32 ADDITIONAL OBSERVATIONS ON 



8. Geoplana sngdeni, Dendy. 



I have received specimens of this species from Creswick, collected hy Mr. Fiddian, 

 and have also obtained more specimens from Macedon, M^hence it was originally 

 recorded. At Macedon I have again observed it crawling about in l)road daylight. 

 Professor Spencer informs me that he has found this species at Warragul. 



9. Geoplana mcdiolincata, Dendy. 



I identify with this species specimens obtained from Fern Tree Gully, Croydon 

 and Creswick, and Professor Spencer has figured* a variety of the species from the 

 country lying between Marysville and the source of the Yarra along the Wood's Point 

 Road. As Professor Spencer has pointed out, specimens in which the lateral stripes 

 are well developed make an approach to Geoplana qinnquelineata ; on the other 

 hand, the species seems also to merge into G. sngdeni. Hence although typical 

 specimens of G. sngdeni and G. quinquelineata appear very different indeed it seems 

 not impossible that they may have to be united with G. mediolineata as varieties of 

 one species. G. mediolineata occupies an intermediate position between the other 

 two, not only as regards the stripes but also in the shape of the body, being not 

 usually so flattened as G. quinquelineata and less cylindrical than G. sngdeni. 



In G. mediolineata the median stripe is always much darker in colour than the 

 others (if they be present). In this it agrees with G. quinquelineata and differs from 

 G. m^niahoni. 



10. Geoplana quinquelineata, Fletcher and Hamilton. 



This species seems to be characteristic of the Sandhurst district and in addition 

 to the localities mentioned in my previous memoir I have now to record it from 

 Ballarat, Creswick and Heidelberg. In some of the Creswick and Ballarat specimens 

 the lateral stripes show a strong tendency to disappear and it is dittlcult to say 

 whether the specimens should be called quinquelineata or mediolineata. The genital 

 aperture is very diflficult to observe but appears to me to be rather nearer to the 

 peripharyngeal aperture than to the hinder end of the body, while the peripharyngeal 

 aperture is more easily visible and situate about the middle of the ventral surface. 

 Hence G. sngdeni, G. mcdiolincata and G. qninquelineata agree pretty closely in the 

 position of the apertures. 



* hoc. cit. 



