MAMMALIA. 
13 
Second Subclass PISCEFORM MAMMALIA. 
1. Sirenida3. 2. Cetacea. 
Third Subclass IMPLACENTARIA. 
1. Marsupialia. 2. Monotremata. 
'“^Also Prof. Carus/ih his Handbook of Zoology (see p. 3), 
adopts ernbryoiiie conditions as principal characters for classifi- 
cation. In the following outline of the system adopted by him, 
the position assigned to the Lemurs deserves special atten- 
tion : — 
A. MONODF^LPIIIA. 
I. Deciduata. 
* Unguiculata. 
a. Jdiscoplacentalia. — 1. Primates. 2. Chiroptera. 3. Insectivora. 
4. Rodentia. 6. Prosimii. 
b. Zonoplacentalia. — 6. Carnivora. 7. Pinnipedia. 
** TJmjulata. — 8. Lamnungia. 9. Proboscidea. 
II. Inbeciduata. 
* Ungulata. — 10. Artiodactyla. 11. Perissodactyla. 12. Natantia. 
** Ungidculata. — 13. Bruta. 
B. BIDELPIIIA.— 14. Marsupialia. 
C. ORNITHODELPIIIA.— 15. Monotremata. 
d According to the ‘Report of the Council of the Zoological Society of 
London ’ (London, 1808), 531 Quadrupeds were living in the Menagerie in 
the course of tlie year 1807, and 25 species have bred in this establishment 
during the same time. 
>/Mr. ScLATER has given a list of the different species of Mammals that 
have bred in the Menagerie of the Zoological Society of London during the 
past twenty years, and the number of instances in which each species has 
produced living young during the same period. Altogether 105 species bred 
in 499 instances, the proportion of breeding species to total number being 1 
in 3 2. Proc. Zooi. Soc. 1808, pp. 023-020. 
V Talaiarctic Region. Although Prof. v. Brandt’s researches into the deve- 
lopment of the Mammalian Fauna of Northern Asia and Europe refer chiefly 
to prehistoric periods, and consequently do not fall within the limits of this 
Record, they are of so great an interest that we feel bound to draw attention 
to them by the following brief notice : — The author states his views on the 
subject at the end of his Zoogeogr. und False ontol. Beitr. pp. 248-256. From 
a comparison of the remains of the Mammalian Faunas of the Tertiary and 
Quaternary periods in Europe and Northern Asia, it is evident, or at least 
very probable, first, that Northern Asia, in the Tertiary period, was inhabited 
by its present fauna, which, however, then comprised several forms now ex- 
tinct; secondly, that the Quaternary Fauna of Europe was the result of an 
immigration from Northern Asia. There is at present no evidence whatever 
that man existed in the T(U’tiary period ; but it is not probable that the whole 
of the Quaternary Mammalian fauna preceded the origin of man, as has been 
generally supposed hitherto, because the conditions of the Tertiary period were 
already favourable to his existence. The author enters, then, into an investi- 
