494 



Mr. E. Schwarz on new 



The occurrence in WealJen deposits of a crocodile wliicli 

 in many respects, notably in the position of its internal nares, 

 and probably in the possession of procoelous vertebrse, is 

 quite similar to the recent forms, while at the same time its 

 transverse bone differs widely from that of the earlier Meso- 

 suchia at present known, seems to make it doubtful whether 

 any of the latter are ancestral to the Eusuchia. No doubt 

 the condition of the internal nares found in them represents 

 a stage passed through by the ancestors of the Eusucliia ; 

 but it seems quite likely that those ancestors were forms still 

 unknown which lived in rivers and swamps. Goniopliolis 

 and Bernissartia, contemporaries of Ilylceochampsa, possessed 

 amphicoelous vertebrae, and I am informed by Professor Dollo 

 their transverse bones are not bifurcated or perforated by any 

 foramen. These genera tlierefore may represent fresh-water 

 or swamp-haunting types derived from the earlier amphi- 

 coelous Mesosuchia, but not ancestral to the modern crocodiles. 

 Tiie same may also apply to Pholidosaurus. The discovery 

 in the Jurassic of remains of crocodiles other than the more 

 or less pelagic types, such as Melriorhynchus and Steneo- 

 saurus, is necessary before the question can be settled. 



EXPLANATION OF PLATE VIII. 



Fiff, 1. Pholidosaurus decipiens, Watson. Skull from above. (R. 3956.) 



About T^ nat. size. 

 Fig. 2. Ditto. Dorsal scute from above. (R. 3956.) About -^ nat. size. 

 Fi(/. 3. Pholidosaurus Icevis, sp, n. Skull from above. (.Type specimeu, 



R. 3414.) About -^ nat. size. 



a.h. Anterior border of scute. 

 ex.0. Exoccipital. 

 /;•. Frontal. 



j. Jugal. 



/. Lachrymal. 

 m.v. Maxilla, 



n. Nasal. 

 oc.c. Occipital condyle. 



P- 



Process on antero-external 

 angle of scute. 

 pa. Parietal. 

 imix. Premaxilla. 

 po.f. Postfrontal, 

 pr.f. Prefrontal. 

 q. Quadrate. 

 q.j. Quadrato-jugal. 

 sq. Squamosal. 



LIX. — Neio African Antelopes of the Waterbuck Group. 



By Eknst Schwarz. 



Further study of the Ungulata brought home by the Duke 



of Mecklenburg-'s expedition has resulted in the discovery of 



the Ibllowing new forms : — 



Kohus defassa annectens, subsp. n. 

 Type locality. Badingua, Upper Sliari River. 



