Central nervous system of Tunica nigra. 119 
seem to have but one process may have other smaller ones which 
were not detected. A few cells, especially in the central portion 
of the ganglion, were found to have several processes of about equal 
Fig. E. Fig. F. 
Fig. D. Drawing of a cross section of the ganglion and gland of Tunica nigra 
passing through the origin of a large and a small nerve. oral 
Fig. E. Drawing of a cross section through the centre of the ganglion and 
gland, the gland on the ventral side. Gist. 
Fig. F. Camera-lucida sketch from a cross section of a ganglion. The part 
reproduced extends from the connective-tissue sheath to the center of the ganglion. 
450 : 1. 
size. Something could be learned about the shape of the neurons 
and the general direction of their larger branches from methylen- 
blue preparations obtained in section, but the most perfect cells 
were obtained from specimens fixed in Fremmise’s fluid and stained 
