Discovery reports (1940) Discovery reports discoveryreports19inst Year: 1940 THE SOUTHERN SEA LION 137 The uterus is bicornuate and the lumina of the horns are discrete for almost their entire length uniting at a point only 2 or 3 cm. from the os uteri. In no. 477 they do not unite at all but enter the vagina by separate apertures. The external walls of the cornua unite in the middle line about the middle of their length. The following description and measurements are taken from the reproductive system of no. 475, which was a large animal (see Plate XXX). The abdominal aperture of the Fallop
Discovery reports (1940) Discovery reports discoveryreports19inst Year: 1940 THE SOUTHERN SEA LION 137 The uterus is bicornuate and the lumina of the horns are discrete for almost their entire length uniting at a point only 2 or 3 cm. from the os uteri. In no. 477 they do not unite at all but enter the vagina by separate apertures. The external walls of the cornua unite in the middle line about the middle of their length. The following description and measurements are taken from the reproductive system of no. 475, which was a large animal (see Plate XXX). The abdominal aperture of the Fallopian tube is situated laterally and dorsally with reference to the ovary; it is of small size and surrounded 44S 432 475 by the delicate and irregular fimbria which, although \ somewhat extensively adherent to the interior of the ovarian capsule, may, in places, have a free height of 1 -5 cm.; but as has been said it is very irregular in form. The abdominal aperture readily admits a blunt seeker but the uterine end of the tube is too small to allow this. The tube follows a tortuous course in the wall of the capsule ventral to the ovary, turning eventually in a dorsal direction and bending slightly towards the middle line before opening into the uterus by a funnel-shaped Fig 3 Diagram of right ovaries of mouth. The length of the Fallopian tube is about 21 cm., 446, 432, 475, showing relative in- r . . .,, crease from non-parous to multi- but owing to its sinuous form it is not possible to parous condition. measure it with precision. The right cornu of no. 475 is 27-5 cm. in length and the mucosa is deeply folded longitudinally; but in a non-parous animal the folds were less deep. At a distance of about a centimetre from the aperture of the Fallopian tube the wall of the cornu, excluding the mucous membrane, is 0-25 cm. thick, and at a similar distance from the junction of the cornua the thickness is about 1 cm. The common part of the uterus is only 3-1 cm. in length, little more
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