48 Art 4.— T. Kaburaki ; 



Key to Species of the Terrestrial Planarians embodied in this Paper. 



1. Eyes numerous. 



A. Without Lead-lappets 

 a\ Dark in colour. 



a^. Dorsal surface of a dark olive-like brown colour, marked with a dark 

 median stripe. Two pairs of colourless spots at the lateral sides near 



the anterior tip of body Geoplana hvnaculata. p. 2. 



b^. Body pale gray in colour, marked with a dark brown median stripe . 



Geojjlana lajndicola p. 3. 



h\ Light yellow in ground colour. 



Body marked with a dark median stripe . . . Artioposthia jajwnica. p. 3. 



B. With head-lappets. 



a}. Without longitudinal stripe. 

 a^. Head small lunar in shape. 



Body of a bright orange colour Perocephahis fulvus. t^. 7. 



b^. Head broad semi-lunar in shape, 

 a^. Ground colour brownish. 



a*. Dorsal surface uniformly of a dark brownish colour 



Bipalium venosiim. p. 8. 



6*. Dorsal surface dark reddish brown in colour 



Bipalium niteofiilvum. p. 12. 



b^. Ground colour dark. 



c*. Dorsal surface uniformly velvety black 



Placocephalus fuscatiis. p. 34. 



rf*. Body of a deep green colour Placocep]ialus fjlaucus. p. 38, 



è^. With longitudinal stripe. 



f-. Longitudinal stripe unpaired, 

 c^. With one stripe. 



f*. Head without pattern. 



a^. Ground colour yellow or brown. 



a!'. Body of a dirty yellowish colour . Bipalium ochroleiicum. p. 13. 

 b^. Colour brownish orange mixed with a slight dark tone . , . 



Bipalium monolineatum. p. 27. 



c". Body of a uniform umber brown colour 



Bip)alium liilgeïidorfi. p. 22. 



Ifi. Ground colour dark. 



d^. Colour black mixed with a slight olive tint 



Bipalium fuscolineatum. p. 19. 



e^. Colour dark with a touch of olive-like brown 



Bipalium Jdsoensis. p. 16. 



