40 Hamm. 
MAMMALIA. 
Bonnet, R. Die Eihaute des Pferdes. Anat. Anz. — Yerh. Auat. Ges. 
3tor Yersamml, 1889, pp. 17-38, figs. (1889). 
A memoir on the foetal membranes of the Horse. 
Burmeister, H., An. Mus. B. Aires, iii, pp. 468 & 469, has supplemental 
notes on the fossil Equidce of Argentina. 
Flower, W. H. The Horse : a Study in Natural History (Modern 
Science Series). London : 1891, 12mo, 196 pp., illustrated. 
A semipopular account of the Horse, its position in the animal king- 
dom, and its nearest living and extinct relations. 
Pavlow, (Madame) M. Notice sur VHipparion crassum du Roussillon. 
Bull. Mosc. 1891, pp. 161-164 ; and Qu’est-ce Que C’est Que 
Ju Hipjparion, t. c. pp. 410-414. 
In the first paper the author points out that some of the specimens 
referred to the species named really belong to Equus } and also alludes to 
her own views that Hipparion is not a direct ancestor of Equus. The 
latter subject forms the basis of the second paper. 
^ t Onohippus muhizi , n. g. & sp., F. P. Moreno, Rev. Mus. la Plata, ii, 
p. 65, Tertiary, Argentina. Identified by H. Burmeister, An. Mus. B. 
Aires, iii, p. 470, with Hippidium. 
U . fPALASOTHERIIDiE. 
For Mesohippus , see Scott, supra , p. 16. 
o. Rhinocerotidj:. 
Rhinoceros hicornis : F. E. Beddard & J. Murie, P. Z. S. 1891, pp. 
246 & 247, have notes on the cause of death of a specimen in the Zoo- 
logical Society’s Gardens, which had lived there since 1868. 
Rhinoceros sumatrensis : E. Bartlett, t. c. pp. 654 & 655 has obser- 
vations on Bornean specimens, with figure of the horns. 
p. tLAMBDOTHERIlD^. 
Earle, C. Preliminary Observations upon Palceosyops and Allied 
Genera. P. Ac. Philad. 1891, pp. 106-117, woodcuts. 
It is proposed to divide the group as follows, viz : — 
I. Last upper molar with one inner column. 
a. Outer columns of upper premolars separated. — Palceosyops. 
B. Outer columns of upper premolars straight. — Telmatotherium. 
II. Last upper molar with two inner columns. — Limnohyops. 
One new species of Palceosyops described. 
f Palceosyops minor , Earle, P. Ac. Philad. 1891, pp. 112 & 113 ; 
j- megarhinus, Earle, Am. Nat. xxv, pp. 45-47, fig. : Mid. Eocene, 
Wyoming : n. spp. 
