Art. XTY. — Notes on some new or littk-kno^vn Land 

 Planariaiis from Tasmania and SoutJi Australia. 



(With Plate X.) 



By Arthur Dendy, D.Sc. 



[Eead 16th November, 1S93.] 



I. — Tasmaxian Laxd Planarians. 



GeopJana tasinaniaua, Darwin, sp. 



Planaria tas/nnniana, Darwin, Annals and Magazine of 

 Natural History, vol. xiv\ (1844), p. 246. 



I have recived a large number of specimens from various parts 

 of Tasmania which I believe to be referable to Darwin's species. 

 The following description is taken from a living specimen collected 

 by Mr. L. J. Balfour on Mount Wellington, in March, 1892 :— 

 Body in life a good deal flattened, especially on the ventral 

 surface, but with no well-marked lateral surfaces, the sides being 

 rounded ; tapering very gradually in front, somewhat less so 

 behind. When crawling, about 43 mm. long and 2-5 mm. broad. 

 Ground colour of dorsal surface pale brownish-yellow, with five 

 stripes of umber-brown. The median stripe narrow, dark and 

 well-defined. The inner paired stripe broad and dark, but rather 

 ill-defined, separated by an interval of ground colour about as 

 broad as itself from the median stripe. The outer paired stripe 

 at the extreme margin of the dorsal surface, narrow, rather faint 

 and ill-defined, separated from the inner paired stripe by a band 

 of ground colour about equal to the latter in width. Ventral 

 surface white, with no markings. Anterior tip dark-brown. 

 Eyes arranged as usual and continued all round the horse-shoe- 

 shaped anterior extremity ; also continued down the sides of the 

 body, sparsely, to the posterior end. After preservation in sj)irit 

 the dorsal surface became more flattened, and its margins turned 

 in to form more or less distinct but narrow lateral surfaces, 

 carrying the ill-defined outer paired stripes. The peripharyngeal 

 aperture (in spirit) is soiriewhat behind the middle and the 

 genital aperture nearer to it than to the posterior end. 



