ÜX SÜPRAKENA BODIES IX THE MOUSE. 



219 



Woodcut 1. 



From a mouse one day old. The left .suprarenal body is represented. Ao=Aorta, 

 B v. = Veins, Cor.=cortex, Med. = Medulla, Mes.=Mesentery, s. s. = Maiu mass of 

 Sympathetic ijanglia, sy. <j:.— gang-lion of sympathetic origin. 2xBB. 



So far US trart'd, the niediilla i.s always di.stiiK-t fVum the cortex, 

 and its origin cannot be decided. lUit some interesting (and evident- 

 ly a little ahnornial) cases were met with. In one mouse jast born 

 (woodcut 1), the roughly eliiptictil medulhi (med.) .situated in the 

 centre of the organ sends otf an (jifslxjot at one place toward the 

 medial side, actually reaching the C(jmiective tissue capsule. Outride 

 the organ hes a large ganglion (sy. g.), which is found on tracing- 

 sections to Ije continuous with the main sympallietic system (s. s.). 

 The medullary cells of the suprarenal body and the true ganglion 

 cells are very similar in their size and colouration. This condition 

 was observed only on the left suprarenal. 



In a three-day (jid mouse (woodcut 2), again on the left side, I 

 obser\'ed an actual ctjnnection of the medidhi with the gangli(jn. In 

 tig. 17 (PI. XXXI.), which is a more magnified tigure of the wootl- 

 cut 2 I), a mass (jf cells with small and deeply stained nuclei (med.) 

 eads out of the organ, and directly joins the ganglion cell mass (sy. g.) 



