, marked with distant lamellar or rugose concentric striae; Leaks promi- 

 nent, superior declivities meeting with an angle of 130 degrees; the anterior 

 side shorter, hroadly rounded; posterior somewhat produced and attenuated, 

 liardly flcxuous, inferior margin almost evenly convex. The hinge has two cardinal 

 and two lateral teeth in each valve, the posterior cardinal in the left and the 

 anterior in the right are stronger than their respective anterior and posterior ; the 

 laterals of the left valve are considerahly smaller than those of the right one, hut 

 quite distinctly traceahle ; they are elongated, thin, marginal. — The somewhat solid 

 structure of the shell as compared to its size, and the peculiar apparently rough 

 striation, readily distinguish this species from any other known. In form it closely 

 resemhles the Gosau Tell. Stoliczkana, but all our specimens are considerably longer 

 in proportion to the height : — figure 10 on pi. v is in tliat respect somewhat incor- 

 rect, and a second representation of the same specimen is given on pi. xvi, fig. 30. 

 The posterior plicature is indistinct. As to form the shell bears a great resem- 

 blance to a Ilcera, but I could not satisfactorily prove that the shorter side is the 

 posterior ; to all appearance the shorter side seems in our shell to be the anterior 

 one, at least there is in one specimen (fig. 10a, pi. v,) a small ridge behind the 

 umbones which can only be explained as a fulcrum ; I have not been able, however, 

 to see the pallial sinus. 



Locality. — Comarapolliam, in a light coloured sandstone. 



Formation . — Arrialoor group. 



4. Tellina [Tellinides] primula, Stoliczka, PI. V, Fig. 1. 



Testa ovata, fere mquilaterali, tennissima, valde comjjressa, antice rolundata, 

 jwstice obtuse ac late truncata, jiigo panlulum eleoato ab umbonibiis ad marginem 

 postero-inferiorem decurrente iustructa ; marginibiis supenoribus paululmn declivis, 

 lente curvatis, margine inferiori convexo, postice vix flexnoso ; snperficie striis 

 (equalibits, sitbtilissimis concenfricis induta. Cardo in valca dextra duobits dentibiis 

 cardinalibus distinctis et imo postico laterali instructus, dente laterali anlico fere 

 obsoleto. 



Shell oval, nearly equilateral (the posterior part very little shorter than 

 the anterior), about one-third longer than high, very thin and compressed ; the 



