30 DESCRIPTIONS OF PREPARATIONS. 



For that of the Peyerian patch on the colon, where the follicles are larger than 

 anywhere else, see Frey, ibid. p. 68. 



For the method of injection by puncture and the use of Berlin blue, see Frey, 

 Z. W. Z. /. c. p. 52, and Mikroskopische Technik, ed. 7, 1881, pp. 128, 132, 293, 

 295; and Schafer, Practical Histology, pp. 144 and 157. 



For the presence of villi in the large intestine, see Cuvier, Legons, ed. 2, 1835, 

 iv. pt. 2, pp. 243 and 274. 



8. BLADDER, UTERUS MASCULINUS, UROGENITAL CANAL, AND 

 RECTUM, WITH GLANDS IN RELATION WITH THEM RESPECTIVELY, 

 OF MALE RABBIT (Lepus cuniculus). 



With Figure 4. 



THE upper half of the bladder has been removed, and the cavity of the 

 lower half, a, laid open from behind, as have been also the cavities of the 

 Uterus masculinus, s. ' Organ of Weber,' s. Vesicula prostatica, b, and of 

 the urogenital canal at d. The right cms penis has been cut through at /, 

 as also the left, not seen in the figure of this Preparation ; and the parts 

 removed from their connection with the pelvis. A wire has been passed 

 from the cavity of the bladder along the urethra behind the uterus masculi- 

 nus, d, into the urogenital canal, d, and along this canal to its outlet in the 

 glans penis. The rectum, c, has been displaced to the right from the mesial 

 plane which it naturally occupies. The walls of the bladder have been 

 turned outwards, and the orifices of the ureters appear consequently to lie 

 upon its anterior instead of upon its under or posterior surface as in nature. 



The utems masculinus, b, is of colossal proportions in the Leporidae, 

 attaining in some cases an absolute length of as much as three inches. 

 With the exception of the Koala, it has not been observed in any marsupial, 

 the generative organs of which animals, however, resemble those of the 

 Rabbit in some points, as, for example, in the absence of seminal vesicles. 

 It bears here a striking resemblance to the upper part of the vagina of the 

 female Rabbit, as shown at b in Fig. 5, p. 37, having a similar rudimentary 

 septum developed upon its anterior wall. But the presence, not merely of 

 a considerable interlacement of muscular fibres, but also of glandular 

 structures in its walls, as also some other reasons, would seem to make it 

 safer to consider this organ to represent at once both uterus and vagina. Its 

 upper angles are slightly produced and project between the upper boun- 

 daries of the prostatic glands, h, and the cut short ends of the vasa de- 

 ferentia. These projections, like the somewhat similarly drawn-out upper 

 angles of the true human uterus, must be taken to represent the cornua 

 uteri of the uterus duplex and uterus bicornis. The organ is flanked on 



