48 Mamm . 
MAMMALIA. 
Gaudry, A., & Boule, M. Mat6riaux pour l’Histoire des Temps 
Quaternaires. Fasc. iii — L ’Elasmotherium. Pp. 83-104, pis. xvi-xix. 
Describes and figures a nearly entire skeleton of Elasmotherium 
8ibiricnm in the Paris Museum [see Zool. Rec. xxiv, Mamm. p. 42], and 
shows that its characters are essentially Rhinocerotic. The dentition of 
Rhinoceros antiquitatis ( tichorhinus ) is figured on pi. xvii, for comparison. 
t Rhinoceros antiquitatis ( tichorhinus ) : dentition figured by A. Gaudry 
& M. Boule (op. cit .), pi. xvii. 
t Rhinoceros sansaniensis : recorded by M. Vacek (suprch o. 21) as dis 
tinct from R. schleiermacheri. 
t Elasmotherium sibiricum, vide Gaudry & Boule, op. cit. 
h . Titanotheriiile (= Menodontid^e). 
0. 0. Marsh, Rep. Brit. Ass. 1888, pp. 706 & 707, has notes on the 
skeleton of Brontops robustus. 
l . Chalicotherudje. 
In Am. Nat. xxii, pp. 728 & 729, H. F. Osborn notices a remarkable 
discovery by H. Filiiol, showing that the phalangeals on which the sup- 
posed Edentate genus Macrotherium was founded really belong to Chalico - 
therium. It is concluded that the latter genus must remain in the 
Perissodactyla, among which it must be regarded as an aberrant form 
allied to the American Palceosyops. 
m . Macraucheniid.e, 
t Macrauchenia formosa , d. sp., F. P. Moreno, Bol. Mus. La Plata, 1888, 
p. 13, Tertiary, S. America. 
t Macrauchenia intermedia , n. sp., Moreno, t. c. p. 14, Tertiary, S. 
America. 
VI. ARTIODACTYLA. 
Bonnet, R. Ueber die Entwicklung der Allantois und die Bilaung des 
Afters bei den Wiederkauern und fiber die Bedeutung der Primi- 
tivriune und des Primitivstreifs bei den Embryouen der Siiuge- 
tiere. Anat. Anz. iii, pp. 105-126, woodcuts. 
An elaborate paper on the development of the allantois and the forma- 
tion of the anus in the Ruminauts, concluding with a general discussion 
on the primitive streak and primitive groove in Mammals generally. 
Boulart, B. Note sur le Placenta du Cervus mexicanus. C.R. So<L 
Biol. (8) v, p. 422. 
In this paper the author proposes to divide the Pecora as follows, 
viz. : — 
1. An acotyledonous or diffuse placenta — Camelulce , Tragulidie. 
2. An oligocotyledonous placenta — Gervidce (incl. Moschus). 
3. A polycotyledonous placenta — Giraffidce, Bor idee. 
