336 PEOCEEDINGS OF THK MALACOLOGICAL SOCIETi', 



NOTES ON SOME SLUGS FROM ALGIERS. 

 By "Walter E. Collinge, F.Z.S., 



Assistant-Lecturer and Demonstrator in Zoology and Comparative 

 Anatomy, Mason College, Birmingham. 



Bead June lifh, 1895. 



PLATE XXIII. 



The slugs here desci-ibod ai'o some very kindly forwarded to me by 

 Mr. W. Moss, of Asliton-under-Lyne. Amongst them are two new 

 species of Amalia and a single example of Arion, which I am terming 

 A. hortensis, Fer., although it is open to doubt if it really be that 

 species. 



1. Amalia ater, n.sp. 



Animal : Head, mantle, and dorsum black, sides of body scpia- 

 colourcd or dirty grey ; portion beneath the mantle white ; mantle 

 oval, with groove as in A. gag ales, only more pointed in front 

 (Fig. 2) ; foot-fringe deep black ; foot-sole white, excepting in the 

 anterior region, wlun'c it is similar to the sides of the body ; rugae 

 large. Length (in alcohol) 37 mm. 



Shell (Figs. 3« and 3J) almost circular, with triangular indentation 

 anteriorly. Length 2-5, breadth 2 mm. 



Externally Amalia ater is not unlike a very dark example of 

 A. robici, Simr., but the form of the generative organs is very 

 different. 



The free oviduct (Fig. 4, ov'.) is a long wide tube, becoming narrower 

 towards the external opening. The sperm-duct (Fig. 4, sp.d.) shows 

 a slight constriction at its commencement and again in the centre. 

 Its form is best seen in Fig. 5. The vas deferens passes off as a 

 narrow tube. There is a long receptacular duct (Fig. 4, r.d.) and 

 a large globose receptaculum seminis. 



2. Ajialia maculata, n.sp. 



Animal (Fig. 6) : Ground colour, dirty grey dotted with yellow, 

 posterior portion of body nearly black, with median yellow line 

 running along the keel. Groove on mantle oval-shaped; foot-fringe 

 and foot-sole yellowish brown. Length (in alcohol) 39 mm. 



Shell oval, thick. Length 2*5, breadth 2 mm. 



The chief points in the anatomy upon which I base the specific 

 distinctness of this species are : the peculiar form of the receptaculum 

 seminis (Fig. 8, r.s.), in which the duct seems to be absent, the gland 

 consisting of three dilated sacs ; the long, looped, free, oviduct 

 (Fig. 8, ov'.) and the spii'al twist in the common duct (Fig. 8). 



3. Elisolimax longicatjda, Fischer, 1882. 



There is a single example of this slug which may be referred to the 

 variety maculata, Fisch., and Avhich is probably identical with the var. 



