278 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Corbula. Nerita ; sp. tuberculated. 



Tellina. Natica (Globulus). 



Corbis ? 2 sp. 



Lucina, 2 sp ? Turbo ? 



Venus. Trochus ? 



Cardium, 2 sp. Cerithium ? 



Cardita. Purpura. 



Isocardia ? Pleurotoma, 3 sp. 



Area. Fusus. 



Pectuneulus. Pyrula. 



Nucula. Rostellaria, 1 or 2 sp. 



Chama. Strombus, 3 sp. 



Modiola. Voluta, 2 sp. 



Mytilus, 2 sp. Seraphs. 



Perna. Cypraea, 3 sp. 

 Spondylus ; allied to S. Dutempleanus, Oliva. 



D'Orb, — a chalk species. Pileopsis (Hipponyx). 



Pecten. Nautilus. 



Ostrea ; 4 smooth sp. A few undetermined Mollusca. 



1 plicated sp. Crustacea. 



1 vulselliform sp. Teeth of Shark (imperfect). 



Anomia. of Gyrodus. 



Nerita (Velates) ; allied to N. Schmi- of an undetermined species of 



deliana, Chemn. Fish. 



The Alveolina subpyrenaica frequently occurs in the Umestone along 

 the Frontier. The rock is sometimes almost entirely composed of 

 these fossil bodies, without any other form appearing ; at other times 

 they are associated with Nummiilites. 



The Alveolina is a very characteristic fossil. I have met with it as 

 far south as the Koi Kaniin, the celebrated but unfinished cutting 

 made by Shah A'bbas in the Bakhtiyari mountains for the purpose 

 of conveying the water of the Kuran into the channel of the Zen- 

 deriid, for the better supply of the city of Ispahan. The excavation 

 is made through compact yellow limestone, the surface of which is 

 broken up into small angular fragments, and again cemented by a 

 calcareous paste, containing numerous specimens of Nummulites. 

 This bed is about 20 feet thick, and is underlaid to the further depth 

 of 80 feet by the same yellow limestone with Alveolina^ which con- 

 stitutes the centre of the mass. 



The most northerly point at which I found this fossil is at Werk- 

 antz, about midway between Bitlis and Sert, S.W. of the Lake of 

 Van. It there occurs in a hard, compact, brownish-blue limestone. 

 It is found abundantly also in the province of Zohab, where some 

 fine sections of the Nummulitic rocks are exposed. 



From Kirrind the Nummulitic range is prolonged to the N.W., 

 and, rising into the lofty mountain of D^ilahu, is terminated by 

 abrupt escarpments (especially that of Ban Zardah before alluded to, 

 p. 259, fig. 2), where we have, bending over a central dome, a thick- 

 ness of 2000 feet and upwards of a crystalhne mass of grey limestone, 

 in thick beds, compact and exceedingly hard, with abundance of 

 Nummulites and Alveolince, the upper beds with flinty concretions 

 frequently taking the form of Corals and Sponges, and containing 

 large Pectines, Echini, and Foraminifera, 



East of Zohab, blue calcareous rotten shales, with thin layers of 



