58 



GENERAL ANATOMY. 



peculiarly clear and brilliant. The nerve-corpuscles vary in shape and size; 

 some are small, spherical, or ovoidal, with an uninterrupted outline. These 



Fig. 26. 



Fig. 27. 



Nerve-vesicles from the Casserian gan- 

 glion of the human subject, a. A globu- 

 lar one with defined border ; b, its nucleus ; 

 c, its nucleolus. d. Caudate vesicle ; e. 

 Elongated vesicle, with two groups of pig- 

 ment particles;/. Vesicle surrounded by 

 its sheath or capsule of nucleated parti- 

 cles ; g. The same, the sheath only being 

 in focus. (Magnified 300 diameters.) 



Nerve-vesicles from the inner parts of the gray matter 

 of the convolutions of the human brain (magnified 350 

 times). Nerve cells: a, larger; b, smaller, c. Nerve 

 fibre, with axis-cylinder. 



forms are most numerous in the ganglia of the sympathetic. Others, called 

 caudate or stellate nerve-corpuscles, are characterized by their larger size, and 



Fisr. 28. 



Fig. 29. 



Human nerve-tubes (magnified 350 times). 

 Three of them are fine, one of which is varicose, 

 one of middling thickness, and with a simple 

 contour ; and three thick, two of which are 

 double contoured, and one with grumous con- 

 tents. 



Nerve-tube of the common eel in water. The 

 delicate line on its exterior indicates the tubu- 

 lar membrane. The dark double-edged inner 

 one is the white substance of Schwann, slightly 

 wrinkled, b. The same in ether. Several oil 

 globules have coalesced in the interior, and 

 others have accumulated around the exterior of 

 the tube. The white substance has in part 

 disappeared. (Magnified 300 diameters.) 



from having one or more tail-like processes issuing from them, which occasion- 

 ally divide and subdivide into numerous branches. These processes are very 



