ANATOMICAL SOCIETY OF GREAT BRITAIN AND IRELAND. XIX 



On laying apen this heart-like organ, its interior was seen to consist 

 of a spongy arrangement of what seemed like muscular trabeculae, 

 the interstices of which were filled with blood-clot. Xear its attached 

 extremity the walls were thin and membranous, being directly con- 

 tinuous with the poucli-like extension of the tendon of the diaphragm., 

 but towards its apex the muscular wall attained a thickness of 6 

 or 7 mm. The wall of this organ, which was turned towards the 

 diaphragm, was considerably thicker than that which was directed 

 upwards. A careful examination of the interior failed to reveal any 

 division into cavities, nor were any valve-like arrangements noticed, 

 the cavity being ill defined, owing to the spongy nature of its walls. 

 No other aperture than that already described was found either leading 

 into or out of the cavity of this organ, so that the opening already 

 referred to, which led into the sinus-like pouch, must have servesd as 

 a channel of exit entrance for the blood which circulated within this 

 organ. 



As will be apparent from a perusal of the' foregoing description, it 

 wa&' well-nigh impossible to account for the condition on develop- 

 mental grounds, and yet all to whom the specimen was shown agreed 

 in supposing that the accessory structure was of the nature of a heart. 

 Fortunately we had taken the precaution of having a microscopical 

 .examination made of the wall of th^s supposed heart, and fresh light 

 was shed on the condition when my friend Dr ]\Iann reported that the 

 tissue examined was not muscular in its nature, but was composed of 

 typical liver substance. The condition is thus readily accounted for 

 by assuming that at an early period of development a hernia of the 

 liver passed through the diaphragm, and ultimately invading the peri- 

 cardial sac, assumed the form and connections already described. 



Farther, the present specimen affords a possible explanation of the 

 oft-quoted cases of Boerhave and Meckel, which have hitherto been 

 hard to account for. 



(.3) Dr Raymond Johnson showed an Ann'maJij of the Ureter of a 

 child which had died soon after birth. The ureter was double, 

 except at its lower extremity, where it was single. The ureter did 

 not end in the bladder, but near the external urinary meatus. 



In the discussion which ensued, it was agreed that it was a case in 

 which the ureter of one side had partially retained its embryonic 

 origin from the Wolffian duct, and thus come open near the meatus. 

 The case is to be fully reported and illustrated in the current volume 

 of the Transactions of the Pathological Societij of London. 



(4) Professor F. Dixon showed a series of models illustrating the 

 Anatomy of the Pelvic Viscera. The models were specially intended 

 to show the form, relations, and peritoneal folds of the bladder in 

 full and empty conditions. 



(5) Dr T. Savage exhibited a boy in which a forearm and hand 

 were represented merely by rudiments of the digits. A skiagram was 

 exhibited along with the case, showing that the proximal ends of 

 the forearm bones were also present. 



