LIMAX FLAVUS. 1) 
Original Description.—LIMAX flavus. 7. L. flavus maculatus. Fn. Svec. 2092. 
List. exercit. anat. 1. t. 1. Limax succini colore, albidis maculis insignitus. Habitat 
inter Herbas (Linn., Syst. Nat., ed. x., p. 652, 1758). 
Description.—ANIMAL with a long but somewhat stouter body than the con- 
generic species, and varying from 75 or 80 mill. to 100 or more mill. in length when 
extended ; BODY rounded above, but keeled at the caudal extremity, usually of a 
dusky amber- yellow colour, ov erspread by grey, with the exception of certain rugee 
which remain yellow and are distributed over the body singly or in combination ; ; 
FOOT-SOLE longitudinally trifasciate, whitish with a faint “tinge of yellow, some- 
times narrowly margined with dusky- yellow ; BODY-SLIME thin and light-yellow in 
health, but dark-y ellow, viscid, and copious when scalded; on removal of the mucus 
after scal ling, the SKIN is seen to be of a dusky-grey ; SHIELD narrow and rounded 
in front, broader and very obtusely angulated beliind, of a 
dusky yellowish- grey colour, with many ‘oval yellowish spots, 
paler towards the margins ; RESPIRATORY ORIFICE posterior, 
surrounded by a raised and finely-spotted ring, broken an- 
teriorly by the anal and renal fissures; inside of pulmonary 
cavity whitish ; OMMATOPHORES stout and rather long, of a : 
bluish colour, due to the colour of retractor muscles ; LOCO- Fic. 96. — Respiratory 
MOTORY MUCUS plentiful and iridescent ; the SUPRA-PEDAL — °rifice of L. flavus, x 3, 
GLAND has its bilaterally symmetrical halves arranged on “P0wing the anal canal. 
either sides of the median-line, but does not extend into the tail, and, according to 
Rolleston, is underlaid by a laree venous sinus, very visible in the living animal along 
the median-line of the foot. 
SHELL subquadrately oval, thin, white, and con- 
eave beneath, with corresponding convexity above; 
APEX or nucleus placed a little distance from the 
posterior margin and slightly to the left side, the Cen erences 
concentric lines of increase usually well but not “Hants Sats 
sharply marked ; periostracal fringe broad and often : Mr. C. Ashford). 
somewhat calcified. Leneth, 9 mill. ; breadth, 6 mill. 
INTERNALLY, the NERVOUS SYSTEM has slightly reniform or bilobed buceal ganglia 
with short connecting commissure; the OSPHRADIUM Is in the form of a broad e¢ hannel 
on the underside of the mantle roof, and extends from the respiratory orifice far over 
towards the left. 
Fic. 97.—Internal 
shell of Z. flavus, 
a) 
The REPRODUCTIVE ORGANS are not complex, and do not possess accessory organs. 
The OVOTESTIS is situate behind the stomach, and is light-coloured or brownish, often 
with large elements; the DUCT is white, slender and very tortuous, terminating in a 
small and round VESICULA SEMINALIS; ALBUMEN GLAND multilobed, flaky, and of a 
white or deep-yelfow colour, increasing vastly in size at rutting time; the SPERM 
Fic. 98. Fic. 99. Fic. 100. 
Fic. 98.—Penis-sheath and oviduct of Lzmax flavus, laid open to show the internal structure, 
enlarged (after Simroth). v.d. vas deferens; /. penis; sf.d. spermatheca duct ; ov. oviduct. 
Fic. 99.—Sexual organs of Limax flavus. alb.g. albumen gland; 4. heart; &. kidney; ov. 
oviduct ; of. ovotestis ; ~. prostate ; pS. penis- sheath 3 7.772. retractor muscle ; sp. spermatheca. 
Fic. 100. —Hermaphrodite duct at junction with vesicula seminalis of Z. //awus < 10 (after Scharff). 
