LAXB-l'LANARIANS FROM WEST AUSTUALIA. 701 



G. nlchollsi may approach pretty closely to the common 

 G. tasmaniana in general appearance, but may be distinguished 

 by the sharper dorso-lateral margins, the sides of the body being 

 rounded off (in spirit) in G. tasmaniana. 



Geoplana mortoni Dendy. 



Geoplana mortoni Dendy [1894]. 



Geojjlana mortoni von GraiF [1899]. 



Geoplana mortoni 8teel [1901 his\. 



We obtained a dozen good specimens of this beautiful and 

 well-characterized species in September 1914, in the neighbour- 

 hood of the Great Lake. It had been previously obtained by 

 the late Mr. Alexander Morton from an unknown locality in 

 Tasmania, and by Professor Baldwin Spencer from Parattah, and 

 my own acquaintance with it was limited to spirit-specimens. 



The following observations were made on a living specimen : — 

 " At rest very broad and much flattened, no median dorsal ridge. 

 " Dorsal surface dull yellow, closely and finely mottled with chest- 

 " nut-brown. Horseshoe-shaped anterior tip brown. Eyes as 

 " usual. Ventral surface white, much less closely mottled with 

 " small brown specks, with very narrow marginal band free from 

 " mottling. When crawling, dorsal surface very strongly arched." 



A good-sized specimen when crawling measured about 50 mm. in 

 length by -l-S mm. in greatest breadth, and one of my specimens 

 measures as much after preservation in spirit. 



The shape of the body in spirit-specimens is characteristic ; 

 convex above and concave below, especially in the anterior 

 portion ; broader behind than in front ; with prominent, narrow 

 margins at the junction of doi'sal and ventral surfaces. 



Geoplana xyphlops Dendy. 



Geoplana alba Dendy [1892]. 



Geoplana typhlops Dendy [1894]. 



Geoplana typhlops von Graff [1899]. 



This curious eyeless species appears to be one of the commonest 

 of the Tasmanian land-planarians. It has previously been re- 

 corded from Mount Wellington, Hobart and Parattah, and in 

 September 1914 we obtained it near the Great Lake and on Maria. 

 Island (one small specimen). Some of the specimens in spirit 

 develop a distinct narrow median ventral band, due to darkening 

 of the rest of the ventral surface. I have already noticed thi.s 

 feature in my previous descriptions. 



Geoplana flynni sp. n. 



I propose this species for four specimens collected by Dr. 

 Nicholls on Maria Island, and have much pleasure in naming it 

 after Professor Flynn of Hobart, who so successfully organized 

 the zoological excursions for members of the British Association 

 in Tasmania. 



Proc. Zuol. Soc— 1015. Xo. XLVIII. 48 



