BY THOS. STEEL. 



109 



Associated with the type I haxe noticed numbers of a most 

 beautiful form in which the ground colour of both surfaces is a 

 translucent pearly white, and the bands rich brown. 



This is the only planarian which I have obser\ed preying on 

 other 23lanarians. When collecting I found it necessary to put 

 specimens of this species in a box by themselves, as they attacked 

 and devoured such forms as G. sanguinea, G. Hillii, G. quhique- 

 lineata, ifec. I have seen this and other species feeding on earth 

 worms as well as insects. On removing a planarian from an 

 earth worm on which it was feeding, I observed a round hole or 

 puncture in the skin of the earthworm into which the planarian 

 had its oral oreran inserted. 



'o^ 



Geoplana albolineata, n.sp. 



(PL VII. fig. 8.) 



The median dorsal line is pure white, about l^ mm. in 

 diameter, and is bounded on either side by a dark line of about 

 twice its width. This line is grey-black on its inner side next 

 the white line, and intense black on its outer edge. As it 

 approaches the anterior tip it gradually assumes a rich chocolate- 

 brown colour, the intense margin disappearing, and the whole 

 merging into the tip which is brown. The margins of the dorsal 

 surface are light sulphur-yellow. Ventral surface sulphur-yellow 

 somewhat paler than that of the dorsal. 



The eyes are conspicuous, and are arranged as in G. Hillii 

 before described. In the specimens examined I did not detect 

 any side grouping of the eyes. 



The pharyngeal opening in spirit about midway between the 

 ends, and the genital aperture rather less than half-way between 

 this and the posterior ernd. A specimen alive at rest was 45 mm. 

 in length by l^ mm. broad, and when crawling lengthened to 

 60 mm. 



In section the body in life is very angular, forming almost a 

 triangle, with the ventral surface for the base. 



Type in Austi-alian Museum; register number G. 1513. 



