DE. J. MUEIE ON THE FOEM AND STEUCTUEE OF THE MANATEE. 189 



axillary space, was a moderate-sized semidivided glandular mass, lying between the 

 tips of the first and second ribs and the inner border of the latissimus. This exhibited 

 structure more resembling enlarged lymphatic glands than a mammary organ. Part of 

 the mass doubtless belonged to the lymphatic system ; but that portion of it which 

 appeared to constitute the mammary gland lay upon the scalenus muscle, between the 

 most anterior digitation of the external oblique and the middle of the first rib. The 

 outer border of the pectorales muscles partially overlapped it ; the latissimus, as said, 

 formed its outer boundary ; and the panniculus was superincumbent. The lymphatic 

 portion, which dipped into the axilla, was surrounded by a rete mirabile ; but that 

 portion which, from position, I took to be the mammary gland, had no such envelope. 



The position of the generative outlet is mentioned in the paragraph of measurements. 

 Excepting in proximity to the anus, there is really very little difference between the 

 sexes. An elevated labial rim surrounds the vulva, diminishing behind as it passes into 

 a linear perineal raphe. A few shallow sulci lie on either side of the latter. The 

 clitoris, hidden in the anterior fork, is large and rough, resembling much the prepuce 

 of the male. The vagina, during adolescence, is short, wide, and rugous, the os tincse 

 large and prominent. The body of the uterus, lengthened, narrow, and with many 

 longitudinal mucous folds, divides above into right and left cornua, the outer extremities 

 of which contain the ovary and fimbriated extremity lodged in the hypogastric fossa at 

 the hinder end of the diaphragm. 



Each renal organ in our female is 5 inches long, the two lying opposite one another. 

 Their figure is simple, with only a superficial indication of lobulation, but in reality 

 absence of division ; hilus shallow. The kidneys rest upon the tendinous surface of the 

 diaphragm, close to the spine, the posterior ends reaching the last ribs. The ureter 

 uniform in calibre in its course to the semiglobular bladder, hooks round the uterine 

 cornu and beneath the hypogastric artery (fig. 50), finally piercing the base behind 

 the neck. 



As regards the male sexual parts I have little to add to Vrolik's excellent figures and 

 description. On comparing figs. 47 and 48 a considerable resemblance between the 

 glans penis and clitoris is apparent, the meatus urinarius of the male being slightly 

 elongate. The correspondence, again, in general appearance, position, &c. of the testes 

 and spermatic duct with the ovaries and cornua is not a little remarkable ; and this is 

 even more heightened by the presence of a hypogastric fossa {hf, fig. 49) and rete 

 mirabile in the neighbourhood. 



XL Rank and Relations op Manatus. 

 It was a most natural conclusion of the earlier naturalists to look upon the Lamatins 

 as modified Whales (Cu^^'ier's Herbivorous Cetacea), still bolder of De Blainville to 

 class them as aberrant Elephants (Gravigrades), but more just and safer of Illiger to 

 group them apart as an order Sirenia. Every animal doubtless has its appointed place 

 and time in the great scheme of creation. Could we but for a moment remove that 



