52 



/ Slab showing the dorsal aspect of a nearly similar skeleton ; 

 from Barrow. The position of the large parietal foramen in the 

 middle of the frontals is well shown; this being a feature of 

 /. latifrons. 



g. Slab exhibiting the left side of the hinder part of the skull ; 

 from Barrow. The rostrum has been incorrectly restored in plaster. 

 h. Cast of a slab showing the upper surface of a skull belonging 

 to a species identical with or allied to the present ; from Barrow. 

 Specifically Undetermined Specimens. 



a. A series of vertebral centra from the Lower Lias of Lyme- 

 Regis. 



b. An associated series of larger vertebrae ; from Lyme. 



c. Slab with the imperfect pectoral paddles of a large species of 

 the Longipinnate group ; locality unknown. 



TEMNODONTOSA UR US PLA T YODON. 

 Ichthyosaurus platyodon, Conybeare, Trans. Geol. Soc, ser. 2, 

 vol. I, p. 108 (1822). 



a. Cast of the middle portion of a very large skull. Original in 

 British Museum (No. R. 808) ; from Lower Lias of Lyme-Regis, 

 Dorsetshire. 



b. The imperfect skull of a smaller individual ; from the Lower 

 Lias of Street, Gloucestershire. The teeth are finely preserved. 



c. The flattened skull of a still smaller individual; from the 

 Lower Lias of Lyme. 



d. Slab showing the right side of a finely preserved skull ; from 

 Lyme. 



e. The rolled centrum of a caudal vertebra. 



ORDER SAUROPTERYGIA. 



FAMILY PLESIOSAURIDyE. 

 PLIOSAURUS BRACHYDIRUS. 



Owen, Odontography, p. 283 (1841). 

 a. The centrum of a caudal vertebra ; from the Kimeridge Clay 

 of England (No. 658). 



