30 ADDITIONAL OBSERVATIONS ON 



situation, viz., in the earth around the roots of a chrysanthemum vphich 

 was given to me by Mr. G. W; Officer and which was taken out of the ground in 

 Toorak, near Melbourne, in June, 1890. This specimen when ahve was of a very 

 dark Prussian bhie colour on the dorsal surface and paler blue on the ventral. 

 There was a narrow median dorsal stripe of yellow, and an indistinct median 

 ventral very pale blue stripe traceable back nearly to the genital aperture. There 

 was no different colour at the anterior extremity. In spirit the specimen measures 

 about 35 by 2'5 mm.; the peripharyngeal aperture is very slightly behind the 

 middle of the body and the genital aperture at rather more than one-third of the 

 distance from the peripharyngeal opening to the hinder end of the body. The eyes 

 are easily visible with a lens. This specimen, although now preserved in spirit for a 

 year, has preserved its blue colour remarkably well. It is impossible, of course, 

 to determine how it was introduced into Mr. Officer's garden at Toorak, and 

 it is interesting to note in this connection a remark made by Messrs. Fletcher 

 and Hamilton* concerning the same species to the effect tliat the specimens usually 

 found by them have an orange-red tip (as appears to have also been the case in the 

 Croajingolong specimens) but that " on three different occasions we have found on 

 the pavement in Hyde Park alongside the enclosure at Captain Cook's statue a 

 number of blue Planarians (about fourteen altogether), which are without the red tip, 

 and in which the median stripe varies from a dirty white to a distinct yellow, 



changing to white in spirit The enclosure referred to has probably been 



stocked with these Planariaus from the Botanic Gardens, but we do not know from 

 what locality. The differences in living specimens in the two cases seem to be 

 constant, and are sufficiently marked to make one a variety of tlie other, if not to 

 separate them as distinct species." They consider that the red-tipped variety is 

 probably the typical form, although Moseley does not mention the red colour of 

 the anterior extremity. It is curious that the " introduced " Toorak specimen, if 

 I may use the term, should exhibit exactly the same peculiarity as the " introduced" 

 Sydney specimens, and this is an argument for supposing them to belong to a 

 distinctly marked variety whose natural habitat is not known, but which is 

 characterised by the absence of any red colour at the anterior extremity. | 



5. Geoplana dciidyi, Spencer.;]: 



This species is evidently very closely related to Geoplana earn lea, being 

 distinguished from it perhaps only by the presence of the median dorsal line of blue 



* Loc. cit. 



f On the evening on whioli this paper was read another specimen of this variety was found on the floor in the house 

 at Toorak from the garden of which the tirst specimen was obtained almost exactly twelve months ago. Mr. Officer kindly 

 brought this second specimen to me alive, so that owing to this remarkable coincidence I am able to give a figure of 

 the worm in its living condition. The second specimen agrees so closely with the first that no special description 19 

 necessary. 



{ Loc. cit. 



