ON THE VICTORIAN LAND PLANARIANS. 77 



Opening into the peripharyngeal chamber somewhat in front of the middle of the 

 ventral surface. Genital opening at about the junction of the middle and posterior 

 thirds of the body. The ground colour of the dorsal surface is bright canary yellow. 

 The stripes vary considerably in the extent to which they are developed. The most 

 typical condition appears to be that represented in Pigs. 1 and 2. Here there is a 

 single, narrow, very dark brown or almost black, median dorsal stripe. At the 

 anterior end the brownish-pink tip is continued into two short, dusky brown stripes 

 on each side of the middle line ; the one nearest the middle line being the longest. 

 At the posterior end also an iU-defined dusky stripe seems to be always present on 

 each side of the middle line. Specimens with stripes answering to the above 

 description are very abundant at Macedon. In a shght variety from Warburton and 

 Walhalla, of which I obtained six or seven specimens, the stripes are less developed, 

 even the median one being present only at the anterior end of the body, though 

 longer than the others. In a third variety, on the other hand, from Macedon, there 

 are three continuous stripes (Figs. 3, Sa), the innermost of the two lateral stripes on 

 each side extending all the way down the body and becoming continuous at the 

 posterior end with the rudimentary lateral stripes mentioned as existing there in the 

 typical form. The ventral surface is pale, nearly white. When crawling, examples 

 of this species are about 90 mm. in length and hardly 3 mm. in greatest breadth. 



Localities. — Macedon, Warburton, Walhalla (Victoria). 



12. Geoplana qnadrangulata, n. sp. (Figs. 6, 6fl). 



Body almost quadrangular in section but rounded off at the angles. Dorsal 

 surface a good deal broader than the ventral and connected therewith by inwardly 

 sloping lateral surfaces. Both the dorsal and ventral surfaces are flattened. The 

 opening into the peripharyngeal chamber is situate a little behind the middle of 

 the ventral surface, and the genital opening is about half way between it and the 

 posterior end. The dorsal surface is of a dark reddish brown colour, slightly mottled, 

 with a narrow median stripe of very dark brown, and a dark brown anterior tip. At 

 the junction of the dorsal with the lateral surfaces there is, in two out of three of my 

 specimens, a single row of small, pale spots, very distinct in spirit specimens. The 

 lateral surfaces are also reddish brown, but much paler than the dorsal surface. The 

 ventral surface is white, but owing to the slope of the sides of the body the latter 

 appear as a brown stripe on each side of a median white band (Fig. 6rt). Length 

 when crawling about 27 mm., greatest breadth about 1.5 mm. 



Locality . — Macedon (Victoria) . 



