LIMAX CINEREO-NIGEll. 



55 



Frc. 71. — 

 sliell of L. 

 nigcr X \\. 



( Brora, E. 



Internal 

 cinereo- 



Suther- 



land, Mr. W. Baillie). 



Shell situated beneath the hinder part of the 

 shield; somewhat quadrately oval, resembling in 

 size and shape that of Limax flaviis ; thin, brittle, 

 and almost transparent when fresh, whitish, slightly 

 concave beneath, with lines of concentric increase, 

 and a broad, brownish membranaceous fringe ; APEX 

 or nucleus near to the left posterior angle. Length, 

 8} mill. ; breadth, 6 mill. 



Internally, the organization of Li/iinx cinereo-niaer resembles in general char- 

 acter that of L. mru-iiiiiis, 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 corriparison with those 

 of Lliiiru: maxiiniifi. 



Fig. 72. Fig. 73. Fig. 71 Fig. 75. Fig. 76. 



Detail.s of the Internal Structure ok Limax cinereo-ni^er Wolf. 

 Fig. 72. — Distal end of pehk sheath, shewing the position of the dorsal attachment of retractor (after 

 Scharflf). k. kidney ; p. peni.'? sheath ; r. retractor ; v.d. vas deferens. P'lG. 73. — Spermatheca or recepla- 

 ciilum seininis X 2. FiG. 74. — Otolith (after Schmidt), highly magnified. Fig. 75. — Prostatic or sperm 

 duct, shewing its follicular structure X 4. FiG. 76. — Alhumen 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 tlie caudal 

 end of the body to the exclusion of other organs ; 

 the HERMAPHRODITE DUCT is of a clear bluish- 

 wdiite, and without any apparent vesicula 

 SEMINALIS ; albumen GLAND of an ochreous 

 colour and usually smaller than the ovotestis ; 

 OVISPERMATODUCT narrow, the creamy-wliite 

 prostate usually wider than tlie oviduct ; frek- 

 OVIDUCT short, thick, and doubly flexed near the 

 base ;' SPERMATHECA fiLsiform, mottled with 

 reddish-amber and opaque ochreous-wliile and 

 li.xed by its crown to side of oviduct, the stem 

 clear azure-white, about half the length of the 

 ve.sicle ; ruNIs-SHEATH greyish- white, very long, 

 and nearly uniformly cylindrical or vermiform for 

 its whole leiifjth, not distally swollen and rigidly 

 flexed as in ii«iax «ir(,)'M)i«.s, with the clear-bluish - 

 white VAS DEFERENS entering terminally ; the 

 RETRACTOR MUSCLE is long, broad, and ribbon- 

 like, attached to the extremity of the penis-sheath 

 and to the dorsum between the heart and the 

 kidney, in a sinus of wdiich the heait is situated. 



The ALIMENTARY CANAL sliows a sliort CESO- 

 PHAGUS opening into a large, oval, and brownish 

 CHOP; SALIVARY GLANDS united at ba.se and not 

 easily separated from the walls of the crop ; 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 ducts enter from as many lobes of the 

 reddish-brown LIVER or digestive GI-AND ; the 

 INGESTIVE or stomach TRACT also does not show 

 tlie extreme development posteriorly which is so marked a feature in the fully adult 

 examples of Limax ma.ciinus. 



FiG. 77. — Sexual organs oi L. cine?-ec- 

 nig-er Wolf. 



(Oswestry, Salop, Mr. Baker Hudson). 



alb.g. albumen gland ; m'. oviduct ; ot. 

 ovotestis; p.s. penis; r.m. retractor; 

 sp. spermatheca ; v.d. vas deferens. 



Fig. 78. — Kidney or renal organ and 

 heart of Z.. ciiicyco-nlger, x2. k. kidney. 



