64 FAUNA OF BALUCHISTAN. 



doubt as to their identity. Both forms fully agree in their characters with Ovula 

 expansa, d'Arch. and Haime from Sind, so that no doubt can exist now as to the 

 geological horizon of Ovula ewpansa, d'Arch., which has already been correctly 

 conjectured by Dr. Blanford. 



"With regard to Messrs. d'Archiao and Haime's other species, I refrain from 

 expressing any further opinion. Messrs. d'Archiac and Haime have figured a moder- 

 ate sized specimen of Ovula expansa which apparently has not attained the same 

 size as in Baluchistan. At Mazar Drik this species is very common and easily 

 recognizable by its globular shell, but unfortunately all the specimens are casts, not 

 a single one having preserved the shelly substance. The latter must have been 

 rather tbin as indicated by traces left on a few specimens, but for the present 

 nothing can be said about it except that it was probably smooth. The specimens 

 from Sind leave us in this respect equally in the dark, as they exhibit the same 

 state of preservation as those from Baluchistan. 



Ovula expansa, d'Arch. and Haime, seems to have a close relationship to Cyprcea 

 kayii Forbes„from Southern India, but this form is easily distinguished by its less 

 globose shape, and a smaller diameter in proportion to the height. The shell 

 appears, therefore, much longer than the globose Ovula expansa. This feature is 

 particularly striking when the two species are held side by side with the aperture 

 turned upwards. 



Ovula baluchistanensis, spec. nov. PI. XVIII. fig. 1-lb. 



I have a single cast from the D^s valley, which undoubtedly represents a species 

 differing from Ovula expansa. The shell must have been of considerable size ; it 

 measures 82 mm. in height, while its transverse diameter is about 55 mm. It is 

 ovoid in shape ; the last whorl, although strongly inflated, is much more accu- 

 minate at both ends than in Ovula expansa. The spire is not seen, but it appa- 

 rently formed a short process which was almost enveloped by the last whorl. The 

 outer lip is inflated. The aperture is long, narrow, and nearly straight ; so far as 

 can be judged, it retains the same breadth throughout its length, and does not contract 

 towards the posterior and expand towards the anterior end. 



Jjocality and sir atigraphical position. — Des valley, horizon 4. 



Hemarks. — At first glance it is not easy to distinguish this species from 

 Ovula expansa, but on comparing the two, a marked difference will be noticed in 

 the shape of the shell. In Ovula baluchistanensis the shell is rather long and 

 does not present the somewhat longitudinally compressed form of Ovula expansa. 

 In the latter form the last whorl is much more inflated, particularly on the colum- 

 ellar side of the aperture, while it is much more flattened in the former. There is 

 also the difference in shape of the aperture, which is sinuous in Ovula expamsa and 

 nearly straight in Ovula baluchistanensis. 



In addition I may say that it seems that in this species the outer lip is much 

 less inflated and the ridge on its inside much broader. All these features appear 

 to justify the separation of the above species from Ovula expansa, d'Arch. 



