298 Capt. Grant on the Geology of Cutch. 



five inches : the largest I found being eight inches. It was imbedded in a mass of gold-coloured 

 oolite. The genus next abundant is the Terebratula. Of the seven species collected by me, five 

 bear so close an analogy to the T. biplicata, T. dimidiata, T. sella, T. intermedia, and T. con- 

 cinna of the green sand and oolitic series, that it has been found impossible to consider them di- 

 stinct species. The Trigonias are numerous, though confined to two species, one of which differs 

 so very little from T. costata of the lower oolites of England, that Mr. Sowerby considers it only 

 a variety of that fossil. The genus Pholadomya also abounds, but the specimens are generally 

 broken. Of the three species I collected, Mr. Sowerby has not been able to establish an iden- 

 tity with any known Pholadomya in England, although there is a general resemblance to the 

 oolitic and lias fossils. 1 found two species of Belemnites, one of which resembles i?. canaliculatus 

 of the inferior oolite ; the other is not determinable. Of the species of oysters, one resembles 

 the Ostrea Marshii (see Plate XXII. fig. 9.) of the English cornbrash. I found it in a bank high 

 up the Katrore hill, in the Charwar range, in friable, laminated strata of slate-clay and sandstone 

 slate, associated with Ammonites of the same description as those at Charee and along the Runn*. 

 I did not find a single specimen of a Gryphasa, although numbers of the genus have been col- 

 lected from this province. Some crinoidal stems, which I collected from the same localities (see 

 Plate XXIII. figs. 14, 15, 16.) resemble those of a species found in the mountain limestone; but 

 as the fossils above enumerated characterize the middle series of the English upper secondary 

 rocks, fossils belonging to so much older a formation can hardly be associated with them. 

 These crinoidal remains, therefore, probably belong to an undescribed species. The only fossil 

 bone which I discovered, Messrs. Clift and Owen consider to be a caudal vertebra of a Saurian. 

 This determination is, however, very interesting, as it shows how widely these animals were 

 distributed ; being, in this distant country, also associated with the same mollusca (one valve of 

 a Trigonia costata is imbedded in the mass containing the bone) as accompany their remains in 

 the English strata. 



In the Appendix to this paper I have given a complete and systematic list of all these fossils, 

 stating the localities where I collected them. 



General Shape of the Hills belonging to this Formation. — Many of the hills 

 in Cutch present, on the north side, a perpendicular cliff surmounting a sloping- 

 talus, and on the south an inclined plane ; and they owe this peculiar outline to 

 their being- composed of a base of laminated clay or sandstone, capped by a 

 thick bed of coarse and brittle sandstone. This is particularly the case in the 

 Jarra hill, and the hills of Hubbye, Lodye, and Roha-ke-Koss, near the village 

 of Joorun, on the Runn ; also those of the Puchum and Khureer islands in the 

 Runn, particularly the latter; likewise those near Beyla, at the north-eastern 

 extremity of the province, and many others. The Katrore hill, forming the 

 eastern extremity of the Charwar range, belongs to this formation, and, there- 

 fore, differs materially from the greater part of the range, which is composed 



* At the base of these hills, and forming the immediate borders of the Runn, fossil shells are 

 found of a very different description, among which I may enumerate Cardium, Pecten, Corbula, 

 Venus, Globulus, and vast quantities of Turritella ; which last form large masses of rock protrud- 

 ing every here and there above the bed of the Runn. 



