26 ADDITIONAL OBSERVATIONS ON 



anatomically, and when the results of this anatomical investigation are combined with 

 the observations of Australian zoologists upon the living animals we may hope to 

 arrive at a fair idea of the relationship of the various forms. 



In the systematic part of this paper the species are arranged in what appears to 

 me to be the most natural order, commencing with the forms without stripes. 

 Fifteen of the species thus appear to fall into five groups, within each of which the 

 species are all closely related. The remaining seven species do not to my mind fall 

 into any of these groups and are also very distinct from each other. The following 

 is the complete list up to date, the related species being bracketed together in 

 groups : — 



I 1. Geoplaiia alba, Dendy. 



I 2. ,, sanguinea, Moseley. 



3. ,, spenceri, Dendy. 



4. ,, cant lea, Moseley. 



5. ,, dendy i, Spencer. 



6. ,, loalhallcE, Dendy. 



7. ,, frosti, Spencer. 



8. ,, sHgdem, Dendy. 



9. ,, iiiediolineata, Dendy. 



10. ,, qitinqiielincata, Fletcher and Hamilton. 



11. ,, iiimahoni, Dendy. 



12. ,, sulplmrea, Fletcher and Hamilton. 



13. „ hoggii, Dendy. 



14. ,, quadrangidata, Dendy. 

 16. ,, vcntropunctata, Dendy. 



16. ,, iitiinda, Fletcher and Hamilton. 



17. ,, ada, Dendy. 



18. ,, fletcheri, Dendy. 



19. ,, liicasi, Dendy. 



20. ,, howltti, Dendy. 



21. RhyiicJwdeinus victoria, Dendy. 



22. Bipaliinn kewensc, Moseley. 



With regard to the distribution of the species within the colony, I have been 

 able to collect a considerable amount of information ; and, for the benefit of 

 collectors, to whom it may be of service to know what localities have been explored 

 and what species found in each, I give the following table of distribution. I at 

 first thought of giving also a list of the months of the year in which each species 

 has been found, but this ap[)ears to me to be superfluous. Land Planarians may, 

 I believe, be found at all times of the year by diligent searching, but they seem to 



