SEXUAL ACTIVITIES OF THE SQUID 411 
trolling the movements of the parts of the spermatophorie organ, 
and accordingly the forming spermatophores, must be badly 
interfered with. 
In a spermatophore removed from this position the outer 
tunic over the aboral end is well formed and normal in appear- 
ance. That over the oral end is thin, somewhat opaque, and 
adheres to a needle. It is most difficult to get specimens at 
this stage of formation free without injury. Figure 24 shows 
the oral end of the only really perfect specimen I have been able 
to remove. 
In passing into the finishing gland the oral end of the sper- 
matophore is pressed forward into the pointed end of the gland 
and evidently receives further additions to the outer tunic. The 
aboral end of the spermatophore is now free from the hardening 
gland and the secretions from this gland are free to find their 
way into the finishing gland. Whether this actually takes place 
I do not know, but the oral end, which just before was covered 
by a thin, somewhat opaque and sticky outer tunic, changes 
in form and appearance to that of the completed spermatophore. 
The last processes in the change have to do with the formation 
of the cap. As shrinkage takes place, the oral end of the ejac- 
ulatory apparatus becomes further coiled and the cap region 
is bulged outward by the end of the tube formed by the inner 
and middle membrane (fig. 25). The cap thickens and the tube 
in question is forced over and finally pressed out sidewise so 
the lumen of the tube is spread to correspond to the shape of 
the cap (figs. 26 and 27). The margins of the tube that come 
in contact with the margins of the swollen cap are fastened 
to the ridge of the outer tunic along the borders of the cap, and 
further shrinkage brings the spermatophore into functional 
form. 
It is while in the finishing gland that the spermatophore 
shrinks into the finished size and the outer tunic becomes nor- 
mally turgid and elastic. Here the hyaline core disappears 
probably becoming liquid. When the spermatophore starts 
down the spermatophoric duct it is completed in form and ca- 
pable of normal ejaculation. A slight shrinkage, especially in 
