626 TASMANIAN LAND PLANARIANS, 



out so as to cover the whole dorsal surface except a narrow strip 

 of dirty yellow on either side of the median line, the submarginal 

 stripes being also strongly defined. Between these two extremes 

 there are many gradations. 



A medium specimen in spirit is 30 mm. in length, with the 

 peripharyngeal opening 19 and the genital aperture 24 mm. from 

 anterior tip. A small example 20 mm. in length has the relative 

 positions of the apertures 11 and 14^ mm. respectively. 



On two occasions examples of this species sent me by Mr. 

 Dove from Trevallyn Hills deposited egg-capsules. The first was 

 laid about June 2, 1899, and failed to hatch. The other deposited 

 in July of same year hatched out in my vivarium about 4th 

 September, some seven weeks after being laid. In both cases 

 the capsules were between 2 and 3 mm. in diameter. From the 

 one which hatched there emerged four young, three of which were 

 about 13 mm. in length when fully extended, the fourth being 

 only about half that size. The ground colour of dorsal surface 

 was milk-white, sprinkled all over with brown speckles, tending 

 to arrange themselves in an irregular median band. 



Ventral surface also milk-white, with no markings. Eyes in a 

 single row round the entire margin, with no side grouping. 



Two of the little ones fed on flies which I disabled and gave to 

 them, and remained alive for between 2 or 3 weeks, but eventually 

 died. During this time the pigmentation of the dorsal surface 

 became much darker. 



One of the specimens of G. Tasmaniana, from Trevallyn Hills, 

 after preservation in spirit has two pharyngeal tubes extruded, 

 each of which is about one-half of the usual size (PI. xli., fig. 4). 

 Amongst the many hundreds of land planarians which I have 

 preserved I have never observed a similar case. 



Geoplana Tasmamiana (Darwin), var. flavicincta, var.n. 

 (Plate xli., fig. 5.) 

 This handsome variety agrees in every respect with the type 

 except that around the margin of the dorsal surface there is a 

 border of light yellow, giving the animal a very striking appear- 

 ance, as if it were set in a yellow frame. 



