488 Dr. C. W. Andrews on a Crocodile 



is immediately in front of the ventral prominence of the basi- 

 occipital. The bones of the back of the skull are much 

 crushed, but it can be seen that tlie paroccipital process of 

 the exoccipital is very large, widening towards its outer end, 

 where it terminates in a thickened rounded border ; the 

 quadrate region does not seem to present any peculiarities. 

 Tlie bones of the skull-roof show a feeble sculpturing of pits, 

 for the most part irregularly arranged, but on the frontal 

 radiating from the middle of the bone. On the snout the 

 pits are replaced by short, irregular, but for the most part 

 longitudinal, grooves. 



The skull just noticed agrees very closely with that 

 described by Owen (Foss. Rept. WealJ. and Purbeck Form. 

 8uppl. viii. (1878) p. 10, pi. vi. figs. 1, 2) under the name 

 Fetrosuchus Icevidens. Mr. D. M. S. Watson (Mem. and 

 Proc. Manchester Lit. and Phil. iSoc. vol. Iv. (1910-11), 

 Mem. xviii. p. 9) has, however, pointed out that this specific 

 name can only apply to the mandible of a short-snouted 

 crocodile which Owen wrongly regarded as associated with 

 the skull, so that it is this mandible which must be regarded 

 as the type of Fetrosuchus Icevidens. The skull agrees very 

 closely with that of Macrorhynchus schaumhergensis as 

 described by Koken (Palseont. Abhandl. vol. iii. (1887) 

 p. 334), and may no doubt be referred to the same genus, the 

 )iame for which should be FhoUdosaurus (von Meyer), which 

 antedated Macrorhynchus by some years. The name FhoUdo- 

 saurus decipiens has been suggested by Mr. Watson [loc. cit.) 

 for the skull described by Owen, and that name is here 

 adopted for the specimen under discussion. 



The mandible had a very long symphysis into which the 

 sj)lenial seems to have entered for a short distance only, a 

 circumstance which distinguishes it from FhoUdosaurus 

 f^chaumbergensis, H. v. Meyer, in which, according to Koken, 

 the splenial extends nearly half the whole length of the 

 S3-mphysis. Anteriorly there is a slight expansion, showing 

 that a premaxillary expansion was also present. 



The atlas is all preserved, but the parts composing it are 

 scattered. The odontoid remains attached to the centrum of 

 the axis ; its postero-inferior angles bear facets which 

 probably helped to support the large first rib, whicii is a 

 flattened bar of bone, pointed posteriorly and showing no 

 trace of a tubercular process. The first subvertebral wedge- 

 bone (hypocentrum of atlas) is closely similar to that found 

 in the young alligator ; it is notched posteriorly and bore a 

 pair of facets which helped to form the surface for the support 

 of the first rib. The two halves of the neural arch are 



