varies much; but we shall return to this point. The degree to which the
various breeds differ in the perfection of their senses, dispositions, and
inherited habits is notorious to every one. The breeds present some
constitutional differences: the pulse, says Youatt (1/67. 'The Dog' 1845
page 186. With respect to diseases Youatt asserts (page 167) that the
Italian greyhound is "strongly subject" to polypi in the matrix or vagina.
The spaniel and pug (page 182) are most liable to bronchocele. The
liability to distemper (page 232) is extremely different in different
breeds. On the distemper, see also Col. Hutchinson on 'Dog Breaking' 1850
page 279.) "varies materially according to the breed, as well as to the
size of the animal." Different breeds of dogs are subject in different
degrees to various diseases. They certainly become adapted to different
climates under which they have long existed. It is notorious that most of
our best European breeds deteriorate in India. (1/68. See 'Youatt on the
Dog' page 15; 'The Veterinary' London volume 11 page 235.) The Rev R.
Everest (1/69. 'Journal of As. Soc. of Bengal' volume 3 page 19.) believes
that no one has succeeded in keeping the Newfoundland dog long alive in
India; so it is, according to Lichtenstein (1/70. 'Travels' volume 2 page
15.), even at the Cape of Good Hope. The Thibet mastiff degenerates on the
plains of India, and can live only on the mountains. (1/71. Hodgson in
'Journal of As. Soc. of Bengal' volume 1 page 342.) Lloyd (1/72. 'Field
Sports of the North of Europe' volume 2 page 165.) asserts that our
bloodhounds and bulldogs have been tried, and cannot withstand the cold of
the northern European forests.]

Seeing in how many characters the races of the dog differ from each other,
and remembering Cuvier's admission that their skulls differ more than do
those of the species of any natural genus, and bearing in mind how closely
the bones of wolves, jackals, foxes, and other Canidae agree, it is
remarkable that we meet with the statement, repeated over and over again,