664 SCIENCE PROGRESS 



certain teeth from the Bugti Hills may indicate an Indian 

 representative of the Fayum genus Moerithermm. 



A short notice must suffice for a paper by Mr. W. Granger, 

 published in the Bull. Amer.Mits. Nat. Hist. vol. xxviii. pp. 235- 

 51, on the Tertiary faunistic horizons of the Wind River basin 

 of Wyoming. Descriptions of several new Eocene mammals are 

 included in the paper, among which the new genus Shoshonius 

 for a member of the Anaptomorphidce may be mentioned. Fuller 

 mention is made later on of the fifth part of Dr. H. G. Stehlin's 

 memoir on the mammals of the Swiss Eocene, published in 

 the Ahh. Schweiz. Pal. Ges., vol. xxxv. pp. 691-837, 1909, to which 

 I had not the opportunity of referring in my review for that 

 year. A reference may likewise be made here to a paper by 

 Dr. M. Boule, Compt. Rend. Ac. Sci. Paris, vol. cl. pp. 812, 813, 

 on certain vertebrate remains from southern Tunisia. 



Turning to systematic work, it is important to refer to a 

 novel classification of so-called tetrapodous vertebrates pro- 

 posed by Dr. O. Jaekel in a paper contributed to the Zool. 

 Anzeiger, vol. xxxvi. pp. 113-24, which to some extent affects 

 mammals. The author adopts the following seven classes, viz. : 

 (i) Mammalia, (2) Paratheria, (3) Aves, (4) Reptilia,(5) Amphibia, 

 (6) Microsauria, and (7) Hemispondyla. The Paratheria are 

 taken to include the monotreme mammals, the more typical 

 anomodont reptiles (in the wider sense of that term), and 

 chelonians. The class as thus constituted is considered to 

 be intermediate between the Mammalia and the Reptilia, but 

 nearer the former than the latter, and containing among its 

 earlier representatives the ancestors of the mammalian line. 

 The author's definition of the class is, with some omissions, 

 as follows : 



So far as known, paratherians are short-limbed, egg-laying 

 vertebrates with a short body, moderately long neck and tail, 

 flattened, clumsy feet, and a covering of horny scales, spines, 

 or hair. The head is depressed, with a small brain, forwardly 

 directed, and for the most part narrow, nostrils, large and 

 laterally directed eyes, and a single or no temporal fossa. In 

 most cases the fore part of the palate is double-roofed, the 

 choanae are mesially united, and the vomer and pterygoids 

 well developed. The dentition may be simple, mammal-like, 

 or aborted ; and the teeth, when present, are generally socketed, 

 with single roots. In the lower jaw the dentary is the dominant 



