Collection of Slugs from South Africa. 5 



The alimentary canal is very similar to that of A. burnupi, 

 excepting that the two salivary glands and ducts are perfectly 

 distinct. The pedal gland (plate J I., fig. 14) is much longer but 

 not quite so large in circumference as in A. hurnupi, it is densely 

 folded and twisted upon itself, and laterally wraps around the viscera. 

 Eespecting the generative organs (plate II., fig. 15), there is a small 

 vestibule into which the vagina and peuis open, this latter organ is 

 much longer than in A. burmqji, otherwise it shows the same simple 

 characters. The free-oviduct is wider and the common duct not so 

 great in length. The most striking difi'erence perhaps is in the 

 form of the receptaculum seminis (plate II., fig. 15, r.s.). In this 

 species it is partly covered by the coil of the common duct, for 

 unlike the condition which obtains in A. hurnupi, it is directed 

 backwards and is perfectly straight. The hermaphrodite duct was 

 so brittle that it broke away in dissection. 



Fabiily ARIONIDiE, Gray. 

 Gen. OOPELTA, Morch. 



OOPELTA NIGBOPUNCTATA, Morch., 



Plate I., figs. 7-8; Plate II., fig. 16. 

 Anwial yellowish-green, lighter laterally. Body marked by a 

 series of oblique, backwardly directed furrows 2-2*5 mm. apart. 

 Mantle oval, granulated, spotted with a series of black dots towards 

 the medium line, sometimes very few. Slight trace of keel. Eugae 

 small. Peripodial groove distinct. Foot-fringe and foot-sole almost 

 yellow, no lineoles or divisions into median and lateral planes. 

 Length (in alcohol), 50 mm. ; mantle, 21 mm. 

 Hah. Cape Town. E. M. Lightfoot. 



I think I am correct in stating that neither the animal or generative 

 organs of this slug have previously been figured. I therefore take 

 this opportunity of giving figures of the same. 



Generative Organs. Both vestibule and vagina are small. The 

 sperm duct is a large, exceedingly thick- walled organ. At its distal 

 end it becomes much smaller, and forms a small rounded head with a 

 smaller dilatation into which the vas deferens opens, and on its dorsal 

 side has a short retractor muscle inserted (plate II., fig. 16-, sp. d.). 

 The vas deferens commences as a very tine tube and lies close to the 



