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nutely described by Cuvier, as to show that it belongs to another 

 species, — for which the name of Pterodactylus macronyx is proposed. 

 A drawing of this fossil by Mr. Clift accompanies the paper. The 

 author had for some time past conjectured, that certain small bones 

 found in the lias at Lyme Regis, and referred to birds, belong rather 

 to the genus Pterodactyle. This conjecture is now verified. It was 

 also suggested to him, in 1823, by Mr. J. S. Miller of Bristol, that 

 the bones in the Stonesfield-slate, which have been usually con- 

 sidered as derived from birds, ought to be attributed to this extraor- 

 dinary family of flying reptiles : Dr. Buckland is now inclined to 

 adopt this opinion, and is disposed to think still further, that the co- 

 leopterous insects, whose elytra occur in the Stonesfield-slate, may 

 have formed the food of those insectivorous Pterodactyles. He con- 

 ceives also, that many of the bones from Tilgate Forest, hitherto re- 

 ferred to birds, may belong to this extinct family of anomalous reptiles : 

 and, from its presence in these various localities, he infers that the 

 genus Pterodactyle was in existence, throughout the entire period of 

 the deposition of the great Jura-limestone formation, from the lias to 

 the chalk ; expressing doubts as to the occurrence of any remains of 

 birds before the commencement of the tertiary strata. 



2. — Fossil Faces of the Ichthyosaurus. — The author concludes from 

 an extensive series of specimens, that the fossils, locally called Bezoar- 

 stones, which abound at Lyme, in the same beds of lias with the bones 

 of Ichthyosaurus, are the faeces of that animal. In variety of size and 

 form they resemble elongated pebbles, or kidney-potatoes, varying ge- 

 nerally from two to four inches in length, and from one to two inches 

 in diameter ; some few being larger, others much smaller. Their 

 colour is dark gray; their substance, like indurated clay, of a com- 

 pact earthy texture ; and their chemical analysis approaches to that 

 of album grsecum. Undigested bones and scales of fishes occur abun- 

 dantly in these faecal masses. The scales are referable to the Dapedium 

 politum, and other fish that occur in the lias ; the bones are those 

 of fish, and also of small Ichthyosauri. The interior of these bezoars 

 is arranged in spiral folds ; their exterior also bears impressions re- 

 ceived from the convolutions of the intestines of the living animals. 

 In many of the entire skeletons of young Ichthyosauri, the bezoars 

 are seen within the ribs and near the pelvis : these must probably 

 have been included within the animal's body at the moment of his 

 death. The author found, three years ago, a similar ball of faecal 

 matter, in the collection of Mr. Man tell, from the strata of Tilgate 

 Forest, which abound in bones of Ichthyosauri and other large reptiles ; 

 and he conjectures that these bezoars exist wherever the remains of 

 Saurians are abundant. 



3. — Fossil Sepia. — An indurated black animal substance, like that 

 in the ink-bag of the cuttle-fish, occurs in the lias at Lyme Regis ; 

 and a drawing made with this fossil pigment, three years ago, was 

 pronounced by an eminent artist to have been tinted with Sepia. It 

 is nearly of the colour and consistence of jet, and very fragile, with 

 a bright splintery fracture ; its powder is brown, like that of the 

 painter's Sepia j it occurs in single masses, nearly of the shape and 

 size of a small gall-bladder, broadest at the base and gradually con- 



