ae 
276 HELIX NEMORALITS, 
The REPRODUCTIVE ORGANS are of the same general character as in the other 
species of the restricted group; the OVOTESTIS is imbedded in the digestive gland 
quite at the apex of the shell; the long dull 
yellowish - white HERMAPHRODITE DUCT 1s 
simple and slender at its origin and at its 
junction with the large VESICULA SEMINALIS; 
the voluminous intermediate tract is com- 
pactly convoluted ; the ALBUMEN GLAND is 
ample, large and yellow, or greenish-amber in 
colour; the saceulate and ample OVIDUCT is 
reddish-buff, and the PROSTATE or sperm duct 
is follicular in structure ; FREE OVIDUCT and 
VAGINA purplish-brown ; SPERMATHECA of a 
reddish flesh colour, borne on an exceedingly 
long and dark-brown duet, which shows a 
nascent eczecal diverticulum towards the free- 
end, where it becomes of a pinkish-brown ; the 
VAS DEFERENS joins the deeply-pigmented 
male organ at the base of the long and slender 
dark-brown FLAGELLUM; the EPIPHALLUS is 
short and is continuous externally with the 
purple-black PENIS SHEATH, which gradually 
enlarges, but contracts somewhat abruptly 
before its entry into the ATRIUM, the retractor 
muscle indicating the limits of the eversible 
portion of the organ; the paired MUCUS 
GLANDS are nine to twelve mill. long, placed 
as usual on the free oviduct above the dart 
sac or stylophore, and each of which divides 
early into two or more slender, nearly eylind- 
rieal whitish eczeea, and though the whole 
number may vary between three and nine, 
the most usual arrangement in this country 
is three digitations on one side and two on 
Fh nN hea. 
& 
r. 
Fic. 330.—Reproductive organs of Helix 
nemoralis Linné. 
a.g. albumen gland; a.s. dart sac or 
stylophore ; 77. flagellum ; /.g. ovotestis or 
hermaphrodite gland; #2. vaginal mucus 
glands ; ov. oviduct ; g. penis sheath ; sf. 
spermatheca ; 7 penis retractor; va. vas 
deferens. 
the other; the STYLOPHORE or dart-sae is simple and subclavate in form, white 
in colour in adolescence and before secretion of the dart, becoming of a dull livid 
blnish-grey when adult; the thick outer envelope is usually greyish-white, tinged 
with a warmer shade, the livid aspect of the organ being probably due to the 
densely-pigmented inner coating and to the general darkening of the organs at 
sexual maturity. 
The GYPSOBELUM or love 
dart, which is slightly plastic 
when first removed from the 
sac, is seven to eight mill. in 
length, straight, but with its 
maximum breadth about the 
middle, and furnished with 
four sharp slightly transparent 
longitudinal blades, of which 
two are more prominent than 
the opposite pair, and are con- 
nected together transversely 
by a variable number of some- 
what transparent crescentic 
films, which usually disappear 
Fic. 331. 
on a short exposure to a 
Fic. 332. Fic. 334. 
aS : Fic. 331.—Immature Gypsobelum or Love-dart of Helix 
heated solution of caustic y,,,o¢aZis Linné, before the development of the transverse 
potash ; the base is conieally — septa, x 4. 
expanded and surrounded by Fic, 332.—Mature Gypsobelum or Love-dart, bearing fully- 
an annulus composed of six- developed Piedseiene septa, X 4, with diagrammatic sections 
ig . . : showing its structure. 
=] ) Put ( , ~ "996 r ” 
ue ae to Siepeen I petal Fic. 333.—Base or ‘‘ Krone” of the dart. x 6. 
rods around a purple core. Fic. 334.—Section through base of Stylophore or Dart-sac, 
The SPERMATOPHORE, which 
5 Sea dart rests, X 6. 
is secreted within the flagellum pk 
showing its various layers and the papilla upon which the 
and epiphallus, is a slender filament, thirty to forty mill. long, with an enlarged 
and hollow but soft-walled anterior median portion, distended by a whitish 
— < 
