GASTROPODA. 57 



preserved, and as the apex and the anterior part of the shell are broken off, it must 

 have possessed several more whorls. According to the striae of growth, the aperture 

 was provided with a broad slit. The ornamentation consists of fine ispiral ribs, of 

 which from 5 to 6 form a rather broad band on the anterior side of the whorls : the 

 rib next to the suture is generally the strongest, originating in the combination 

 of 3 or 4 finer ribs, Above this band the surface is just perceptibly concave, and 

 the spiral ribs become more indistinct, but exceedingly fine undulating lines may 

 be seen between them. The strise of growth produce a somewhat scaly appearance 

 of the surface. 



Locality and stratigraphiaal position. — Mazar Drik, horizon 8. 



BemarJes. — Although the general appearance of this species resembles that of a 

 Turritella, its general position must be regarded as provisional only, as the slit 

 at the aperture will not allow its being considered as a true Turritella. Here also 

 we must wait until better preserved specimens allow this question to be decided. 



-Family : CAPULISM 

 Genus : CALYPTR^A, Lam. 



Calyptr^a, sp. PI. XIV. fig. 11-lla. 



The cast of a low turbiniform shell probably represents this genus ; it consists 

 of |pur low whorls which increase very slowly in height ; the surface is slightly in- 

 flated and the suture deep. The last whorl bears a sharp keel which divides it from 

 the concave base. 



Jjocality and stratigraphical position.— D^s valley. 



Remarks. — Although I have no doubt that this specimen belongs to the genus 

 Calyptrisa, I refrain from giving it a specific name because the surface of the shell 

 is not known. It seems closely related to Infundibulum {Calypcopsis) cretacea, 

 d'Orb., but it seems that the latter has rather a higher shell than that of the specimen 

 from Baluchistan. The resemblance between the species is, however, so great that 

 it is quite possible that they may be identical. 



II. SIPHONOSTOMATA. 

 A, ENTOMOSTOMA. 



Pamily : NEBINEID^. 

 Genus : NERINEA, Defranee. 



Nerinba qijettensis, spec. nov. PI. XIV. fig. 12-12a, 13. 



The shell is turriform, consisting of moderately high, flat whorls, which 

 increase very gradually in height ; the shell appears therefore nearly cylindrical. 



