PLATES V & VI {continued). 



0. Convoluted tube, in wliich are combined the oviduct and vas 

 deferens. 

 od. Oviduct after its separation from llie vas deferens. 

 vd. Vas deferens. 

 J). Penis. 



rp. Retractor muscle of penis. 

 rp'. Additional muscle in L. Sowerbii. 



c. Cloaca! chamber. 

 g. MultiQd vesicles. 



d. Dart-sac. 

 /. Flagellum. 



Jl'. Trifurcate gland of L. agrestis. 

 si, Spermatheca. 

 adsL Accessory tube to spermatheca. 



x. Elesliy body at opening of oviduct in Arion. ctter, 



References to Figs. 5 and 6 onli/. 



a. Backward turn of the intestine in L. maximus. 

 y. Its constriction. 



«'. Caecum occupying a similar position in L.flavus. 



b. Intestine cut through near the liver. 



e. Rectum. 



dd. Great retractor muscles. 

 f Curl of intestine round the muscles. 



