Botany and Zoology. | 143 
of Me America. It contains the technical descriptions of 3 families, 
species, remarks necessary to show their places in the system, 
their cei, ts and “an enumeration of all the different specimens col- 
Other volumes will be devoted to the zoology of the separate 
expeditions, and enter more into particulars concerning habits, manners, 
& 
history, “ when the mere indication of the continent whence an animal . 
bee 
‘ee 
“have an opportunity of ascertaining closely the particular circums 
under which the animals they describe are placed in their natural home, 
are guilty of a gross dictegurt to pth interests of science es 
this neglect ; every new fact relating to the geographical distribution ae 
well-known species is as important: to science as the discovery of a 
cies.” 
To this volume there are likewise attached indices of the particular 
localities soelisione d, of the authorities referred to, of local names and of 
: scientific names,—a all most useful and valuable appendages t to the work. 
4 The total number of species of Mammalia now recognized by Professor 
tac, Ponda mi poe none 
The first two of Soeuee can hardly, “se said to elon to 
the trod a of ‘North America; but we must allow for the 
Chiroptera, to arrive at the true number of North American ame 
> — the only modern es on North aie hg mentions 
species only as recognized by himself. This, however, raises the = 
number of positively recognized Mammalia belonging to. = fe 
ican roe to 235, ——— Pinnipeds ai 
Baird’s dasa we have first the Znsectivora, containing Shre ws and 
Moles,—together 26 species. Among these is a ate seaantienble (; (it re- 
- liable) addition to the American fauna in the shape of a second species 
of Urotrichus, a genus of Talpide hitherto embracing but one member, 
as, a ss ‘ ‘2 Ke ti 
she Kastivors the 5 oan number of 46 are ee Pe North 
American, made up of 9 Fede, 8 Canide, the Bassaris astuta of Mee 
