1897] NOTES AND COMMENTS 301 
lodges are situated in still water, and there the animal must itself 
convey the logs, holding them between its fore paws, while swim- 
ming solely by the hind legs. The construction of a lodge occupies 
at least two years, and it is repaired annually. It is usually 
elongated in shape, rarely round or conical, and it is always far dis- 
tant from its nearest neighbour. Numerous burrows are made in 
the bank of the river near the lodge, but rarely in connection with 
it. They seem to be inhabited chiefly by young individuals, and 
they are the first refuges formed by the beaver at any spot where it 
has decided to settle down and build. 
As to the inhabitants of a lodge, Prof. Collett thinks that only 
one pair with their latest young occupy each. The older litters 
either migrate or occupy the neighbouring burrows. 
> 
Tue FISHES OF THE NorTH ATLANTIC 
WE have also been favoured by Prof. Collett with a copy of his 
handsome memoir on the fishes collected by the Prince of Monaco 
on his yacht the Hirondelle during the years 1885-1888, which is 
one of the most important contributions to Ichthyology of the last 
decade.* It is published in the sumptuous style with which the gener- 
osity of the Prince of Monaco has nowmade us familiar,and the illustra- 
tions are among the most exquisite figures of fishes we have yet seen. 
The fishes obtained belong to ninety-five species, and are of 
great interest not only in their elucidation of the ordinary pelagic 
fauna of the North Atlantic, but also in the light they shed, upon 
the geographical and bathymetrical distribution of a certain number 
of remarkable forms obtained from depths of no less than 2000 
metres. Only six new species are determined, and only one new 
generic name is proposed, namely, Halosawropsis for Halosaurus mac- 
rochir of Giinther—an emendation also made some time ago by Goode 
and Bean, who, however, proposed to term the genus Aldrovandia. 
The classification of Giinther is mainly adopted in this memoir, 
and the new specimens of the more important species are carefully 
described in detail. The value of the work is also greatly enhanced 
by the copious references to the literature of the subject, and the 
comparison of the results with those of previous authors. It would 
tend much towards the progress of systematic zoology if this 
laborious method were more generally followed by the authors of 
such reports. When recording new facts, it adds much to the toil 
of the work to incorporate them and correlate them precisely with 
existing knowledge; but the additional labour is well spent, and it 
converts dry catalogues, comprehensible only to a few narrow 
* Poissons provenant des Campagnes du Yacht 7’ Hirondelle (1885-1888). By 
Robert Collett. 4to, pp. viii., 198, pl. vi. (Résultats des Campagnes Scientifiques 
accomplies sur son Yacht, par Albert 1° Prince Souverain de Monaco, fasc. x., 1896.) 
