108 AUSTRALIAN LAND PLANAKIANS, 



Like G. variegata this is an exceedingly sticky planarian, the 

 slime with which the body is coated being extremely tenacious 

 and plentiful. Both these species are vei-y sluggish during the 

 summer months — the only period when I have collected them — 

 and appear to be aestivating, although other species are feeding 

 freely. 



Geoplana robust a, n.sp. 



(PI. VL fig. 4.) 



Ground colour of dorsal surface lemon-yellow. A pair of very 

 bold sharply defined bands 1 mm. wide enclose a median space of 

 ground colour also 1 mm. in width. The Viands vary in colour 

 from black to rich brown, their margins very dark, getting lighter 

 towards the centre through the ground colour showing through 

 faintly, and giving them a somewhat speckled appearance. 

 Towards the ends the bands taper symmetrically to fine points 

 which join near the tips. Along the margins of the dorsal surface 

 there is a faint line of specklings of same colour as the main 

 stripes. The anterior tip is rich brown. Ventral surface a 

 somewhat paler shade of the same colour as the dorsal, without 

 any markings. Length of average specimens in spirit 40 to 50 mm. 

 by 4 mm. in diameter. In a spirit specimen 48 mm. long the 

 pharyngeal opening is 28 mm. from anterior tip, and the genital 

 11 mm. further back. Another one 42 mm. has the former dis- 

 tance 27 mm. and the latter 7 mm. 



Eyes large and readily seen, arranged as usual in single row 

 round the anterior tip, and grouped, though somewhat sparingly, 

 at the sides, continuing in a drawn out line for some way down 

 the sides. 



Type in Australian Museum; register number G. 1512. 



Zr«6.— Bundanoon, N.S.W. 



In shape this species resembles G. Fletcheri, Dendy, from which 

 it is distinguished by the sharp definition of the stripes, togetlier 

 with the entire absence of any indication of a dorso-median line 

 or of scattered specklings on dorsal surface. 



