404 GILMAN A. DREW 
place and method of formation of the cement body, but thus far 
I have not been successful. 
As the sperm mass and cement body leave the mucilaginous 
gland and are passed along the spermatophoric organ, a thin 
thread of mucilaginous material is formed which is continuous 
with the cement body. This continues to be formed as the forming 
spermatophore passes on, and becomes the hyaline core (fig. 23 
HC) around which the spiral filament is wound. Racovitza, 
(94) calls this the hyaline core in his description of the sper- 
matophore of Rossia, where it evidently persists in the fully 
formed spermatophore. In the squid it is present only during 
the formation of the spermatophore and disappears before the 
spermatophore becomes functional. 
The part into which the sperm mass and cement body is passed 
from the mucilaginous gland is thick-walled and granular, but 
the inside is smooth, not thrown into ridges and grooves as in 
the mucilaginous gland, nor are there sacules or tubules in its 
structure. The inner surfaces are smooth and strongly ciliated. 
The upper surface of the wall (the surface toward the visceral 
mass) is thrown into a very prominent ridge (figs. 32 and 34, 
GR) very similar in appearance to the typhlosole in the intestine 
of an earthworm, except that it is not bilaterally symmetrical. 
One margin of the ridge is drawn to the side and overhangs to 
form a very definite: ciliated groove (fig. 34, @), along which the 
forming spermatophore is passed, moved by the cilia and by 
movements of the organ, and kept constantly rotating on its 
longitudinal axis. 
The general structure of this portion of the spermatophoric 
organ is essentially the same from the mucilaginous gland to 
the narrow duct near the anterior end of the organ, but at least 
two divisions may be recognized in it. Externally the bound- 
aries of these divisions are roughly marked by constrictions, 
the first of which (figs. 29 and 32, C1) may be taken as the bound- 
ary of the mucilaginous gland and the second (C?) the boundary 
between two functional parts which show very similar structure. 
Marchand refers to these two divisions jointly as the third part 
of the spermatophoric gland. As the two parts are functionally 
