166 -\'H\V YORK ZOOLOGICAL SOCIETY. 



tion of the Marchii inelhod show no degenerated fibers cither in 

 the coknnns of the cord or in the surnmncHng- nerve trunks. 



Dorsal Cord. — The same changes noted in the cervical cord 

 are also present in the dorsal segments. A few of the ganglion 

 cells show, however, an abnormal brownish ])igmentation. No 

 degenerated fibers are demonstrable by the Ihisch method. 



Lumbar and Sacral Cords. — Chang^es similar to those described 

 above are present. The entire spinal cord as rejiresented by 

 these sections may be said to be practicall\- normal. 



S/'U'rii. — The blood vessels are markedly congested through- 

 out and there is a general extravasation of red blood cells through 

 the s])lenic pulp. The Mal])ighian bodies show many evidences 

 of acute lvm])hoid hy])eri)lasia. Extensive areas of pigmentation 

 are present in ])laces. apparently resultitig from the breaking 

 down of many red blood cells. 



Done. — Shaft of femur. — The fatty tissue of the marrow is 

 largely replaced bv dense masses of mononuclear and polynuclear 

 leucocytes, fibroblastic and plasma cells, rimong which are found 

 frequent multinuclear and mononuclear giant cells. Evidences 

 of kar\-okinetic division are fre(}uent among these cells, but in 

 places fibroblastic cells i)redominate and a mucoid-like tissue is 

 found rejilacing the marrow. Osteoclasts are found abimdantly 

 at the juncture with the compact tissue and these cells have largel\- 

 replaced the endostiuiu and. in places, are evidently causing active 

 resorption of the osseous tissue. S(Mne of the larger Haversian 

 canals in the comi)act l)one are surrounded l)y osteoid tissue from 

 which the lime salts ha\e evidentl\- hcvu removed leaving the 

 general structure very similar to that of normal l)one with the 

 exception that the bone cells have become considerably altered, 

 being larger, more numerous, and ])resenting evidences of reiiro- 

 duction. Osteoclasts arc al)sent. excei)t in the larger of these 

 spaces, and the process does not seeui to ])c pri:u-n"il\- la'.nmar 

 absorption. 



C.\si-: XI. 



.Sapajou iCchns hyf^olcuciis ) . — 'i'his animal had ])cr\] in cap- 

 tivitv several \ears before- being deposited at the I 'ark. Paral- 

 ysis was not a feature of this case and reflcyt's were i)resent in 

 the hind liml)S. On palpation a cousidcraltle alterrition in iItc 

 sliape of thorax and esi)eciall\ of tlu- sternum was found. I he 

 animal was killed in the earlv stage of the dise.asi'. wln\-li probable 

 accounts foi" the absi-nce of anesthesias of the posterior extremi- 

 ties. 



