A Furtlwr Collection of South African Slugs. 233 



with a short, finger-Hke process, while the former makes a bend 

 ventrally and terminates in a sac-hke extremity. To the side of this 

 the large retractor muscle is inserted, and just above the point of 

 insertion of the muscle the vas deferens is given off (plate XIV., figs. 

 8, 9). Internally (plate XIV., fig. 10) the posterior division contains 

 a large, pointed, muscular organ attached to a broad, muscular base, 

 quite unlike anything I have hitherto seen in any species of this 

 genus. The anterior division is partially divided by a prominent 

 muscular ridge (plate XIV., fig. 10, m.r.), beyond which the wall has 

 a plicated appearance, due to a series of thick, muscular ridges with 

 intervening thin portions. The retractor muscle is very long, 

 measuring 9 mm. The vagina is a long, tubular cavity, considerably 

 longer than in 0. nigrojmnctata ; on the left side of this the recepta- 

 culum seminis opens, while beyond is a very short free-oviduct 

 (plate XIV., fig. 7, fov.). Apart from the great length of the duct 

 of the hermaphrodite gland, the remaining organs call for no special 

 mention. 



A dissection of the sperm-duct of 0. nigropunctata (plate XIV., 

 fig. 12) shows that there is nothing corresponding to the posterior 

 division of 0. ijohjimnctata. There is a thick, muscular ridge, larger 

 than in 0. polyjmnctata, with a smaller one anterior to it (plate XIV 

 fig. 12). 



