TUMOURS OF THE HEART. 379 



verse direction, i. e., at right angles to the pedicle, 4f inches; 

 from the centre of the pedicle to the highest point on the 

 surface, 2J inches; pedicle, from base to the uppermost 

 ramification, 1| inches. In front of the pedicle is a small 

 flattened tumour, about 1 inch in length, and \ inch in 

 width, possessing the same physical aspect as the other, 

 without gritty deposit, and firmly attached by a very slender 

 and long peduncle. 



" Microscopic Examination. On examining the connec- 

 tions of the pedicle and the layers of fibrine surrounding it, 

 there is evidently a gradual transition of structure from the 

 tough fibrous and vascular peduncle to the cheesy granular 

 and exsanguine fibrinous deposit. On examination with the 

 microscope, the peduncle is seen composed of fibrous tissue, 

 and interspersed are elongating lymph-corpuscles (a, Fig. 

 116.) Towards the processes of this fibrous deposit, the 

 tissue is more imperfectly organized; fibroplastic cells (c) are 

 more numerous, and as we extend from the centre these in 

 their turn give way to the unchanged lymph corpuscles (6) 

 and molecular matter constituting each compact layer. In 

 some parts towards the surface of the tumour, the molecular 

 matter almost entirely constitutes the layers; in others the 

 lymph cells are very abundant. The gritty deposit on the 

 surface effervesced on the addition of hydrochloric acid, and 

 some phosphatic crystals (though few in number) were seen. 



" CASE II Cardiac Polypus firmly adherent to the 

 Internal Wall of the Right Auricle. (This is the de- 

 scription of specimen 2510 in the musuem of the University 

 of Bologna.) 



" Professor Allessandrini says of this tumour, that it oc- 

 curred in an ox, nine years old, that died suddenly, and 

 which previously had shown no signs of ill-health. A ver- 

 tical section $f the heart being made from the base to the 



