242 ARION INTERMEDIUS. 
undergone are very similar to what is found in Al. civewmscriptus. The DIGESTIVE 
GLAND is greenish-yellow in colour, with its lobules not very coherent, and discharges 
into the STOMACH at the termination of the INGESTIVE TRACT. 
Fic. 244. Fic. 245. Fic. 246. Fic. 247. 
Alimentary and Reproductive organs of Avion intermedius Normand and A. mollerit Pollonera. 
Fic. 244.—Alimentary canal of A. intermedius Normand x 4. (Raheny, Co. Dublin). 
Fic. 245.—Reproductive organs of A. intermedius var. appenina X 2 (after Pollonera). 
Fic. 246.—Reproductive organs of A. #intmus Simroth X 3 (after Simroth). 
Fic. 247.—Proximal end of the Reproductive organs of 4. mol/er#i?, magnified (after Pollonera). 
The REPRODUCTIVE ORGANS are characterized by their simple outlines. The ovo- 
TESTIS is roundish, with dark purplish acini, and rests upon the upper surface of the 
digestive gland, just beyond the distal end of the stomach ; the HERMAPHRODITE 
puct is only very slightly sinuate, the proximal end thick ; VAS DEFERENS some- 
what short, enlarging into a moderately long and cylindrical EPIPHALLUS or 
spermatophore tract, without complications or windings, but which is furnished 
internally with longitudinally arranged rows of papilke, from which it may be 
inferred that the SPERMATOPHORE is serrate, as in Arion afer and A. subfuscus ; 
FREE OVIDUCT short and uniformly cylindrical ; the GENITAL RETRACTOR is not 
easily found, but is attached to the free oviduct and stem of spermatheca, as is 
usual in the genus; the SPERMATHECA is somewhat globular with a funnel-shaped 
stem; the three terminal organs open into a moderately large light yellow glandular 
ATRIUM, which is somewhat quadrilateral in figure. 
The MANDIBLE or jaw is very delicate, and less aa 
than a millimetre in width, slightly semi-lunar in 
shape, with attenuate but rounded ends, and of an 
amber colour, with five very broad but very feebly Fic. 248.—Mandible or jaw of 
convex ribs, which extend over the whole surface of A. intermedius Normand x 20. 
: Raheny, Dr. R. F._Scharff. 
the jaw, and give an undulate aspect to the lower or or or en Se 
eutting edge; a darker line extends medially across the jaw from side to side and 
parallel with the cutting margin, indicating the point of attachment of the elasma. 
The LINGUAL MEMBRANE is about two mill. long, and bears about ninety some- 
what curved transverse rows of teeth, each row composed of a distinetly trieuspid 
median tooth, the long and somewhat slender mesocone with lateral cutting expan- 
sions ; the lateral teeth are as usual practically and strongly bicuspid, the endoconic 
cutting point being obsolete ; they gradually pass by_a series of transition teeth to 
the true marginals, which are strictly bicuspid, the endocone being gradually lost, 
but in the few extreme marginals the embryonic character is retained, the denticles 
being wide and showing indications of one or more ectoconic denticles. 
a 1 
x. 
m 
Wo aoa op i j 6 ee eae i? 
al 4 ; /] ) 
YIN WS b 
ue 
Fic. 249.—Representative denticles from a transverse row of the lingual teethlof A. intermedius X 180. 
The animal collected by Dr. Scharff, and the palate prepared by Mr. W. Moss. 
The formula of a Raheny specimen collected by Dr. Scharff is 
8+$4+354+$+334+$4+8 x 98 = 6,390. 
