SEXUAL ACTIVITIES OF THE SQUID a0 
become free in the water, as when they are attached in the mantle 
chamber, or may be stored in a special receptacle, as when they 
are attached in the special depression on the outer buccal mem- 
brane. They are mixed with a viscid secretion in the reservoir 
and probably also before entering the reservoir, although I am not 
certain about the latter. The epithelium of the region is abund- 
antly supplied with goblet cells which very possibly supp’y se- 
cretion for this purpose. 
The depression in which the sperm reservoirs are mostly at- 
tached is supplied with a deeply staining columnar epithelium 
which is covered by a mass of rather hard material, evidently se- 
creted by these cells, that shows distinct markings parallel with 
the surface of the epithelium (figs. 11 and 12). These markings 
seem to indicate that the material is secreted intermittently and 
thus is formed in layers. This material forms a suitable place for 
attachment of sperm reservoirs and probably serves no other pur- 
pose. Reservoirs are sometimes attached to other portions of the 
buccal membranes or to the tentacles but they are far more abun- 
dant in the depression than anywhere else. The sperm that es- 
cape from the reservoirs that are not attached in this depression 
probably do not find their way into the sperm receptacle. 
The sperm receptacle has the shape of a compound alveolar 
gland (fig. 11). It is imbedded in the outer buccal membrane and 
opens on the inner surface of this membrane at a point opposite 
the junction of the two ventral arms. Simple cubical epi- 
thelium lines the deeper alveoli of the receptacle, and cubical 
epithelium with many goblet cells the portion nearer the open- 
ing. Some, but not many, cilia have been seen on these cells. 
The killing fluids used may not have preserved them, for the tails 
of sperm in the reservoirs are not often individually visible in the 
sections. With the exception of the tails of the sperm and the 
possible cilia on the cells the material gives evidence of good pre- 
servation. A layer of muscle fibers surrounds the receptacle as 
a whole and bundles of fibers run between and around the indi- 
vidual alveoli. 
It was not determined whether the sperm are active in the in- 
terval between their discharge from the reservoirs and their en- 
JOURNAL OF MORPHOLOGY, VOL. 22, NO. 2 
