s among American Indians," _American
Journal of Obstetrics_, No. 6, 1892.

[87] In the male, the phenomenon is termed rut, and is most familiar in
the stag. I quote from Marshall and Jolly some remarks on the infrequency
of rut: "'The male wild Cat,' Mr. Cocks informs us, (like the stag), 'has
a rutting season, calls loudly, almost day and night, making far more
noise than the female.' This information is of interest, inasmuch as the
males of most carnivores, although they undoubtedly show signs of
increased sexual activity at some times more than at others, are not known
to have anything of the nature of a regularly recurrent rutting season.
Nothing of the kind is known in the Dog, nor, so far as we are aware, in
the males of the domestic Cat, or the Ferret, all of which seem to be
capable of copulation at any time of the year. On the other hand, the
males of Seals appear to have a rutting season at the same time as the
sexual season of the female." (Marshall and Jolly, "Contributions to the
Physiology of Mammalian Reproduction," _Philosophical Transactions_, 1905,
B. 198.)

[88] A. Wiltshire, _British Medical Journal_, March, 1883. The best
account of heat known to me is contained in Ellenberger's _Vergleichende
Physiologie der Haussauegethiere_, 1892, Band 4, Theil 2, pp. 276-284.

[89] Schurig (_Parthenologia_, 1729, p. 125), gives numerous references
and quotations.

[90] Quoted by Icard, _La Femme_, etc., p. 63.

[91] Bland Sutton, _Surgical Diseases of the Ovaries_, and _British
Gynecological Journal_, vol. ii.

[92] W. Heape, "The Menstruation of _Semnopithecus Entellus_,"
_Philosophical Transactions_, 1894; "Menstruation and Ovulation of
_Macacus Rhesus_," _Philosophical Transactions_, 1897.

[93] W.L. Distant, "Notes on the Chacma Baboon," _Zooelogist_, January,
1897, p, 29.

[94] _Nature_, March 23, 1899.

[95] W. Heape, "The Menstruation of _Semnopithecus Entellus_,"
_Philosophical Transactions_, 1894, p. 483; Bland Sutton, _Surgical
Diseases of the Ovaries_, 1896.

[96] T. Bryce and J. Teacher (_Contributions to the Study of the Early
Development of the Human Ovum_, 1908), putting the matter somewhat
differently, regard menstruation as a cyclical process, providing for the
maintenance of the endometrium in a suitable condition of immaturity for
the production of the decidua of pregnancy, which they believe may take
place at any time of the month, though most favorably shortly before or
after a