NEW FOSSIL REPTILES. 873 



foramina, while two more are near the anterior end of the bone. 

 As there is no single large supra-maxillary foramen, it is probable 

 that all these small foramina a,re for branches of the maxillary- 

 nerve. The canine is long and slender. It is ridged somewhat 

 after the manner of the canine of the cat. Behind it are 6 molars. 

 The 1st is small, pointed, and without any cusps. The 2nd, 3rd, 

 4th, and 5th all closely resemble one another. There is a large 

 pointed median cusp and a small anterior and posterior cusp. 

 While essentially similar in type to the molars of Nythosaurus 

 they differ in that the anterior and posterior cusps are relatively 

 smaller. The 6th molar is a small tooth, and unfortunately the 

 crown has been lost from both sides of the skull. 



The incisors measure about 6'5 mm. Behind the last incisor 

 is a diastema of 4 mm. The canine measures antero-posteriorly 

 about 2°5 and its height is 7 mm. At a distance of 1'5 mm. 

 behind the canine is the 1st molar, and the whole series of six 

 occupies the space of 13 mm. 



Only a small fragment of the septo-maxillary is preserved, but 

 it manifestly forms part of the face, and was probably as in 

 Nythosaurus. 



The nasal is moderately wide in front, but narrows on passhig 

 backwards, and then near its middle it becomes about twice as 

 wide as in front. Round the bone near where it meets the 

 maxilla is a series of three or four foramina. 



The lachrymal forms the front of the orbit and, as in Xyiho- 

 sauriis, it is larger than the prefrontal. 



As in Nythosaurus and most Cynodonts the prefrontal meets 

 the postorbital, shutting out the frontal from the orbital margin. 

 The postorbital forms about half of the postorbital arch and 

 overlaps a small part of the parietal. 



The parietal is large, and there is an obvious pineal foramen. 



The squamosal is like that of Nythosau^-us, except that in 

 Ictidopsis there is a much more prominent auditory groove. 



The fractured edge of the occipital crest shows the intei-parietal 

 distinct from the parietals, and the lateral bone, which I believe 

 to be the opisthotic, distinct from the parietal, the interparietal, 

 and from the squamosal. 



The occiput and palate have not been cleared. 



The dentaries are in position, but the posterioD bones of the 

 jaw have been detached and displaced, probably by insects before 

 the skull was fossilized. 



The type of Ictidopsis elegans was found at Harrismith in association 

 with Lystrosaurus. Unfortunately the geology of Harrismith is 

 unknown. Some of the first specimens of South- African Dinosaurs 

 were got there by Mr. J. M. Orpen in 1853, and there can be no 

 doubt that these are from the Red Beds of the Stormberg Series. 

 It is not a little startling to find tha.t the same commonage 

 yields fossils which in Cape Colony belong to a horizon about 

 3000-4000 feet lower than the Red Beds. Probably the Molteno 



