40 FAPNA OF BALUCHISTAN. 



Genus : EXOGYEA, Say. 

 ExoGTRA PYRENAiCA, Leymerie. PI. IX. fig. 6-6b. 



1851. Exogyra pyrenaica, Leymerie, Sur un nouv. type pyren. M^m. de la Sec. G^olog. de Prance, 2nd Ser., 



Vol. IV, p. 194, pi. B, 4, 5, 6. 



The only ' specimen which has come under examination is of moderate size, 

 being not more than 45 mm. high. The shell is elongated, narrow, and slightly 

 curved in posterior direction. The left valve is ventricose, but somewhat depressed 

 at the back and the ventral margin. A strong rounded keel, from which the surface 

 slopes nearly perpendicularly in an anterior and more moderately in the posterior 

 direction, runs down the centre of the valve, beginning at the umbo, but becoming 

 slightly effaced towards the ventral margin. Beak depressed and strongly reversed. 

 Surface smooth, except some irregular folds due to the growth of the shell. 



Eight valve much smaller, oval and flat. A similar keel runs from the beak in 

 the axis of the valve, in front of which the surface slopes very steeply ; behind it 

 the slope is very modera<^e and the valve becomes even slightly concave. Umbo very 

 small, depressed and reversed. The anterior part, which is more or less foliaceous, 

 through numerous striae of growth, shows numerous fine but somewhat irregular 

 transverse striae, which to a smaller extent are also visible on the posterior side. 



Locality and stratigrapMcal position,- — Mazar Drik. 



Bemarks. — The specimen above described shows such complete accordance 

 in all essential features with the abovenamed species, that its identity with it is 

 beyond a doubt. If, for instance, Leymerie's figure 4 is compared with the specimen 

 from Baluchistan, it will be seen that the similarity between the two figures is 

 surprising. 



This species seems to have a wide distribution, having been first discovered in 

 the upper cretaceous strata of the Pyrenees ; it was subsequently noticed by 

 d'Archiao^ in upper cretaceous strata of Asia Minor, and now it has been found in 

 Baluchistan in the same horizon. 



2. Family: SPONDFL/D^. 

 Genus: SPONDYLUS, Linn^. 

 Spondtlus santoniensis, d'Orbigny. PI. XI. fig. 2. 



1846. Spondylua santoniensis, d'Oibigny, Falcon. Franc, Terr. Cr^t., Vol. Ill, p. 666, pi. 457. 



A large shell, unfortunately much damaged, may probably be identified with 

 this species. The ornamentation of both valves consists of numerous, moderately 

 strong, radiating ribs, some of which apparently carry large scaly spines, while the 

 intermediate ribs were only foliaceous. 



» Bullet, de la Soo. G^ol. de Prance, 2nd Ser., Vol. XVI, p. 875. 



