88 Proceedings of tlie Royal Society of Victoria. 



Geoplana adce, var. extiulineata, iiov. 



I propose this name for two small specimens of G. o.doi 

 with chestnut brown stripes but differing from the typical 

 form in the possession of an additional fine brown strips on 

 each side, a little outside the broad one. The peripharyngeal 

 aperture (in spirit) is situate at about the middle of the 

 ventral surface, and the genital aperture about half way 

 between it and the posterior end. 



Both specimens w^ere collected by Professor Spencer and 

 Mr. C. French near Narrewarren, South Gippsland, Victoria, 

 July 1891. 



Rhyncliodemus slmulans, n. sp. 



Body oval in section, a good deal flattened when at rest, 

 more cylindrical when crawling ; tapering gradually in front 

 to the horse-shoe shaped anterior extremity, and more 

 abruptly behind. Eyes two, as usual in the genus, one on 

 either side, a little way behind tlie anterior extremity. 

 Length, when crawling, about 22 mm. ; greatest breadth, To 

 mm. Peripharyngeal apertuie (in spirit) well behind the 

 middle of the ventral suiface, but not (luite as far back as 

 the junction of the middle and [)ostei-ior thirds of the body. 

 Genital aperture slightly nearer to tlie posterior extremity 

 than to the peripharyngeal aperture. 



Dorsal surface dark grey, darker in the middle line ; 

 spotted or mottled all over (in the middle line as elsewhere) 

 with small specks of white, giving it a beautiful and 

 characteristic marbled appearance under a low power of the 

 microscope. 



Ventral surface marbled like the dorsal, but with the white 

 predominating instead of the grey. Anterior extremity 

 greyish. 



A good many specimens of this beautiful little species 

 were obtained by Mr. C. C. Brittlebank at Myiniong, near 

 Bacchus Marsh, Victoria, in July and August 18!)]. It is an 

 extremely small species and, owing to the quantity of black 

 pigment present, I had considerable trouble in determining 

 the number of the eyes, so that at one time I considered it 

 as belonging to the genus Geoplana. Serial sections, cut by 

 the parafiin method, however, at once decided the question 

 in favour of RhyucliodeiiiiiH. 



