NEW FOSSIL REPTILES, 863 



Scymnognathus may prove to be related to Scyvmosauras. 

 The dental formulfe are practically the same in the two genera, 

 but Scymnosaurus seems to be a higher type of Therocephalian, 

 and the shape of the snout and lower jaw differs sufficiently 

 markedly to justify one in keeping the genera distinct. 



^LUUOSAURUS STRIATIDENS, sp. n. (PL XCI. fig. 7.) 



The imperfect snout which forms the type of this new species 

 was discovered by me at Kuilspoort, near Beaufort West, at a 

 horizon which is probably 500 feet above the town. 



It is a smaller species than jE.felinus, and in addition differs 

 from this and the other known species in the relatively small size 

 of the teeth, in the feeble development of the seri-ations, and in the 

 incisors and canine having feeble vertical ridges on the enamel. 



So far as preserved there is a pretty close agreement in the 

 structure of the bones of the snout with those of previously 

 described species. The septomaxillary is larger than usual. The 

 mandible has a broad angular chin. 



The incisors are small, rounded, pointed teeth, placed so near 

 each other as to be almost touching. Those whose crowns are 

 preserved (Si-d, 4th, 5th) have the enamel folded into about half 

 a dozen vertical corrugations. The 5th tooth has fine serrations 

 on its posterior edge. The space occupied by the five incisoi's is 

 16 mm. The diastema between the 5th incisor and the canine is 

 7 mm. 



The canine is long and slender. The base measures antero- 

 posteriorly 7 mm. and the height of the crown as preserved is 

 14 mm. It originally probably measured about 20 mm. The 

 molars are small with only faint indications of posterior serrations. 

 Two are well preserved and there are remains of the other two. 

 Probably 5 is the complete number, which would make the dental 

 formiala agree with the other species of -^Elurosaurus. The four 

 preserved molars measure 10 mm., and the front one is only 9 mm. 

 behind the canine. 



Pristerognathus platyrhinus, sp. n. (PI. XCI. fig. 8.) 



The specimen which I take as the type of this new species is an 

 imperfect snout found by Mr. Whaits at Grootf ontein , about 12 

 miles to the west of Beaufort West, and probably from the upper 

 part of the Fareiasaurtcs-Zone. The specimen consists of the 

 front half of the skull. It is broken into three pieces and the 

 upper nasal region is missing. The matrix is extremely hard and 

 difficult to clear off, but most of the characters can be satisfactorily 

 made out. 



In the large majority of Therocephalians the snout is deeper 

 than broad. In this specimen the snout is broad and flat, and the 

 lower jaw comparatively straight and with very little of the usual 

 upcurving in the canine and incisor region. The widest part of 

 the snout is immediately above the canine, where it measures 

 55 mm., and on the same plane the height of the snout is 40 mm. 



