77 



"In the ferruginous sand deposit, I found the lower jaw 

 of a diadelphis, with the frontal teeth, also, a portion of the 

 alveola process of an unknown quadruped. Besides these, 

 there are stags' horns and several kinds of rihs ; likewise, the 

 cranium of the Darypus grandis, with detached fragments of 

 its hony amiour, and numerous teeth and vertebrae of sharks, 

 sawfish, and of several other unknown species, peculiar in 

 their kind. 



" The new species of Testacea, which I obtained at this 

 place belong to the genera Lucina, Cythersea, Nucula, Ostrea, 

 Hypponix, InfuncUbulum, Natica, Scalaria, Solarium, Turbo, 

 Turritella, Pleurotorua, Cancellaria, Fusus, Murex, Nassa, 

 Miti-a, Voluta, Oliva, and Conus. 



" In addition to these, under the head of Radiatce, I. 

 obtained an extraordinary species of Galerites and of Tur- 

 binolia, which completes the catalogue of my discoveries at 

 tins place. If opportunity had admitted, these researches 

 might have been pursued further with much success. 



" At the west, in the interior of Clark County, as already 

 observed, the cretaceous beds crop out from beneath the 

 tertiary. They may also be traced again in the vicinity of 

 each other, at the distance of twenty miles, in a north-east 

 direction, near the Alabama river. The northern limi ts of 

 this formation extend through Greene and Perry counties, 

 by an irregular line, to the falls of the Coosa. 



" Within these limits, they may be studied to advantage, 

 more especially by means of their fossil contents, which in 

 many places are very abundant. At Prairie Bluff, Wilcox 

 county, I collected upwards of a hundred different genera 

 and species, all more or less characteristic of the cretaceous 

 system. Among these is a costal bone of a large animal, 

 but being only a fragment, it is difficult to identify the species. 

 The characteristic kinds, such as Nautili, Ammonites, Bac- 

 culites, Scaphites, Exogira, and Griphaea, particularly the 

 four last, are very numerous. Other genera, as Terebratula, 

 Inocerami, Turrelites, Belemnites, Galerites, &c, though not 

 so numerous, are sufficiently so to distinguish the deposits. 



"Forty miles south of this place, in Clark County, 

 I obtained a single vertebra of some one of the large 

 reptile species, about six inches in diameter, and the same 

 in length, in a very perfect state of preservation, and 

 also found here, Griphaea, Pectens, Galerites, bin 

 Spatangi, TuiTelites, and Turbos. It was not convenient 

 to visit the great Saurian deposit, in the same latitude near 

 the Tombeckbe river. This undertaking I must defer to « 

 future period. 



