Ix ANATOMICAL SOCIETY OF GREAT BRITAIN AND IRELAND. 



Having removed the peritoneum and displayed the underlying 

 viscera, namely, the bladder, ureters, seminal vesicles, vasa deferentia, 

 etc., the vireters were cut, and by the aid of a long curved scissors, 

 the bladder, which was empty and contracted, was separated from the 

 prostate and removed. In a similar manner, the vas deferens having 

 been cut on each side, the prostate, with the seminal vesicles and the 

 ends of the vasa deferentia attached, was carefully separated from 

 the rectum, the pelvic floor, and the membranous urethra, and 

 removed. The rectum, which was distended with fpeces, was cut 

 just above the beginning of the anal canal and taken out ; and the 

 visceral layer of pelvic fascia having been removed from the white 

 line inwards, the levator ani and coccygeus were exposed. The 

 contents of the rectum were carefully removed, with the intention of 

 filling that organ with gelatine, but so thoroughly were its walls 

 hardened that it retained its form perfectly, and in its interior an 

 excellent view of Houston's valves was obtained. The various organs 

 were then replaced in their proper positions within the cavity, and 

 the whole pelvis built up again out of its constituent parts. The 

 specimen aftbrds a very satisfactory means of demonstrating the 

 anatomy of the pelvic cavity, as each organ can be removed or 

 restored to its place at will, without losing its shape in the slightest 

 degree. 



(b) A case slioioing the Pelvic Peritoneum. — The pelvis was sepa- 

 rated from the body, as in the preceding specimen, the pelvic colon 

 (sigmoid flexure) was removed, and a piece-mould of the cavity made, 

 from which a cast was afterwards obtained. The bladder and rectum 

 were empty and contracted, and all the folds of peritoneum well 

 marked. The cast shows the bladder, the whole pelvic course of the 

 vas deferens running beneath the peritoneum, the ureter, obliterated 

 hypogastric artery, and the rectum. It also shows very clearly the 

 plica vesicahs transversa, the paravesical, obturator, and hypogastric 

 fossae described by Waldeyer, and at each side of the rectum the 

 "pararectal fossa" described by the exhibitor. 



(c) Naso-p1iary7ix. — A coronal section was made through the head, 

 ■vvhich passed through the nasal septum within a few mm. of, and 

 parallel to, its posterior border. The posterior nares were particularly 

 wide ; and the whole naso-pharynx, with the openings of the Eusta- 

 chian tubes, could be clearly seen through them. 



(d) Ainral Gland of Nulin. — The anterior part of the tongue was 

 turned up, retained in this position by a pin, and then hardened 

 by immersion in strong formalin solution. The gland, which is 

 over half an inch in length (almost f inch), was exposed on one 

 side by the removal of a layer of muscle about 1 mm. in thickness, 

 derived from the united styloglossus and inferior lingualis. On the 

 opposite side, the four or five ducts of the glands, which open 

 directly on the slight prominence produced by the gland, were 

 demonstrated. 



(e) Pyloi-us, Plica triangularis:. — Several specimens of the pylorus, 

 from formalin-hardened bodies, all of which were closed, and a pharynx 



