186 Proceedings of the Royal Society of Victoria. 



Geoplana fletcheri^ var. ndelaidefisis, Dendy, Proc. A.A.A.S., 

 Hobart, 1892, p. 373. 



I am again indebted to Mr. Thos. Steel for no less than thirty- 

 nine living specimens of this species, collected by him behind 

 Mount Lofty on 3rd May, 1892. These specimens are exti^emely 

 interesting, as exhibiting an unusual degree of variation in 

 markings, as shown in the figures A to E (plate X.), and thereby 

 connecting the typical G. fletcheri by almost insensible degrees 

 with tlie, at first sight, very distinct variety which I have 

 previously termed adelnide?isis, and which I at first took to lie a 

 distinct species. 



To judge from the large number of specimens met with in a 

 very restricted area the species would appear to have its home in 

 the Mount Lofty district, while in Victoria it is decidedly rare. 

 It is interesting to note that no other species were found in 

 association with it. The large number of specimens obtained by 

 Mr. Steel is partly to be accounted for by the fact that the locality 

 is a depU for firewood brought from the immediately suri'ounding 

 forest. 



The general form of the specimens, including the strongly 

 concave ventral surface, the markedly posterior position of the 

 external apertures and the toughness of the skin, agree with the 

 corresponding characters in the typical forms of G. fletcheri 

 already described. 



In all the specimens the ventral surface is of a pale yellow 

 colour, without markings. The eyes are arranged in a not very 

 densely crowded patch at each side of the head, in close-set single 

 series round the horseshoe-shaped anterior extremity, and more 

 or less sparingly all down the sides of the body to the hinder end. 



Sometimes when at rest the body is supported on the edges of 

 the ventral surface, leaving a hollow tunnel beneath the middle ; 

 this may be very conspicuous when the animal is resting on' a 

 sheet of glass and is viewed from beneath. 



The variations in pattern, although very cons23icuous, are all 

 clearly due to the intensification or suppression of parts of what 

 may be regarded as the typical pattern of the species ; and, so far 

 as I know, this statement holds good of all Land Planarians. 



The ground colour of the dorsal surface varies from rich canary- 

 yellow to very pale yellow. The markings (of various shades of 



