492 



Dr. C. \V. Andrews on a Crocodile 



no doubt ambulatory. This genus has been rightly referred 

 to a distinct family — the Macrorhynchidae — by various 

 writers ; but since the name Macrorhynchus is merely a 

 synonym of Pholidosaurus, it seems preferable to call the 

 family the Pliolidosauridge. It is distinguished from the 

 Teleosauridoe by the relatively small size of the temporal 

 fossse, the extension forwards of the nasals to meet the pre- 

 maxilla?, the more posterior position of the internal nares, 

 and the relatively larger size of tlie fore limb. 



The remarkable and little-known crocodile Hylceooliampsa 

 vectiana of Owen * has also been referred to this family, but 



nar 



HylcBOchampsa vectinna, Owen. Diaoram of the palate of tlie type 

 skull (R. 177). About | nat. size. 



cond., occipital condyle ; en.m., median Eustachian opening ; fo):, fora- 

 men in transpalatine ; i.nar., internal naxes; ju., jugal ; vix., maxilla ; 

 pal., palatine ; ^:)i., pterygoid ; q., quadrate ; s.o.v., suborliital vacuity ; 

 t.p., transpalatine. 



the structure of the palate is so remarkable, and differs so 

 widely from that found in the other Mesozoic crocodiles, and 

 in some respects from the typical Eusuchia also, tliat it 

 should certainly be placed in a distinct family, the Hylseo- 

 champsidfe. Owen's description of the upper and occipital 

 surfaces of the skull is accurate and should be referred to, 



* Fos9. Rept. Wealden and Purheck Form. Suppl. vi. (Men. Pal. Soc. 

 1874). Figured in Suppl. v. pi. ii. figs. 23-25. 



