376 Rerieics — Dr. Anton Fritach — Permian Fauna of Bohemia. 



maxillaries. In the anterior third of the vomer is a single strong 

 tooth with a small tooth behind it. The palatine is imperfectly 

 preserved. The slender anterior part which is alone known has a 

 single furrowed tooth as large as those in the premaxillary. The 

 pterygoid is also badly preserved : there are traces of denticulation 

 on its hinder border. The parasphenoid is remarkably small, with 

 the shield deeply notched on each side and the median spine short. 

 The anterior half of the shield shows close-set marks of attachment 

 for small denticles. 



Dendrerpeton foveolatum has a shorter and broader skull. The 

 bones of the head are marked with punctations as though made 

 with a needle. The lower jaw appears to carry 30 teeth, with a 

 large tearing tooth in front. 



Dendrerpeton deprivatiim is known from a skull five centimetres 

 long, which is nearly as long as broad, and triangular in form. The 

 orbital circles are one and a half times their diameter apart, and in 

 the middle of the skull. The upper bones of the head are pitted with 

 little holes, which, when magnified, resemble those of the crocodile, 

 but there are also more minute pittings on the elevated interspaces. 

 On the hinder border of the orbit the post-orbital bone shows a porous 

 character. An extra bone occurs between the post-frontal and 

 squamosal, and is regarded by the author as a dismemberment of 

 the squamosal. The parietal bones are relatively long, and reach 

 forward to between the middle of the orbits. 



The family Diplovertebrid^ includes amphibians of similar 

 aspect to Dendrerpeton, with caudal vertebras which consist of two 

 segments, the anterior of which carries the neural arch and the ribs, 

 while the posterior part is merely a similar vertebral body without 

 processes. The skull-bones are not pitted, and their only ornament 

 is radiating lines on each bone. This type is only known from one 

 species, which was about half a metre long. 



Diplovertehron punctatum. The skin was defended on the abdominal 

 surface by long scales, but there is no proof that the back was 

 armoured. The premaxillary bone carried five curved teeth. They 

 are twice as long as broad. There are 23 teeth in the maxillary 

 bone, and the first two are rather stronger than the others, which 

 show no decrease in height as they extend backward. They are 

 three times as long as wide, and distinctly furrowed in the lower 

 third. In the lower jaw the teeth are much smaller, and number 44. 

 The first seven are the longest, and the third tooth is the strongest 

 in the lower jaw. In both jaws the teeth seem to have an alter- 

 nating arrangement, so as to be approximately in two parallel rows. 

 The vertebrae have the bodies but very slightly cupped. The author 

 accounts for the double bod}' by supposing that the inter- vertebral 

 portion of the notochord has persisted and become separately 

 ossified. The accessory centrum is as large as the principal centrum. 

 The ribs are thin and angularly bent in their upper third ; in large 

 specimens both capitulum and tuberculum are seen. The pelvic 

 girdle is well developed. 



The author is uncertain whether the Archaegosauridse is represented 



