372 NOTES ON AUSTRALIAN LAND-PLANARIANS, 



UndersiTrface much lighter in cclour and showing two whitish 

 lines, one on either side of the oral and genital orifices. Length 

 crawling 33 mm. 



Hab.—Mt. Wilson. 



We are glad to associate this pretty little species with the name 

 of our friend, Mr. J. D. Cox, who found the only specimen yet 

 seen, and to whom w e owe the opportunities we have had of visiting 

 Mt. Wilson, and whose enthusiastic help in looking for Planarians 

 we gratefully acknowledge. The specimen lived only for a few 

 days and died unexpectedly before its examination was complete, 

 the anterior extremity breaking off, so that we do not yet know 

 the characters of its eyes. Tt may therefore be a species of 

 Geoj)lcma, but as we cannot see any eyes in the portion of it now 

 in spirit, it is provisionally placed here, until we can obtain fresh 

 examples. 



15. Rhynchodemus obscurus, n. sp. 



Undersurface almost white. Dorsal surface shining, dark ashy- 

 grey shading to black, darkest in small specimens, lighter in very 

 large specimens in which the colour is slightly darker in the 

 anterior portion of the body ; with a more or less distinct median 

 darker longitudinal line ; the lateral mai'gins of the body much 

 lighter, gradually shading into the white of the undersurface. 

 In spirit the colour changes to dull drab. When quiescent the 

 body is relatively broad and flattened ; when fully extended it is 

 quite slender, and then the posterior extremity is more pointed 

 than the anterior one. No ambulacral line, the animal using the 

 whole undersurface as a sole. 



Length of two of the largest specimens alive and extended 

 8 cm. and 5 "4 cm. respectively, 3 and 2 mm. broad ; the former in 

 spirit 39 mm. long, 3 mm. broad ; a smaller specimen alive and 

 crawling 3 "8 cm. long, 2 mm. broad ; in spirit 18 mm. long, 

 3 mm. broad, the mouth 11 mm. behind the anterior extremity, 

 and the generative aperture 4 mm. posterior to the mouth. 



Hah. — Ryde ; near Springwood ; near Guntawang, N.S.W. 



