$ 259. 
296 THE CEPHALOPODA. 
in the sea. With those of Argonauta and Tremoctopus, the envelope 
is composed of a solid, homogeneous, colorless substance. and at their pointed 
extremity there is a small filament; these filaments being entangled to- 
gether, the eggs form large botryoidal masses. Argonauta attaches these 
bunches to the convex portion of its shell ;° but Tremoctopus, with which 
‘these masses are in chaplets, forms them into a staff-like structure, by 
means of a tissue of leathery consistence, secreted for this purpose.“ With 
the other Cephalopoda, the eggs are arranged in tubes or in fillets. 
§ 259. 
The simple, round, or oblong, whitish Testicle, is situated, in most 
species, at the bottom of the cavity of the mantle. It is surrounded by a 
capsule derived from the peritoneum but adherent to it only at one point. It 
is composed of numerous ramified cylinders, converging from the periphery 
towards the centre, which is occupied by a narrow irregular cavity. 
The sperm is formed in the intervals of the cylinders and thence passes 
into the deferent canal, which, at its passage from the testicular capsule, is 
narrow and very flexuous, but suddenly dilates at its upper extremity, — 
where its walls are thick and glandular, and have a longitudinal fold on 
their internal surface. 
This glandular portion of the Vas deferens receives the orifice of an 
equally flexuous caecum, which is probably an organ of secretion; and 
terminates, finally, in a large sac with muscular but thin walls which are 
plicated longitudinally. This sac, known as the Bursa Needhamii, is 
followed by a fleshy tube (Ductus ejaculatorius), which extends directly in 
- front and projects, as a short penis, into the cavity of the mantle near the 
rectum.” 
With the Loligina, and with Octopus, and Eledone, the sperm is not freely 
evacuated, but is enclosed in very complicated organs (Spermatophores), 
which, at the epoch of procreation, accumulate in abundance in the Bursa 
Needhamii, and are large enough to be seen with the naked eye. They are 
always cylindrical and consist of a homogeneous, colorless, solid tube, round 
at the anterior extremity, but at the posterior end, somewhat constricted and 
then dilated into a kind of sphere. Hach of these Spermatophores contains 
two kinds of organs: a very thin sac filled with spermatic particles, and an 
apparatus to project these particles outwards. 
The Sperm-sac always contains fully-developed spermatic particles 
bundled together: it nearly entirely fills the cavity of the tube, through 
12 These chaplets are long with Loligo vulgaris, 
and short with Sepioteuthis ; see Burdach, De 
quibusd. anim. marin. p. 155, Tab. XIL.; Férus- 
‘sac, loc. cit. Loligo, Pl. X. fig. 1, 19, and Kalliker, 
loc. cit. p. 14. 
18Rang, Magaz. d. Zool. 1837, V. Taf. LXX XVII. 
UXXXVIIL.; Feérussac, loc. cit. Argonauta, Pl. 
1.3. 
14 This body has a peculiar structure, and un- 
doubtedly, is made by the animal itself. It is 
composed of numerous, superposed, very distinct 
layers of a granular, probably coagulated sub- 
stance ; — forming a kind of staff or baton by which 
the eggs are bound together in groups ; for, accord- 
ing to Kélliker (loc. cit. p, 14), it (T'remoctopus) 
carries the entire mass attached to the suckers of 
-one of its arms. 
15 See Quoy and Gaimard, Ann. d. Sc. Nat. 
XX. 1830, p. 472, Pl. XIV. B., and Ferussac, 
loc. cit. Octopus, Pl. XXVIIL. fig. 8. 
1 For the male genital organs of Octopus, see 
Cuvier, Mém. loc. cit. p. 32, Pl. IV. fig. 5; he 
regards the upper glandular portion of the deferent 
canal as a Vesicula seminalis, and the coecum 
appended ‘to it as a Prostata. See, also, Delle 
Chiaje. Descriz. Tav. VI. fig. 2, Tav. XI. fig. 2, 3, 
Tav, XII. fig. 28 (Octopus, Sepia and Loligo) ; 
Wagner, Icon. zoot. Tab. XXIX. fig. 22 (Octopus) ; 
Peters, in Miller’s Arch, 1842, p. 332, Taf. XVI. 
fig. 2, 3 (Sepiola), and especially the beautiful: 
figure of those of Sepia by Milne Edwards, in 
the Ann. d. Sc. Nat. XVIII. 1842, p. 344, Pl. XV 
