374 PETRIFACTIONS AND THEIR TEACHINGS. CHAP. IV. 



part of the paddle, c, is formed by a smooth, well-defined 

 line, apparently a mere duplicature of integument. The 

 lower margin, d, exhibits the remains and impressions of a 

 series of rays, by which the fold of skin was supported, and 

 these rays bifurcate as they approach the margin of the fin ; 

 it is inferred that these processes were either cartilaginous, 

 or albuminous, like the horny tissue composing the marginal 

 rays in the fins of Sharks. The Lias at Barrow-on-Soar, 

 appears to have been peculiarly adapted to the preservation 

 of the more perishable parts of animal tissues, for Dr. Buck- 

 land detected the dermal integument of an Ichthyosaurus 

 in a specimen from that locality ; and in the fine skeleton 



LION. 76. HINDER PADDLE OF AN ICHTHYOSAURUS WITH ITS INTEGUMENTS. 

 LIAS. BARROW-OX-SOAR. 



($ nat. size.) 

 (From "Geol. Trans." Vol. VI. PL XX.) 



with four paddles, deposited in Wall-case B, p. 377, and 

 which I obtained from Barrow, there were decided traces of 

 the carbonized integuments around each paddle, but which 

 were, unfortunately, chiselled away, in developing the bones, 

 before I was aware of their true nature. 



SKIN OF THE ICHTHYOSAURUS Remains of the epidermis 

 or scarf-skin, and of the cor turn or true skin, of the Ichthyo- 

 saurus, were discovered, and first made known, by the Dean of 

 Westminster, the Very Rev. Dr. Buckland, in his " Bridge- 

 water Treatise." ! These remains were observed in the inter- 



Dr. Buckland's " Bridgewater Essay," p. 23, PL X. 



