THE EAUNA OE THE NEOCOMIAN. 3 



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Locality and stratigraphioal position. — Mazdr Drik, Sembar pass, B^ji valley, 

 Sonari hill, DungMn mountain ; belcmnite shales. 



Memarks. — The specimens under examination are not well preserved, as in no 

 case can the alveolar cavity be observed ; they chiefly represent fragments of varying 

 size of the posterior part of the guard, but these are quite sufficient to establish the 

 identity of this species. Belemnites {Duvalia) dilatatus is particularly distinguished 

 from others by the strong lateral compression of its shape, the short ventral canal, 

 and the double dorso-lateral furrow — features which are well exhibited in the speci- 

 mens under examination. 



As already stated, it varies considerably in regard to its shape ; younger speci- 

 mens seem to be more lanceolate than older ones, which become broader, and as the 

 grade of compression also varies a good deal, the transverse sections vary greatly, as 

 may be seen from the figures, but the chief characters as above defined can always 

 be recognized. 



It is therefore established beyond doubt that this well known species from the 

 French neocomian is also represented in Baluchistdn, where it appears in as great 

 a number of varieties as elsewhere. 



Belemnites lattjs, Blainville, plate I, figs. 15-15a. 



1828. Belemnites latus Blainville, M^m. sur les Bflemn., 121, pi. 5, fig. 4. 



There is only a single specimen which, I can refer doubtfully to the above- 

 named species. The elongated guard measures about 55mm. in length, but it is not 

 complete at either end. Apparently it was slightly compressed in a lateral direc- 

 tion. The ventral canal is extremely long and extends quite close to the posterior 

 end. Cross section nearly circular at the posterior and elliptical at the anterior end. 



Locality and stratigrapUcal position. — Jali, Robdar, Boldn pass; belemnite 



shales. 



Bemarks. — It was chiefly on account of the long ventral canal that I have refer- 

 red this form to Belemnites latus, BL, but it is impossible to be certain of a deter- 

 mination based on a single specimen, which is in addition considerably damaged. la 

 its general shape, but particularly in regard to the length of the canal, it agrees with 

 the figures given by d'Orbigny and Duval ; but more and better preserved material 

 is required to set the above determination beyond doubt. There is of course no 

 reason why Belemnites latus should not also occur in Baluchistan, when those forms 

 with which it is associated in southern France, have been already recognised there. 



2. Gastrocoeli. 



Group: HASTATI. 



Belemnites pistilliegrmis, Blainville, plate II, figs. 8-86, 9-90, lO-lOa, 11-11«. 



1827. Belemnites pistilliformis, Blainville, M A. sur les B^lemn., p. 98, pi. 5, fig, 14. (For synonyms ses Duval- 

 Jouve, Belemnites, page 72.) 



