622 SCIENCE PROGRESS 



of Baluchistan and A. schlosseri of the Miocene of Samos, with 

 both of which it agrees in its extremely short-crowned molars. 

 Indeed, its resemblance to the latter is so close, that it probably 

 belongs to the same species, as also does another skull from 

 the Odessa neighbourhood previously described by Prof. 

 Niezabitowski as Teleoceras ponticus. 



In another communication {Bull. Amer. Mns. Nat. Hist. 

 vol. xxxii. pp. 261-74, 191 3) Prof. Osborn shows that a 

 skull from the Eocene of Wyoming, described by the late 

 Prof. E. D. Cope in 1884 under the name of Triplopus amarorum, 

 does not belong to that rhinoceros-like genus at all, but is a 

 member of the Chalicotheriidce, or perissodactyles with edentate- 

 like claws, of which it is the earliest known representative. 

 It is now made the type of the new genus Eomoropus, 

 and regarded as a specialised offshoot from the stock which 

 gave rise to the titanotheres, on one hand, and to the fore- 

 runners of the horse-group on the other. For many years 

 American palaeontologists regarded the Chalicotheriidce as the 

 representative of a distinct subordinal group, the Ancylopoda, 

 of equal rank with the Perissodactyla, but they are now classed 

 as a family of that suborder. 



The next paper for mention is one by Mr. Ivar Sefve, who 

 recently made an expedition to Peru and Bolivia for the purpose 

 of collecting fossil bones, on a new species of Macrauchenia from 

 Ulloma, in the country last named. The paper is published 

 in vol. xii. (pp. 205-56, pis. xiv.-xviii.) of the Bulletin of the 

 Geological Society of Upsala. Macrauchenia, it may be recalled, 

 was a half camel-like, half horse-like, three-toed ungulate, the 

 remains of which were originally discovered by Darwin in 

 Patagonia, where they had been weathered out from the super- 

 ficial deposits. Long included in the Perissodactyla, it is now 

 regarded as the typical representative of a distinct South 

 American subordinal group, the Litopterna. The skeleton of 

 the Bolivian species — M. ullomensis — exhibits several structural 

 peculiarities, notably in the pelvis, which is very strongly 

 welded in an unusually complex manner with the vertebral 

 column ; the sacrum being also remarkably stout and massive. 



Although detached skulls, teeth, and bones of the American 

 mastodon {Mastodon americanus, or Manumit americanum, as it 

 is now designated in its native country) are abundant enough 

 in the superficial deposits of the United States, entire skeletons 



