GONIOPHOLIDID^:. 89 



Genus PETROSUCHUS, Owen \ 



Cranium apparently of a brevirostrine type, but somewhat more 

 elongated than in GoniopJiolis ; orbit considerably smaller than 

 supratemporal fossa ; mandibular teeth moderately differentiated ; 

 a vacuity in the mandible. 



Petrosuchus laevidens, Owen 2 . 



The type species ; length of cranium probably about one foot. 

 Hab. Europe (England). 



28432. The cranium, imperfect anteriorly ; from the Purbeck of 

 (Fig.) Swanage, Dorsetshire. The type specimen ; figured by 



Owen in his ' Wealden and Purbeck Reptilia,' suppl. viii. 



pi. vi. figs. 1, 2. Purchased, 1853. 



41099. The greater portion of the right ramus of the mandible ; 

 (Fig.) from Swanage. Figured by Owen, op. cit. pi. vi. fig. 3. 



Purchased, 1868. 



43598 a. A slab of Purbeck Limestone containing the hinder part 

 of the right ramus of a mandible, three scutes, a late 

 caudal vertebra, and an imperfect long bone, which may 

 not improbably belong to the present species. The scutes, 

 which are seen from their inner surface, have no peg-and- 

 socket articulation. No history. 



Family Position Uncertain. 



Genus non det. 



48362. The imperfect dentary element of the right ramus of the 



mandible of a longirostrine Crocodilian probably belonging 



to the Goniopholididce ; from the Purbeck of Swanage, 



Dorsetshire. The teeth are small and widely separated. 



Heckles Collection,. Purchased, 1876. 



Genus SUCHOSAURUS, Owen 3 . 



Founded upon detached teeth, which are slightly curved, much 

 compressed, with the enamel thrown into strong ridges and grooves, 

 and with two carina placed in a plane at right angles to that of the 



1 Wealden and Purbeck Reptilia (Mon. Pal. Soc), suppl. viii. p. 10 (1878). 



2 Loc. cit. 



3 Rep. Brit. Assoc, for 1841, p. 67 (1842). 



