LIMAX CINEREO-NIGER. 55 
SHELL situated beneath the hinder part of the 
shield; somewhat quadrately oval, resembling in Pat 
size and shape that of Limax flavus ; thin, brittle, age Fic. 71. — Internal 
and almost transparent when fresh, whitish, slightly shell of L. cinereo- 
concave beneath, with lines of concentric increase, : ; Pike - ae Suth 
and a broad, brownish membranaceous fringe ; APEX a nde W. Baillie), 
or nucleus near to the left posterior angle. Length, 
8} mill.; breadth, 6 mill. 
INTERNALLY, the organization of Limax cinereo-niger resembles in general char- 
acter that of L. maximus, but in many points shows distinct evidences of an earlier 
type of structure. The SENSORY ORGANS though doubtless closely resembling those 
of the congeneric species, have never been critically studied in comparison with those 
of Limax maximus. 
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BiGerize Fic. 73. Fic. 74. Fic. 75. 
DETAILS OF THE INTERNAL STRUCTURE OF Limax cinereo-niger Wolf. 
Fic. 72.—Distal end of penis sheath, shewing the position of the dorsal attachment of retractor (after 
Scharff). #. kidney ; . penis sheath ; ~. retractor ; v.d. vas deferens. Fic. 73.—Spermatheca or recepta- 
culum seminis X 2. Fic. 74.—Otolith (after Schmidt), highly magnified. | Fic. 75.—Prostatic or sperm 
duct, shewing its follicular structure x 4, Fic. 76.—Albumen gland and hermaphrodite duct x 2. 
The REPRODUCTIVE ORGANS, though similar 
to those of its close ally, yet exhibit constant 
differences; they show a larger and more deeply 
coloured OVOTESTIS which occupies the caudal 
end of the body to the exclusion of other organs ; 
the HERMAPHRODITE DUCT is of a clear blnish- 
white, and without any apparent VESICULA 
SEMINALIS; ALBUMEN GLAND of an ochreous 
colour and usually smaller than the ovotestis ; 
OVISPERMATODUCT narrow, the creamy-white 
prostate usually wider than the oviduct ; FREE- 
OviIDUCT short, thick, and doubly flexed near the 
base; SPERMATHECA fusiform, mottled with 
reddish-amber and opaque ochreous-white and 
fixed by its crown to side of oviduct, the stem 
clear azure-white, about half the length of the 
vesicle ; PENIS-SHEATH greyish-white, very long, 
and nearly uniformly cylindrical or vermiform for 
its whole leneth, not distally swollen and rigidly 
flexed as in Limax maximus, with the clear-bluish- Fic. 77.—Sexual organs of L. cinereo- 
white VAS DEFERENS entering terminally; the — xége~ Wolf. 
RELRACTOR MUSCLE is long, broad, and ribbon. (Oswestry, Salop, Mr. Baker Hudson). 
oe BPs ais ae cee alb.g.albumen gland ; ov. oviduct ; of. 
like, attached to the extremity of the penis-sheath — Qyotestis; p.s. penis’ 72. retractor ; 
and to the dorsum between the heart and the — sg. spermatheca; 7.@. vas deferens. 
kidney, in a sinus of which the heart is situated. 
The ALIMENTARY CANAL shows a short diso- 
PHAGUS opening into a large, oval, and brownish 
CROP; SALIVARY GLANDS united at base and not 
easily separated from the walls of the erop ; be- 
yond the crop the canal narrows considerably, 
widening again at the stomach at the termina- 
tion of the first alimentary tract, where two or 
three bile duets enter from as many lobes of the 
reddish-brown LIVER or DIGESTIVE GLAND; the Fic. 78.—Kidney or renal organ and 
INGESTIVE or STOMACH TRACT also does not show — Peart of 4. czmereo-niger, x2. h, kidney. 
the extreme development posteriorly which is so marked a feature in the fully adult 
examples of Limax maximus. 
