18 Mcmm. 
MAMMALIA. 
[Retterer, E.] Origine et Evolution des Amygdales chez les Mammi- 
feres. J. de l’Anat. Phys. xxiv, pp. 1-80 & 274-360, pis. i, ii, xii, & xiii. 
This memoir treats in great detail of the origin and development of 
the tonsils in different Mammals, giving at the conclusion along summary 
of the author’s conclusions. 
Rex, H. Beitrage zur Morphologic der Saugerleber. Morph. J.B. xiv. 
pp. 517-617, pis. xx-xiv. 
An elaborate contribution to the study of the structure and morphology 
of the Mammalian liver, with illustrations showing the homology of the 
various lobes, and the distribution of the vascular system in different 
groups. 
Riviere, E. Sur la Faune a les Osseraents Humains des Baumas de 
Bails et de la grotte Saint-Martin (Alpes Maritimes). C.R. eviii, 
pp. 763 & 764. 
Records remains of various species of Mammals found in association 
with those of Man. 
c Rodler, A. Verbreitung und Geschichte der Seesaugethiere. Vienna : 
1888. 
A summary of the history of the Pinnipeds, Sirenia, and Cetacea , with 
an account of their present distribution. 
Roth, S. Boobachtungou iibor Eiistchung und Altor dor Pampasfor- 
ination in Argentinien. Z. geol. Ges. xl, pp. 375-464. 
Discusses the ages of the various ossiferous deposits of Argentina, giving 
lists of the species of Mammals obtained therefrom. 
Rudinger, N. Ueber die Abflusskanale der Endolymphe des inneren 
Ohres. SB. bayer. Ak. 1887, pp. 455-476, pis. iii-v. 
Describes and figures the general relations, histology, and development 
of the ductus endolymphaticus, or aquaeductus vestibuli ; the illustrations 
being chiefly taken from the Gat. 
ROtimeyer, L. Ueber einige Beziehungen zwischen den Saugetliier- 
stammen Alter und Neue Welt. Abh. schw. pal. Ges. xv, 63 pp., 1 pi. 
The first section of this memoir is devoted to a general discussion of 
the principles of classification, and more especially as regards Ungulates ; 
while the second describes Mammalian remains from the Swiss siderolites, 
which afford additional evidence of the close relationship existing between 
the faunas of the Old and New Worlds, some of the former being described 
as new species. In the first part it is considered that Cope has laid too 
much stress on carpal and tarsal structure in his classification of the 
Ungulates, and that the Condylarthra cannot be regarded as a group of 
equal value with thg Diplarthra ( Perissodactyla -f- Artiodactyla). The 
upper molars of the Condylarthra are termed Trigonodont, while the 
.name Zygodont is proposed to include both the Lophodont and Selenodont 
types of the more specialized Ungulates. In the second part the forms 
described comprise Ccenopithecus , Adapis t Phenacodus , Protogonia ) and 
Meniscotheriurn ( errorini Meniscodon) ; especial attention being directed to 
the importance of the occurrence of Phenacodus in Europe in relation to 
