787 



wliicli bears traces of folds, and in wliicli the epitlieliiiin appears 

 again lo be qnite intact. The whole ventriculns has a length of 

 3 mm., and there is no sign of any rupture. At the end of the 

 conns we find outside the continuation of the dura numerous spinal 

 ganglions, the largest with a diameter of 0.750 mm., wliile a few 

 smaller ones can be seen caudallj from the conus (fig. 12). 



Capra hircus. On tlie border of the last lumbal an.d the first 

 sacral segment the medulla is roundish on section, the anterior horns 

 are well developed and almost reach the periphery-; they are very 

 rich in large cells, which also occur in the so-called middle-horn ; the 

 posterior horns, with their round, cap-like, broadened tops parlly, 

 and rather more caudally entirely, reach the periphery. They contain 

 few large cells ; tiie fibre-system round tlie substantia gelatinosa Rolandi 

 is also distinctly present. The section shows the canalis as an upright 

 oval, at this place it is 0.270 mm. deep and 0.1 mm. wide. The 

 septum posterius is very thin and the fissura anterior very narrow. The 

 canal is quite free, ventro-laterally we find on the right and left a 

 sharply defined fibre bundle, more or less round, with a diameter of 

 0.2 mm. These bundles are also present in the lumbal medulla and can 

 be traced far back'). Also in the second series they can equally 

 clearly be seen. Owing to the canal deepening caudally they gradually 

 come to lie right and left beside the canal [fig. 13). In this level the 

 conus is still round in section and numerous cells, though in general 

 of a smaller type than before, are met with in the anterior horns, as 

 also in the middle-horn and dorsally from the central canal. The 

 posterior horns are still poor in cells. More caudally the septum 

 posterius disappears and the whole posterior portion of the conus 

 is taken up by the sensory area, in which the two horns have 

 merged into one, the fissura anterior has grown very sliallow, the 

 central canal has shifted further ventrally and has become wider. 



Fig. 13. Capra hircus. 



Fig. 14. Gapra hircus. 



1) According to Dexler these sharply circumsciibed 'intra Icommissurale Yen- 

 U'albündel" occur constantly in the Ruminants and in Pigs. (Ellenberger, Hand- 

 buch der vergleichenden miiiroskopischen Anatomie der Haustiere, Vol. II, Page 214). 



In the call's foetus Ihey were not present. 



