HYALINIA CELLARIA. 33 
The REPRODUCTIVE ORGANS show a light brown or whitish, slightly coherent 
OVOTESTIS ; the HERMAPHRODITE DUCT is thickest in the middle with opaque-white 
spots and specks, and is slightly convolute proximally, terminating im a simple 
VESICULA SEMINALIS; ALBUMEN GLAND linguiform, semitransparent, yellowish or 
reddish-amber, occasionally tinged with brown or green ; OVIDUCT narrow above, 
more ample below, and comparatively broader than in /H. lucida ; SPERM-DUCT or 
prostate opaque cream colour, and very conspicuous, of granular appearance, and 
variable width ; SPERMATHECA usually broadly oval, with reddish or purplish core, 
united to the oviduct by the muscle at the crown ; in younger animals the VESICLE 
is more elongate; the DUCT or stem is about double the Jength of the vesicle, 
doubly flexed, and gradually widening below ; in its 
natural position the duct lies across the free-oviduct, 
and one side of the vesicle is attached to the base of 
the oviduct, concealing the point of separation of the 
sperm-duct ; FREE-OvipUCT long and thick ; VAGINAL 
GLAND cream coloured or yellowish, surrounding the 
oviduct and base of the spermatheca- 
Jp duet; VAS DEFERENS very slender, but 
%/ after passing through the muscular 
‘ filaments, binding the base of the 
penis-sheath, it abruptly enlarges and 
é 
Fic. 61. Fic. 62. Fic. 63. Fic. 64. 
Fic. 61. —Reproductive organs of //. cellaria, X 3. p 
a.g. albumen gland; g. vaginal gland ; of. ovotestis ; ov. oviduct ; #7. prostate or sperm-duct ; /.s. 
penis-sheath, with distal epiphallus ; penial retractor ; sf. spermatheca ; v.d. vas deferens. 
Fic. 62.—Proximal end of the sexual organs of 17. cellaria, illustrating the relative positions naturally 
occupied by the various organs during life, x 5. ; ; 
ov. oviduct ; f.s. penis-sheath and distal epiphallus; sf. spermatheca ; v. vaginal gland; v.d. vas deferens. 
Fic. 63.—Enlargement of distal or epiphallial end of penis-sheath of //. cedlaria, showing structure 
as seen by transmitted light, x 6 (after a photo. by Mr. W. Moss). 
Fic. 64.—Base of the albumen gland showing the vesicula seminalis and its mode of junction with the 
ovispermatoduct and hermaphrodite duct in Hyalinia cellaria, X 6. 
v.s. vesicula seminalis; a.g. albumen gland. 
forms a white, elongated expansion or lumen, ornamented by a series of opaque 
milk-white streaks, and diminishing gradually in calibre as it approaches the penis- 
sheath, but the enlarged section is nearer the latter organ than it is in lucida, and 
discharges nearer the free-end of the epiphallus, to which it is fused for a short 
distance: the EPIPHALLUS is slightly fusiform, and is internally ridged and also 
beset with two or more longitudinal rows of rounded depressions, the junction with 
the penis-sheath being indicated by an indistinct constriction ; the PENIS-SHEATH 
is slightly but gradually widened below, but there is no indication ot the marked 
and abrupt contraction at the junction with the vestibule, which is so conspicuous 
in H. lucida, the combined organ is naturally curved, somewhat like a scimiter, 
and is of a pearly-white colour, with opaque-white streaks and spots ; the long and 
filiform PENIAL RETRACTOR is terminal and attached to the upper section of the 
oviduct ; VESTIBULE or atrium short. 
The MANDIBLE or jaw is of the usual erescentic 
type, of dark amber colour, becoming deep brown in 
the thicker parts, and nearly a millimetre across ; 1t 
is strongly areuate from front to back, with bluntly 
rounded but somewhat falciform ends ; concave cutting se come Ae et ti c 
margin with a broad and prominent median projection oe Sool NEOs gE) 
or beak ; in the specimen figured the line of insertion (Christchurch, Mr. C. Ashford). 
in the tissues is cleft in the centre. 
The LINGUAL RIBBON is nearly three mill. long, and of the usual oblong shape 
generally composed of about thirty-three arcuately trausverse rows of teeth, ene 
row formed by a small tricuspid median tooth, cramped between two noticeably 
18/12/06 Cc 
