162 
HELIX — REPRODUCTIVE ORGANS. 
iglit dorsal tentacle, wliose retractor muscle passes between and 
separates the male and female organs ; a 
powerful retractor muscle also arises from the 
distal end of the penis sheath and is attached 
medially to the door of the lung chamber. 
The Spermatheca is a red-brown globular 
vesicle, fixed by its neck to the distal end 
of the ovispermatoduct and also complicated 
by the attachment of a muscle from the 
columellar retractor; it opens into the upper 
jiart of the vagina, by means of a long 
hollow stalk, which gives off about midway 
a long and thick cmcal diverticulum, about 
the same length as the flagellum, which is 
fixed terminally at the base of the albumen 
gland, and within which is lodged the spermatophore received during 
])airiug from its i)artner in the sexual act. 
d’he mucous glands or multibd vesicles, are paired tufts, each 
c()mj)o.sed usually of 
about 2.1 tassel -like 
tubular glands, wliicli 
open into the vagina 
below the si)ermatheca ; 
V . . Fig. 327. Fig. 328. 
their secretion is rich Digitate Mucous Glands of Helix as^crsa X 2. 
1 • 1 , Fig. 327. — An unusually ramose gland, bearing 16 branchlets. 
HI CUlClC Sll n.StcHlCt'S, 323. — A very sparsely digitate one, with 14 branchlets only. 
Fig. 326. — Portion of the Re- 
productive organs of Helix 
showing the separation 
of the male and female organs 
by the retractor muscle of the 
right ocular tentacle X 3. 
o. right ommatophore and its 
retractor ; p.s. penis sheath ; 
7’. vagina ; t. lower tentacle and 
retractor ; g.o. common genital 
orifice. 
wliich have been assumed to assist in forming the outer egg envelope. 
'I'he large, iiyriform, muscular dart sac or Stylophore is situate just 
beneath the i)aired mucous glands and ojiens into the vagina slightly 
above the vestibule or atrium, and serves for the inotection of the 
dart, which it also secretes and protrudes. It is formed chiefly of 
two layers ; a thick, translucent, greyish- white outer coat, compo.sed 
of annular and longitudinal muscle fibres, and a thinner and more 
vascular inner layer ; the less muscular distal end bears a small sub- 
conical tubercle with some closely api)osed longitudinal rods at its 
sides, which serves as the point of attachment for the base of the 
Dart or spiculum amoris, whose point is thus directed towards the 
aiierture. This curious weapon, which is soft and flexible when 
removed from the sac, has a slightly curved, hollow, calcareous, and 
])oiuted stem, somewhat expanded at the base, which fits upon and is 
