414 GILMAN A. DREW 
and inner tunics forces the reservoir containing the sperm mass 
out, ruptures the cement body and smears the cement over the 
closed end of the sperm reservoir. 
In this condition this body is freed from the remainder of the 
spermatophore and is normally stuck in position on the female 
by the cement. 
Reference to the diagrams on plate 6 will aid in understand- 
ing the essential processes of ejaculation. 
Spermatophore formation. The spermatophore is completely 
formed inside of that portion of the sexual duct called the sper- 
matophoric organ. This is a complicated series of continuous 
glands, in the lumens of which the forming mass is kept rotat- 
ing on its longitudinal axis. By this rotation the sperm mass, 
cement body, spiral filament, and the various enclosing mem- 
branes are spirally twisted and wrapped into position as the 
mass moves along the lumen of the organ. 
When fully formed, the whole spermatophore undergoes a 
shrinking process by which the elastic outer membrane is left 
in a state of high tension which makes the whole spermatophore 
turgid and ready to ejaculate. 
LITERATURE CITED 
Papers that mention Cephalopod spermatophores and spermatophorie or- 
gans are very numerous, but only a few have been cited in this paper. 
Drew, GILMAN A. 1911 Sexual activities of the squid, Loligo pealii (Les.) 
I. Copulation, egg-laying and fertilization. Jour. Morph., vol. 22. 
MarcHanp, WERNER 1907 Studien tiber Cephalopoden. I. Der minnliche 
Leitungsapparat der Dibranchiaten. Zeit. f. wiss. Zool., Bd. 86. 
Racovirza, Emine-G. 1894 Notes de Biologie. III. Moeurs et Reproduc- 
tion de la Rossia macrosoma. Arch. d. Zool. Exper. et Gen., (3), T. 2. 
Wituiams, Leonarp W. 1903(?) The anatomy of the common squid, Loligo 
pealii (Les.). Amer. Mus. Nat. Hist. 
