ZIPHIUS OBTAINED NEAB DUNEDIN. 247 



developed urachus and two hypogastric arteries, which retain a small lumen. The 

 ureters join the bladder about 6 cm. from the neck, and pass backwards and inwards 

 for fully 4 cm. through its walls before opening into its cavity 2 cm. from the cervix. 

 The urethra was cut off in such a way as not to injure the vulva, as it was intended to 

 stuff the skin ; the portion left attached to the bladder is no less than 23 cm. (9 in.) 

 long. 



Each horn of the uterus (PL L. fig. 10) is 21 cm. (9-25 in.) long and 2-25 cm. (0-8 in.) 

 in diameter, the whole organ being moderately distended with alcohol. The corpus 

 uteri is about 11 cm. (4-3 in.) long, and is not clearly marked off from the vagina, 

 owing to the fact that there are three well-developed and two less perfect ora uteri or 

 constrictions of mucous membrane between the two cavities. A similar arrangement 

 is described by Murie in Globiocephalus. Each cornu uteri is marked internally by 

 4-6 longitudinal ridges of mucous membrane; there are 7 or 8 such ridges in the 

 corpus uteri ; in the vagina they become very numerous. 



The Fallopian tube is about 6 cm. (2 - 4 in.) long, and opens by the usual dilated and 

 fimbriated extremity into the bottom of a deep pouch of peritoneum, the extremities of 

 which are gathered together and attached, on the one hand to the Fallopian tube 

 immediately mesiad of the ovary, and on the other to the round ligament. As the 

 organs were removed from the body before being carefully examined, we cannot say 

 what were the precise relations of this pouch to the ovary. Murie states that in 

 Globiocephalus " the broad ligament and the fimbria? of the Fallopian tube form a 

 delicate arched covering or pavilion which overarches the ovary." 



The ovary is 6 - 5 cm. (2-6 in.) long by l - 4 cm. wide; its bolus, or line of attachment 

 to the broad ligament, is fully 4-5 cm. in length. It is quite immature, presenting no 

 prominent Graafian follicles or corpora lutea. 



EXPLANATION OF THE PLATES. 



PLATE XLVIII. 



Fig. 1. Ziphius, sp. The entire animal, from the right side (^t natural size) : na, posi- 

 tion of blow-hole ; g.a.f. position of genito-anal fissure. 

 Fig. 2. The tail-fin, from above (^- g nat. size). 



PLATE XLIX. 



Fig. 3. View of the genito-anal and mammary clefts, the former having its lips widely 

 separated to show cl, the clitoris, v, the vulva, and a, the anus>; m.cl, the 

 left mammary cleft (^ nat. size). 



