6i6 SCIENCE PROGRESS 



mammals with dinosaurs in the Cretaceous Notosty lops-beds is 

 confirmed, and the author's theory of a former " Archelenis" 

 connecting Brazil with West Africa is reviewed. The remark- 

 able suggestion is made that ground-sloths (which would almost 

 of necessity likewise imply true sloths and ant-eaters) and 

 glyptodonts, in place of being autocthonous South American 

 groups, really came from Asia by way of " Archigalenis," a 

 land-bridge connecting Eastern Asia with Central America. 



Intimately connected with the above is a memoir occupying 

 the whole of vol. xxv. of the An. Mus. Nac. Hist. Nat. Buenos 

 Aires, and dealing with the mammalian fossils of the Tertiary 

 Araucanian formations of Argentina, as specially represented 

 by those of Monte Hermoso and the Rio Negro. The author, 

 Sefior Ca3^etano Rovereto, records a large number of species, 

 many of which are described as new, and likewise names several 

 new genera. Most, at any rate, of the species belong to types 

 already familiar through the works of the late Dr. F. Ameghino, 

 Dr. W. B. Scott, and others ; and it may be a question whether 

 some, at least, of the generic types described as new are not 

 based on trivial characters or on those due to immaturity. 

 Several new generic names are also proposed for large extinct 

 birds, two of these, Hermosiornis and Procariama, being re- 

 garded as the representatives of a family, Hermosiornidce (or, as 

 it should have been termed, Hermosiornithidce), allied to the ex- 

 isting Brazilian seriema, while a third, Prophororhacus, is referred 

 to the extinct Phororhacidce, as represented by Pkororhacus, one 

 of the most gigantic and at the same time the biggest-headed 

 bird that ever stalked over this earth. A few land-tortoises and 

 other reptiles are also referred to, and in some cases named. 



An important contribution is made to our knowledge of the 

 recently discovered Miocene mammal-fauna of British East 

 Africa by Dr. C. W. Andrews in the Quart. Journ. Geol. Soc. 

 vol. lxx. pp. 163-86. 



Reverting to South America, it may be mentioned that for 

 many years past the palaeontologists of the Buenos Aires 

 Museum, following the lead of the late Dr. Florentino Ameghino, 

 have assigned to the Tertiary mammalian faunas of the country 

 a much greater age than appears to be indicated by their relative 

 degree of evolution and various other factors. As there appears 

 to be evidence of the presence of man among the more recent of 

 these faunas, one consequence of this putting-back of the palae- 



