18 SCIENCE PROGRESS 



European Triassic Cotylosauria are discussed by Prof, von 

 Huene in the Paloeontographica, vol. lix. pp. 69-102, pis. v.-ix. 

 Telerperton and Sclerosaurus are referred to this group ; the 

 former, which has very generally been classed among the 

 Rhynchocephalia, being regarded as a near relative of the South 

 African Procolophon. A new genus and species, Koiloskiosaurus 

 coburgense, is established on the evidence of a skeleton from 

 the Bunter of Coburg. 



Here may be appropriately noticed a paper by Mr. D. M. S. 

 Watson (A tin. Mag. Nat. Hist. ser. 8, vol. x. pp. 573-87) on the 

 homology and relationships of the elements of the lower jaw 

 in the mammal-like reptiles. However, the subject is one of an 

 extremely technical nature, which it would be useless to 

 attempt to review without the aid of diagrams. 



Mention may likewise be made of a second paper by the 

 same author (op. cit. vol. viii. pp. 294-330), published in 191 1 but 

 not referred to in my review of that year's work, on the skull 

 of the South African Diademodon, with notes on the same part 

 of the skeleton in other members of the cynodont group. 



A nearly complete skeleton of the South African dicynodont 

 genus long known as Ptychognathus but now termed Lystrosaurus 

 forms the subject of an article by Mr. Watson in the Records 

 of the Albany Museum, vol. ii. pp. 287-95. Lystrosaurus appears 

 to have been of aquatic habits and also to have used its 

 powerful pair of upper tusks for digging. It probably dug with 

 its mouth open, scooping up food with the lower jaw. " It is 

 natural to suppose that Lystrosaurus was a vegetable-feeder, 

 as the absence of [cheek] teeth and the presence of a horny 

 beak are more adapted to such a diet than to a carnivorous one. 

 The extraordinary massiveness of the jaws, however, is rather 

 difficult to reconcile with the softness of most aquatic plants 

 and suggests some additional food." 



To the Annals of the South African Museum, vol. vii. pt. 5, 

 Dr. R. Broom contributes no less than five articles on reptiles 

 of the Trias and Permian of South Africa. In the first of these, 

 after describing a new species of Propappus, he gives reasons for 

 believing that its well-known bigger relative Pariasaurus stood 

 higher on its limbs than is generally supposed. Both these 

 reptiles appear to have been tortoise-like in habits and probably 

 protected themselves by digging in the ground. In the second 

 paper the author describes a new mosasaurian of the genus 



