1078 DR. R. BROOM ON NEW PERMIAN 



the upper teeth. The molars are better developed than in 

 u3S. tvhaitsi. 



The arrangement of the bones round the nostril is similar to 

 that in Scylacosaurus and Aloposauriis. 



ICTIDOGNATHUS PARVJDENS, gen. et sp. n. (PI, LXII, fig. 5, & 

 P], LXIII, fig. 11.) 



This new genus is founded on a small snout found by me at 

 Kuilspoort. It is, with the exception of Scaloposaurus constricius, 

 the smallest known Therocephalian, 



From the snout to the orbit measures 46 mm,, and the whole 

 skull was probably not more than 90 mm. in length. 



Owing to the weathering of the fossil, which w^as found in a 

 sloot and was thus considerably water-worn, the front of the 

 snout is badly preserved and the teeth are very imperfect. There 

 appear to be six incisors, all of small size. There is a fair-sized 

 canine wdth a very minute 1st canine in front of it. The molars are 

 numerous. Eight are preserved and two are probably lost, possibly 

 three. The dental formula would thus appear to be i.-, c. , 7n. -• 

 The dental formula of Scaloposaurus was recently given by me as 

 i.-,c.-, on.-, the reason for believing that there are three canines 

 being that the maxillary series begins with one minute tooth followed 

 by two larger than any of the succeeding molars. If we regard the 

 third tooth as a molar, the dental formula becomes the same as in 

 Ictidognathus. But though the dental formulae may be the same, 

 there is no question but that the species must be placed in separate 

 genera, the large canine in the present specimen sufficing to remove 

 it from Scalo2)osaurus. The canine measures antero-posteriorly 

 3 mm. 



Eriphostoma microdon, gen. et sp. n. (PI. LXIII, fig. 12.) 



This small impei'fect skull was found by Mr. Whaits at 

 Fraserburg Road. It is in two portions — a rather badly weathered 

 snout, and an equally badly weathered occipital portion. Though 

 the contact is missing, the two fi-agments can be united with fair 

 accuracy, and the whole skull as restored measures 110 mm. in 

 length. The snout is very flat and deep, measuring in the 

 canine region 27 mm, in greatest width, though the snout with 

 the lower jaw here measures 55 mm. in depth. 



The incisoi-s are long, narrow pointed teeth which are situated 

 well to the front, and are apparently only 4 in number. Following 

 the last incisor is a long diastema of 13 mm. corresponding to the 

 position of the large lower canine. The canine measures 4"5 mm, 

 in antero-posterior length. The number of molars is imcertain. 

 Two only are preserved, and these are long, pointed, slender teeth. 

 The number of molars must, however, have been few, 



' The only genera to which Eriphostoma is nearly i-elated are 

 Ictidosaurus and Lycoscmrus. Ictidosaurtcs angusticeps, the only 

 known species, was described by me in 1903 from a specimen in the 

 South- African Musevnn. Lycosaurus was founded by Owen on 



