EXPLANATION OF PLATES 15'. 16. 17. 18. 29 



17. Coprolite from Lyme, containing large scales of Da- 



pedium politum. 



18. Coprolite from the Lias at Lyme, containing undi- 



gested bones of a small Ichthyosaurus. 



Plate 15'. V. I. p. 156. 



Cololite, or petrified intestines of a fossil fish from Solen- 

 hofen. (Goldfuss.) 



Plate 16. V. I. p. 157. 



1. Conjectural Restoration of the Skeleton of Plesiosaurus 



dolichodeirus. (Conybeare.) 



2. Skeleton of Plesiosaurus dolichodeirus, in the British 



Museum, from the Lias at Lyme Regis. (Scharf. 

 Original.) 



Plate 17. V. I. p. 158. 



A nearly, entire and unique skeleton of Plesiosaurus doli- 

 chodeirus, 5 feet 7 inches long, from the Lias of Street, near 

 Glastonbury. This skeleton forms part of the splendid 

 series of fossil Saurians, purchased for the British Museum, 

 from T. Hawkins, Esq. in 1834. See V. I. p. 162, and Note. 

 (Hawkins.) 



Plate 18. V. I. p. 160, Note. 



1. Under jaw of Plesiosaurus dolichodeirus, forming part 



of the series last mentioned. (Original.) 



2. Head of the Plesiosaurus, figured in PI. 16. Fig. 2. 



seen from beneath. (Original.) 



3. Ventral portion of the ribs of the Plesiosaurus, figured 



in PI. 17. See V. I. p. 162. (Original.) 

 a. c. Central bones forming the crown of the sterno-costal 

 arch. b. triple series of intermediate bones between 

 the central bones, a. c. and the true ribs, d. d. e. e. 

 lower extremity of coracoid bones. 

 3* 



