44 Mamm. 
MAMMALIA. 
geological and geographical distribution of Elephas antiquus ; while the 
second section is devoted to the dentition and craniology of that species. 
A remarkable genealogical table is given on p. 257, in which all existing 
Ungulates and the Sirenians are derived from a hypothetical, and perhaps 
Cretaceous, ancestor, for which the name Prototapirus is proposed, the 
Hyracoidea , Perissodactyla , and perhaps the Dinotheriidce , being directly 
derived from this type ; while an intermediate form termed Hydrotapir us 
is provisionally suggested for the direct stock of the Sirenia, and a 
second, under the name of Hyolapirus , for that of the Artiodactyla and 
Elephantidce. 
t Eleplias primiyenius : J. A. Brown, P. Geol. Ass. x, pp. 3G 1-372, 
records remains associated with flint implements at Southall. See also 
Geol. Mag. (3) v, pp. 317-319. 
t Elephas americanus : molar from silicified beds of coral in Florida, 
recorded by H. T. Woodman, Tr. N. York Ac. vi, p. 59. 
t Elephas meridionalis , var. trogontherii : a molar from Seville, in Spain, 
described by H. Pohlig, SB. Niederrhein. Ges. 1888, p. 19, and SB. Yer. 
Rheinl. p. 19. 
Elephas a/ricanus : a large tusk exhibited by E. G. Loder, P. Z. S. 
1888, p. 87. 
t Mastodon bonariensis, n. sp., F. P. Moreno, Bol. Mus. La Plata, 1888, 
p. 18, Tertiary, S. America. 
II. AMBLYPODA. 
Cope, E. D. On the Mechanical Origin of the Teeth of the Amblypoda. 
P. Am. Phil. Soc. xxv, pp. 80-88, woodcuts. 
Proposes terms for the different methods by which mastication is 
accomplished in various groups; aud then suggests a theory to account 
for the type of dental structure occurring in the Amblypoda. 
III. HYRACOIDEA. 
a. Hyracidac. 
Dendrohyrux emini [Zool. Rec. 3 xiv, $£amm. p. 39], figured by 0. 
Thomas, P. Z. S. 1888, p. 15, pi, ii. 
Dendrohyrux dorsalis , figRred by F, A. Jentink, Notes Leyd. Mus. x, 
pi. iv (lettered stampjlii). 
IV, CONDYLARTHRA. 
U. PERIPTYCHIDAi. 
+ Haploconus corniculatus , n. sp., E. D. Cope, Tr. Am. Phil. Soc. xvi 
p. 349, Puerco Eocene, U.S.A. 
fPeriptychus brabensis, n. sp., Cope, t. c. p. 354, ibid. 
