58 PAUNA OF BALUCHI STIN. 



The suture is rather sharp. The only ornamentation consists of numerous strise of 

 growth, which indicate by their course that the aperture was provided with rather 

 a deep and broad slit, situated just a little above the middle of the height. 

 Beginning from the suture the striae of growth are at first bent strongly backwards, 

 but suddenly with a broad sweep they turn inwards in a slightly curved line. 



Aperture unknown ; internal folds unknown. 



Locality and stratigmphical position.— Maziv Drik, horizon 8. 



Remarhs. — The generic position of this species must remain somewhat doubt- 

 ful, as it is unknown whether there are any internal folds or not. I based the present 

 generic position on the course of the strise of growth, which prove the presence of a 

 slit at the aperture. The slit, together with the turreted form of the shell, render it 

 inost probable that this species belongs to the genus Nerinea. 



Among previously described species there is only one to which this form could 

 be compared, viz., Turritella haugh, d'Orbigny. This species possesses the same 

 turreted shell, composed of slowly-growing flat whorls, and the strise of growth 

 prove that it was provided with a slit at the aperture. But in this species there 

 are some very regular revolving lines towards the anterior end of the whorls, which 

 are entirely wanting in the Baluchistan specimens. Nerinea queltemis shows quite 

 a different feature towards the anterior side of the whorls. Owing to insufficient 

 material, I am unable to say whether this is only exhibited on the earlier whorls 

 and disappears in large specimens, or whether it represents a different specific 

 character. The specimen, fig. 13, which is much smaller than fig. 12, shows that 

 on the anterior side a slightly concave band runs along the suture, bordered above 

 and below by an indistinct keel, on which the striae of growth rise in small nodules. 

 The lower keel, which is generally much less distinct, coincides with the suture. 



As I have already stated, I am unable to say whether this specimen represents 

 a new species, since the earlier whorls of the type of Nerinea quettensis are broken 

 away, but as in other respects, such as the shape of the shell, and the course of the 

 strise of growth, it agrees so well with the type, I see no reason why it should be 

 separated for the present under a different name. 



Nerinea ganesha, spec. nov. PI. XV. fig. 1, 2- 2a; PI. XVI. 



fig. 1-la, 2-2a. 



This fine species must have attained a considerable size, as the tallest speci- 

 meuj which is by no means completely preserved, measures no less than 170 mm. in 

 length, the diameter of the last whorl measuring about 105 mm. The shell is 

 turreted, but it seems as if the angle of growth becomes somewhat less with the 

 advancing size of the shell, but this could not be positively ascertained owing to 

 the more or less deformed state of the specimens. This species probably consists 

 of some 20 whorls, of which only 11 are preserved in the largest specimen. The 

 whorls, which are very low, and which only increase very gradually in height, are 



