464 SCHULTE, SEI WHALE. 



approximately at the transverse level of the body of the uterus. Adjacent to the uterus and 

 cornu as far laterad as the line just mentioned the substance of the ligamentum latum is thick- 

 ened and almost opaque, beyond the line thin and delicate. Beauregard and Boulart : describe 

 a mass composed of fat and a vascular plexus in the broad ligament, to which this thickening 

 as to the structure of which I am uncertain, may be antecedent. It appeared like the thick 

 areolar tissue elsewhere beneath the peritoneum, in which a beginning deposit of fat was taking 

 place. The injection of the aorta and postcava failed to extend into the smaller vessels and I 

 was unable to follow any into this region of the broad ligament. The attachment of the body 

 of the uterus is flush with its ventral surface. As a result of this, taken together with the thick- 

 ening of the ligament, the outlines of the body and also of the proximal portions of the cornua 

 are obscured in ventral view. Towards the middle of the cornua small furrows appear along 

 their concave margins, which mark them off from the ligament. Dorsad both uterus and cornua 

 project strongly and the cornua are further demarcated by sulci. It is as though these structures 

 in being moulded ventrally upon the smooth bladder had lost their individual relief, while 

 retaining it dorsally where less intimately in contact with other viscera. At the sides of the 

 bladder the ligament follows its contour entering the cleft between it and the lateral abdominal 

 wall, thence returning dorsad to its attachment with the resulting formation of the fold before 

 mentioned. This lateral portion is triangular in shape broadening rostrad, and to its summit 

 is attached the oviduct. 



Two accessory folds, in addition to the mesovarium, are present in the domain of the broad 

 ligament, one on its ventral the other on its dorsal surface. The former has a free edge extend- 

 ing from the distal portion of the cornu, 2.5 mm. from its junction with the oviduct, to the arch 

 of the hypogastric artery, where it is lost in the parietal peritoneum. Within it is a delicate 

 band which disappears at about the same point, thus representing the round ligament. The 

 second dorsal fold is larger. It extends from near the lower pole of the ovary caudad and laterad, 

 finally sweeping mesad in the dorsal paries but fading out before it reaches the aorta. It appears 

 to carry the ovarian vessels. 



Vagina. The vagina begins as a fusiform dilatation which has a length of 12 mm. and 

 is then continued as a long narrow passage to the vulva, a distance of 19 mm. This distal seg- 

 ment is in contact with the rectum, to which it presents a concave dorsal surface as far as the 

 perineum where it turns ventrad to the vestibule. The dilatation is marked by seven very 

 shallow transverse furrows, which correspond to transverse folds in its interior. They are 

 deeper and farther apart at its middle, fainter and nearer together at its ends. Ventrally only 

 the rostral extremity of the dilation is covered by peritoneum, which is here reflected upon the 

 bladder. Dorsally the whole length of the vagina as far as the perineum is peritoneal, a narrow 

 pouch extending between it and the rectum. Ventrally this portion is in relation to the urethra, 

 which is adherent but not included in its wall and the two are surrounded by a thick fascia. 



The interior of the vagina, after the removal of its dorsal wall, shows in its distal segment 

 a mucosa smooth save for the presence of delicate longitudinal folds, which become obscure 

 as they approach the dilated portion. Here in addition to the seven transverse folds, corre- 

 sponding to the grooves of the exterior are indications of the formation of two and possibly three 

 more folds at the junction with the distal portion. These last are represented by rows of tuber- 

 cular elevations separated by shallow sulci, which are more advanced upon the ventral wall, 



1 Beauregard and Boulart, op. cit. 



