822 
CLASS XIII. 
been developed in its own proper vesicle within the larger bladder, and 
of which the remains continue attached at the extremity of the hee- 
tocotylus after it has allowed the filament to escape). The filament is 
tubular, its cavity is continuous with that of the hectocotylus, and is 
open at its extremity. The tube of the elongated pouch runs in the 
central cavity of the hectocotylus and of its continuation, the fila- 
ment, and opens at the extremity of the latter externally. The 
pouch or sac is found, when the hectocotylus is fully developed, to 
contain a spermatophore, and it was the presence of spermatozoa 
and of an organ apparently for the secretion of them in the interior 
of the hectocotylus, when found attached to the respiratory cavity of 
the Argonauta, that induced KoxELLIKER to suppose the Hectocotylus 
to be the male of the Argonauta. H. Murtier found this Hectoco- 
tylus in its state of imperfect development on that male, which is 
much smaller than the female, and has no shell’. The hectocotylus 
arm is the second of the left side in A. Argo, the third of the right 
side in Octopus granulosus, (Tremoctopus Carena VER.) whilst the 
hectocotylus only, and not the male of T'remoctopus violaceus DELLE 
Curse, has hitherto been discovered. 
The sexual organs of the hectocotyliferous males are constructed 
on exactly the same plan as those of the males of ordinary Cephalo- 
pods. The vas deferens opens at last into the respiratory sac, so 
that the idea of a communication between it and the sac of the hec- 
tocotylus arm, entertained by some, is untenable. How then is the 
spermatophore transferred to this sac? Voer’ thinks that the spot- 
ted pocket (the bladder in which the hectocotylus was originally de- 
veloped, and which is now turned inside out, with a fissure 
through which the arm has passed) serves as a receptacle for the 
spermatophore, which has been transferred to it by the long filament 
of the hectocotylus embracing it; at the same time he denies the ex- 
istence of the muscular sac in the interior. LeucKkarr’, however, 
has established the existence of this last, and has found a communi- 
cation between the spotted bladder and the side of the muscular sac 
attached to it, namely a canal by which they communicate. It is not 
1 See H. MurtuER Veber das Ménnchen von Argonauta Argo und die Hectocotylen, 
SIEBOLD u. KoLiikEr’s Zeitschr. fiir wissensch. Zool. tv. 1852, pp. I—35, Pl. 1. did. 
Pp. 346—359- 
2 Virany et Vocr Sur la nat. des Hectocotyles, Ann. des Sc. nat. T. XVI. pp. 148, 
191, Pl. 6—9, at p. 155. 
3 Leucxart Die Hectocotylie von Octopus Carena, Zool. Untersuch. Heft 111, Gies- 
sen, 1854, pp. 9I—I09, Tab. 2, at p. 103. 
