364 LIEUT. R. BROOM ON 



and very little can be made out beyond tlie impression of tlie 

 inner sides of the upper cranial bones. Very little remains of 

 the elements in front of the orbit and practically nothing of the 

 tabular and postparietal regions. 



The parietals, which are clearly paired, are unusually large and 

 have between them a large pineal foramen. The anterior end of 

 the parietal is in front of the ti-ansverse plane through the 

 postorbital margin. 



The frontal is relatively small. The postfrontal and post- 

 orbital are of about equal size — each a little larger than the orbit. 

 The jugal has a very well-developed portion lying between the 

 orbit and the quadrate j ugal and squamosal, and here there has 

 evidently been a moderate-sized boss. 



The squamosal is large and the suprasquamosal only a little 

 smaller. The tabular has evidently been small and the post- 

 parietals short antero-posteriorly. 



The occipital region slopes back from the postparietals, and 

 the exoccipital condyles are considerably behind the plane of the 

 quadrates. 



In the figure I have given, the sutures in line are those seen on 

 the specimen ; those in broken line are from those of the opposite 

 side ; those in dot are hypothetical, 



BoTHRiCEPS AusTRALis Huxley. (Text-fig. 2.) 



In 1859 Huxley described a small Stegocephalian from 

 Australia, under the name Bothriceps anstralis. Though smaller 

 than Brcichijoj>s laticeps it is fairly closely allied to it. Huxley 

 gives reasons sufficient to show that it is at least specifically 

 distinct. The few reasons he gives for regarding it as generic- 

 ally distinct are less conclusive. Brachyops has a broader skiiU, 

 and the eye is placed further forward and more laterally than in 

 Bothriceps^ but in the imperfect state of the specimens no 

 characters of generic importance can be seen to separate the two 

 forms. There may, however, be in association with the anterior 

 portion of the orbit in Brachyops, some differences in i-elations of 

 the lacrimal, or sep to-maxillary, or of the sensory grooves, or 

 in the structure of the palate, which may be sufficient to separate 

 the types into distinct genera, and in the meantime Bothriceps 

 may be retained as possibly distinct. 



The fio-ure given by Huxley shows the sutures as preserved in 

 the specimen. The new figure I give represents a restoi'ation 

 of the skull. As, however, every element of the upper side of 

 the skull is shown on one side or the other, there is no element 

 in any doubt, and the only sutures concerning which there is any 

 doubt are indicated in dotted line. 



The following are some of the more interesting points in the. 

 structure of the skull. The lacrimal is small, and nearly extends 

 from the orbit to the nostril, but does riot reach the border of 



