12 Mamm. 
MAMMALIA, 
O’R killy, J. P. [See Canidw.] 
Osborn, H. F. A Review of the Cernaysian Mammals. P. Am. Phil. 
Soc, 1890, pp. 51-62, woodcuts. 
The author endeavours to assign a definite position to the numorous 
Mammals described by Lemoine, from the Lower Eocene of Rheims. In 
noticing the general characters presented by this fauna, it is mentioned 
that the teeth are usually tritubercular, and that the astragalus is per- 
forated. The genera, Protoadapis and Plesiadapis are referred to the 
primitive Lemuroids. Schlosser’s reference of Adapisorex, Adapisori- 
culuSy Pleuraspidotherium , and Orthaspidotherium to the Insectivora is 
confirmed ; although the alleged relationship of the two latter to the 
Erinaceidce is disputed. In the Creodont Carnivora Hycenodictis is pro- 
visionally referred to the Mesonychidcc, while the tritubercular character 
of the molars of Arctocyon is pointed out for the first time. The paper 
concludes with a notice of Neoplagiaulax. 
. [See also Scott, W. B.] 
Otto, A. Sur Geschichte der iiltesten Haustiere. Breslau: 1890, 8vo, 
78 pp. 
A history of the domestic Mammals of Europe, divided into two parts. 
The first part gives a resumi of previous works and theories on the sub- 
ject ; while in the second we have a detailed account of each particular 
species. 
Ou demans, A. 0. [See Cercopithecidcc.'] 
Oudemans, J. T. [See Chiromyidce.l 
°Paladino, G. Dei Primi Rapporti tra l’Embrione e l’Utero in Alcuni 
Mammiferi. Giorn. Assoc. Nat. Nap. i, pp. 1-15, pi., 1889. [See 
also Monit. Zool. Ital. i, p. 12.] 
Observations on the relations of the foetal and maternal elements of 
the placenta, as exemplified in Rodents. 
Panasci, A. [See Fusari.] 
Parker, W. K. [See Equidce.] 
Paterson, A. M. On the Fate of the Muscle-plate and the Develop- 
ment of the Spinal Nerves and Limb-Plexuses in Birds and Mammals. 
Stud. Biol. Lab. Owen’s Coll, ii, pp. 103-122, pis. vii & viii. [Reprinted 
from Q. J. Micr. Sci. 1887.] 
. The Development of the Sympathetic Nervous System in 
Mammals. P. R. Soc. xlvii, pp. 19-23. [Abstract.] 
It is concluded that the Mammalian sympathetic is mesoblastic, that it 
is formod out of the cellular tissue surrounding the embryonal aorta, and 
is at first entirely independent of the cerebro-spinal system. It is 
primarily uniform and unsegmented. Subsequently it becomes connected 
with certain spinal nerves by growths from the latter, and in con- 
sequence becomes gangliated in an irregular manner. 
