1900.] Osborn, Phytogeny of the Rhinoceroses of Europe. 245 



ing over premaxillaries, with smooth surfaces (this length, slender- 

 ness, and smoothness is also a female character in C. occidentalis 

 and C. tridactytits) ; a sagittal crest, occiput high and narrow. 

 (5) Another skull (loc. Pyremont between Lyons and Geneva) has 

 the same general characters but the nasals exhibit distinct and 

 quite well marked rugosities at the sides of the tips ; this is 

 evidently a ?naie ; the digits are somewhat shorter than in A. 

 lemanense, namely, Mtc. 111= 140, Mts. 111 = 125; Deperet 

 regards the animal as a distinct species and will describe it as 

 such. Munich : (i) The maxilla from Eselsberg, Eckingen, 

 near Ulm, is beautifully preserved ; it belongs to an earty stage 

 because the premolar crests are bridged and unite when worn ; 

 the premolars exhibit medifossettes ; the molars show the strong 

 crochet, antecrochet, and metaconule folds. (2) An unworn 

 molar from Eckingen shows a crista, antecrochet, and crochet, 

 and the characteristic small protocone of this species. Stutt- 

 gart : (i) Molars of a tater stage (Eggingen, Ulm) show a more 

 prominent crista and crochet which unite to form a medifos- 

 sette. (2) A fine pair of lower jaws (Ulm) with large lower 

 canines and no traces of pm i probably also represent a later 

 stage ( /'. e., Lower Miocene). 



We thus find that^^. lemanense is the characteristic Upper Oligo- 

 cene species, presenting various stages of premolar transforma- 

 tion and probably giving rise to some collateral species. 



3. Lower Miocene Stage. 

 Sables de V Orle'anais, Royans. 



A. platyodon Mer?nier, represents this stage. — Lyons : The 

 type skull, probably belonging to a small female, pm^-m^ = 207, 

 exhibits unique, extremely elongate, slender, and slightly separate 

 nasals ; the lower canines, as the specific name indicates, are ex- 

 cessively flattened toward the extremities but exhibit a triangular 

 mid-crown section ; the premolars (Mermier, '96, PI. II) have a 

 prominent crista and medifossette ; the crests unite early upon 

 wear. The teeth may be readily distinguished from those of the 

 contemporary Brachypodinee by the small size of the protocone. 



A. blanfordi Lydekker. — A jaw is ascribed to this species 



