122 CELL THEORIES. 
pared with the nuclei in textures than with proto- 
plasm around nuclei. If certain of them are non- 
nucleated protoplasmic masses, may not vibriones 
be regarded as mere nuclei and nothing else? 
Besides, in the textures, there are many nuclei 
which have no apparent protoplasm about them ; 
and there are also nuclei with processes, which may 
be regarded as bodies intermediate in character 
between the typical nucleus and the protoplasmic 
mass. The corpuscles of the deep layers of the 
cutis are mere nuclei, with long processes in various 
directions; while in the tapetum of the eye of the 
ox long threads extend from nuclei, like the threads 
at the extremities of fusiform cells in foetal connec- 
tive tissue. Also, a spermatozoon may be regarded 
asa simple nucleus. No doubt, as mentioned by 
Stricker, both Schweiger Seidel, and la Valette St. 
George declare that not only a nucleus, but proto- 
plasm, enters into the construction of the sperma- 
tozoon; but if we examine the forms represented 
by la Valette, both in “Stricker’s Manual” and 
in his original paper in “Schultze’s Archiv,” we 
shall see that what is meant is that the proto- 
plasm is at first adherent to the spermatozoon or 
nucleus, and afterwards absorbed into it or other- 
wise lost, but that there is no permanence in 
the spermatozoon of a substance preserving the 
