260 
THE CEPHALOPHORA. 
$ 227, 
The Uterus is very often a long, large canal, with transversely plicated 
glandular walls; it is distinctly separated from the ensuing vagina, but 
often, also, it is only a simple dilatation of the oviduct,*? which is some- 
times insensibly continuous with the vagina. 
This last communicates 
usually with the excretory duct of a pyriform vesicle, which, as a Recepta- 
culum seminis, is filled with fresh 
procreation.“ 
deverticulum.™ 
as a muciparous or an uterine gland. It is tongue- 
shaped with nearly all the Pulmonata (see the 
figures of Cuvier, Treviranus, Erdl, Paasch, ke. 
loc, cit.). It is a round, glandular body with 
Thetis, Tritonia, Umbrella, and Gasteropteron 
(H. Meckel, loc. cit. Taf. XV. fig. 1,12, 15, 17). 
According to Aélliker, there is with Rhodope, 
and Lissosoma, a similar gland annexed to the 
uterus ; and without hesitation I should pronounce 
as of the same nature, the glandular body which 
Allman (loc. cit. Pl. VI. y.) has regarded as a tes- 
ticle with Actaeon. With Doris, Aplysia, and 
Diphyltidia, it is a twisted knotted tube (H. Meck- 
el, loc. cit. Taf. XV. fig. 2, 7, 16).* 
10 Such is the case with the Pulmonata (see the 
figures of Cuvier, Treviranus, Erdi, Paasch, 
&c.). Undoubtedly the glandular walls of this 
uterus secrete the calcareous crystals which incrust 
the eggs of many Helicina (see Turpin, Analyse 
microscop. de l’oeuf du limacon, in the Ann. d. Se. 
Nat. XXV. 1832, p. 426, Pl. XV.), or which supply 
the gelatinous substance enveloping in the form of 
a cylinder or a disc the eggs of the Lymnaeacea 
(Pfeiffer, Naturg. deutsch. Land-und Susswasser. 
Mollusken, Abth. I. Taf. VII, VILL). 
ll With the Pteropoda, the common exeretory’ 
duct of the hermaphrodite gland, before passing 
into the vagina, has one or two dilatations, the 
inferior of which corresponds perhaps to an uterus 
(Van Beneden, Exerc. zoot. loc. cit, Pl. III. fig. 
18, e. IV. A. fig. 6, d. and B. fig. 4, d. Hyaleq, 
Cleodora, and Cuvieria). With ¢ Clio, Cymbulia, 
and Limacina, it is not yet determined whether the 
dilatation which is here found belongs to the defer- 
ent canal or to the oviduct, and therefore the name 
of uterus cannot be given to it. 
12 The uterus is short and is directly continuous 
with the vagina with the Nudibranchia, Infero- 
branchia, Tectibranchia (H. Meckel, loc. cit. Taf. 
XY.), and perhaps also with the Apneusta. I am 
yet undecided if in this undeveloped uterus are 
formed the envelopes which, in the form of a riband, 
acord, or a capsule, surround the eggs of the Nudi- 
branchia, the Tectibranchia, and the Apneusta. 
Thus with Aplysia, Doris, Tritonia, Aeolis, &c., 
their spawn has the form of a riband or cord ; and 
with Glaucus, and dctaeon, it is wound in a 
spiral manner about various objects ; while with 
Tergipes, it is attached to marine plants under the 
form of kidney-shaped capsules with short pedun- 
cles. With T'ritonia, Adeolis, and Aplysia, there 
is observed the remarkable fact that there are 
several vitelluses each surrounded by an albumin- 
ous layer, in one and the same envelope; see 
Sars, in Wiegmann’s Arch. 1837, I. p. 402, 1840, 
I. p. 196, Taf. V.-VII.; Van Beneden, Ann. a. 
Sc. Nat. XV. 1841, p. 123, Pl. I.; and Loven, in 
Isis, 1842, p. 359. 
* [ § 227, note 9.) For the muciparous appa- 
ratus with the Nudibranchiata, see Alder and 
Hancock, loc. cit. Part IL. Pl. IV. fig. 15, (Doto) ; 
Part IIL. Pl. VIII. fig. 2, g. g. (Zolis); Part IV. 
PL V. fig. 8,i. (Eumenis); Part V. Pl. II. fig. 7, 
h. h. ‘Doris); also Hancock, Ann. Nat. Hist. VIII. 
1851, p. 34, Pl. IIT. fig. 6, g. (Antiopa). See also 
sperm directly after the epoch of 
This vesicle has, moreover, sometimes a lateral, caecal 
13 This Receptaculum seminis was formerly 
designated under the name of pedunculated vesi- 
ele; although Treviranus regarded it as an 
urinary bladder, and, with Arion, erroneously 
assigned to it a communication with the kidney 
(Zeitsch. f. Phys. I. p. 10). However, there can 
now be no further doubt as to its nature, for if its 
contents are examined shortly after coition, they will 
easily be found to consist of fresh sperm containing 
fully-developed, active, spermatic particles. Later 
than this, when the eggs have been deposited for a 
time, the sperm will be found to have lost its fresh- 
ness, and to have changed into a viscous granular 
substance of a reddish or brown color, containing” 
sometimes traces of dead, rigid spermatic particles- 
The resemblance of this matter then to excrement. 
is, without doubt, the reason why this organ has. 
been compared to an urinary bladder, or con- 
founded with the sac for purple (kidney) of other 
Cephalophora. 
With the Pteropoda, this organ is a pyriform 
vesicle with a short peduncle, —at least with Clio 
(Eschricht, loc. cit. Tab. ITI. fig. 25, s. ), Cym- 
bulia, and Limacina (Van Beneden, Exer. zoot. 
loc. cit. Pl. I. fig. 17, d. V. fig. 12, A., where this 
organ is figured as a sac for purple). The Ap- 
nuesta, also, have a sac for fecundation ; at least I 
can give no other name to a Jong-pedunculaied,. 
pyriform vesicle which Nordmann (loc. cit. p. 49, 
Tab. II. L., III. fig. 5, b. d.) has described as a 
testicle with T'ergipes ; and so much the more as 
he always found perfect spermatic particles, and 
not developing seminal cells. 
The pedunculated vesicle with its semi-liquid 
contents, which Al/man (loc. cit. p. 152, Pl. VI. §.} 
has observed with Actaeon, is also a Receptaculum 
seminis. 
According to Kélliker, this organ exists also 
with Flabellina, and Rhodope, as a pedunculated. 
vesicle communicating with the lower extremity of 
the vagina. The excretory duct of this organ is 
short with Thetis (Cuvier, loc. cit. fig. 7, ¢. 5 
Delle Chiaje, Descriz. loc. cit. Tav. XLVII. fig. 
1, s.), Aplysia (Cuvier, loc. cil. Pl. IV. y 3 Delle 
Chiaje, Memor. loc. cit. Tav. IV. fig. 1, p.), and 
Pleurobranchaea (H. Meckel, loc. cit. Taf. XV. 
fig. 5, n. fig. 1, q. 7.0.). It is longer with Scy/- 
laea, Bulla, Bullaea (Cuvier, loc. cit. fig. 5, 1. fig. 
10, i.), Doridium, Tritonia, Umbrella, Diphyl- 
lidia (H. Meckel, loc. cit. Taf. XV.), and Notar- 
chus (Delle Chiaje, Descriz. loc. cit. Tav. LXIV. 
fig. 5, n.). In the Pulmonata, this peduncle is. 
very long with Hediw, and Clausilia ; less so, with 
Lymnaeus, Planorbis, Bulimus, and Physa, 
and pretty short with Limaz, Arion, and Suc- 
cinea (see the figures of Cuvier, Wohnlich, 
Treviranus, Erdl, and Paasch, loc. cit.).t 
14 This deverticulum exists with many Helicina, 
De St. Simon (Observations sur l’organe de la 
Glaire des Gastéropodes terrestres et fluviatiles, in 
the Jour. de Conchol. 1853, p. 1); this author is 
very minute in his details on the. color, form and 
size of this organ, with these animals. — Ep. 
t [§ 227, note 13.) This receptacle is the organ 
called genital bladder by Leidy, and which he 
