294 THE CEPHALOPODA. f. 258. 



The Eggs, at their escape from the ovary, are oval, and have a yellow, or 

 rose-colored vitellus, containing a germinative vesicle and dot. 



The vitelline membrane has transverse and longitudinal folds on it3 

 internal surface, which extend into the vitellus, — giving the eggs a 

 reticulated aspect.'^' 



The Spermatic particles are very active, of a cercarian, or a simply 

 eapilhxry form, and, as a whole, give the sperm a white color. Those of a 

 cercarian form are proper to the Loligina, and consist of a cylindrical 

 body to which is rather abruptly attached a small and pretty long tail.*^' 

 Those of a capillary form are found with the Octopoda, not only with the 

 males of Octopus and Eledone, but also with Hectocotylus.'-^^ 



§ 258. 



The Ovary, always simple, is situated, at the base of the sac of the 

 mantle, in a solid envelope (ovarian capsule) of a round or oblong form, 

 and derived from the peritoneum. At its circumscribed point the proper 

 ovary commences as a multi-lobulated body filling its cavity.*^' The eggs, 

 which are developed in the parenchyma of these lobes, appear first as round 

 prominences ; they gradually increase, and, finally, are attached to the ovary 

 only by a small peduncle. At this epoch the ovary furnishes them with a thin 

 envelope (egg-capsule), through which, in the mature eggs, the reticulated 

 folds of the vitelline membrane can be seen.'-* When the eggs are fully 

 matured, their capsules burst, and they fall into the ovarian capsule, after 

 which, their proper capsules fade and finally disappear.'"' From the ovarian 

 capsule they pass into the oviduct through an infundibuliform opening ; but, 

 beside this opening, some Octopoda have also two others belonging to an 

 aquiferous canal, and which, perhaps, play an important part in the fecunda- 

 tion of the eggs.'^* The oviduct is simple, or double, and extends directly 

 in front opening at the base of the funnel near the rectum. With Argo- 

 naiita, and Tre/noctopics, alone, the two female genital orifices are situated, 



1 See Kblliker, Eatwickelungggesch. &c. p. 1, 9, 1 Cnvier, Mem. p. 31, PI. IV. fig. 6, a. b. , Fan 

 Taf. I. fig. 9-12. These longitudinal and transverse Beneden, \oc. cit. PI. V. fig. 2, a.; DeZ/e Chiaje, 

 folds have been obsei-ved in the eggs of Sepia and Descriz. Tav. XIV.-XVI., and Grant, Trans, of tlie 

 Sepiola ; the longitudinal only are found in those Zool. Sue. I. PI. II. fig. 9 {Octopus, Ar^onauta, 

 of Argonauta, Tremoctopus, Octopus, Eledone, Eledone, Lotigo, and Loligopsis). 



&c. -2 Delle Chiaje, Descriz. Tav. XV. fig. 15, and 



2 See my Beitrage z. Naturgeschichte d. wir- Kiilliker, Entwick. &o. Taf. I. fig. 9 (Hepia) ; 

 bell. Thiere, in the Neuesten Schrift. d. naturforsch. Cams, Erlauterungstaf. Hft. V. Taf. II. fig. 9 

 Gesellsch. in Danzig. III. 1839, Hft. II. p. 54, Taf. {Eledone). 



II. fig. 47 (Loligo) ; Milne Edwards, Ann. d. Sc. 3 With Sepia, the dehiscence produces a rent with 



Nat. XVIII. 1842, p. 337, PI. XII. fig. 6, PI. XIII. irregular borders {Kblliker, loc. cit. p. 13) ; with 



fig. 7 {Lolii;o and Sepia), and Peters, in Muller''s Rossia, and Sepiola, a simple round opening. 



Arch. 1842, p. 334, Taf. XVI. fig. 14 {Sepiola). which, with Nautilus, according to a figure <.f 



It is easy to observe the development of the Owen''s, has crenulate borders, and, according t > 



spermatic iJarticles in the testicles. According to Delle Chiaje, is regularly denticulated with Ele- 



my observations, the daughter-cells in the mother- done ; see Grant, Transact. loc. cit. I. p. 84, I'l. 



cells, are developed into as many spermatic parti- XI. fig. 12, and Owen, Ibid. II. PI. XXI. fig. 18, 



cles the tails of which rupture one of the thin sides also. On the Nautilus, p. 42, PI. VIII. fig. 9, c. c, 



of the mother-cell. or Isis, p. 35, Taf. III. or Ann. d. Sc. Nat. p. 142, 



3 Milne Edwards (loc. cit. PI. XIII. fig. 11, PI. PI. IV. fig. 9, c. c, and Delle Chiaje, 16c. cit. Tav. 



XIV. tig. 5), has erroneously figured the spermatic LV. (3) fig. 15. 



particles of Octopus and Eledone with a very ■* These two aquiferous canals form a communica- 



large body ; for it is only a small button-like en- tion between the ovarian capsules and the aquifer- 



largement; see Valentin, Repert. 1837, p. 140, ous cells surrounding the branchial hearts (§ 250). 



and Philippi, in Midler's Arch. 1839, p. 308, Taf. They are found with Octopus, Eledone, and 7Vc- 



XV. fig. 11. This last has represented the tail of moctopus ; see Krohn, in Muller's Arch. 1839, i>. 

 thatof£/erfone too short. 357; Kblliker, Entwick. &c. p. 11, and Delle 



I have found the spermatic particles of Hecto- Chiaje, Descriz. Tav. XV. fig. 1, q. {Tremocto- 

 cotylus tremoctopodis to be exactly like those of pus). 

 Eledone. 



