18 Ma m m. 
MAMMALIA. 
UNGULATA PERISSODAOTYLA. 
TaP1RIDA5. 
^ Tapirus dowi. Remarks on its specific characters and habitat ; E. R. 
Alston, P. Z. S. 1879, p. 666. T. vialetti : its jaw figured ; E. Chantre & 
— Lortet, Arch. Mus. Lyon, ii. pi. xvi. fig. 2. 
Rhinocerontida!]. 
a 
Brandt, J. F. Tontamen Synopseos Rhinocorotidum vivontium ot fos- 
siliurn. Mem. Petersb. xxvi. No. 5, pp. 66, pi. 
The author proposes the following arrangement : — Legio i. (n.), 
Kynodontes for 3 new subfamilies, Sphaleroceratince (= Dinocerata, 
Marsh), Brontotheri [i\ nee {=. Br onto theridcey Marsh), and Palceotherio- 
dontincG (Hyracoelon, Leidy) ; Legio ii. (n.), Akynodontes^Acy-'], for sub- 
families Rhinocerotince and Hippodantince (or Elasmotheri\i^nce^ . The 
Rhinocerotince are divided into Iloloternnodontes and Colobotemnodontes, 
of which the former are subdivided as Ecornes, Unicornes^ and Bicornes. 
Of the Ecornes, Aphelops, Cope, is queried as a subgenus or section ; a 
similar group, Suhhyracodon, is proposed (p. 30) for various species of 
Aceratherium. Tn the Bicornes, Dihoplus, g. n., p. 48, is characterized 
for Rhinoceros schleiermacheri, Kaup, and R. sansaniensis , Lartet. In 
the Colohotemnodontes, the following new subgenera of Atelodus, Pomel, 
are proposed : — Colohognathus, p. 51 (with sections nn. Dactylochilus 
and Cylochilus), and Meso[r'] rhinoceros. 
Cope, E. D. On the Extinct Species of Rhinoceridee [sic] of N. America 
and their Allies. Bull. U. S. Geol. Surv. v. pp. 227-237. 
Seven genera and 27 species, of which only 6 are living, of Rhino- 
cerontidee are enumerated, Ilyracodon being referred to a separate family, 
Ilyracodontidce. No extinct species of true Rhinoceros has yet been 
found in N. America or Europe, and all American species are without a 
dermal horn. [Cf. also id., Am. Nat. xiii. pp. 771 
•4 Zalahis, g, n. (foss,), proposed for R. sivalensis, 0. & P., from the 
Siwaliks; E. D. Cope, Bull, U. S. Geol, Surv. v. p. 229. 
^Elasmotherium. The characters and affinities of this genus discussed, 
and its osteology figured ; J. F. Brandt, Mem. Petersb. xxvi. No. 6, 
(37 pp. & 6 pis.). It constitutes a subfamily of the Rhinocerontidee, which 
may be called Elasmotheri\J\nee or Ilippodontince. Mandible of E. Jischeri 
figured ; id. 1. c. No. 5. 
Rhinoceros antiquitatis : on a specimen found frozen in E, Siberia ; W. 
Dybowski, Zool. Anz. ii. pp, 375-379. R. leptorrhinus : molar figured : 
E. Chantre & — Lortet, Arch. Mus. Lyon, ii. pi. viii. fig. 6. E. mega- 
rrhinus : its skull and dentition figured ; ibid. pi. xvii. 
llyrachyus imperialis, p. 50, II. inter medius, p. 51, H. crassidens, p. 52, 
