92 Proceedings of the Royal Society of Victoria. 



It remains to be seen whether the internal anatomy will 

 reveal any corresponding relationship amongst the various 

 forms. 



DESCRIPTION OF PLATES. 

 Plate XI. 



Fig. 1. — Geoplana deyiclyi. Large specimen x 1^. 



Fig. 1a. — 0. dendyi. Transverse section of body. 



Fig. 2. — G. dendyi. Enlarged view of anterior end. 



Fig. 3. — G. dendyi. Enlarged view of surface of the body, 

 to show the spotted nature of the skin. 



Fig. 4. — G. dendyi. Enlarged view of the anterior end, 

 dorsal view. 



Fig. 5. — G. dendyi. Ventral surface x 1|. 



Fig. 6. — Geoplana frosti. Brown-coloured variety, at rest 

 X li. 



Fig. 6a. — G. frosti. Transverse section across the body. 



Fig. 7. — G. frosti. Greenish variety, moving X Ih. 



Fig. 8. — G. frosti. Dark variety, in which the dorsal light 

 bands are feebly indicated. The specimen in 

 this respect approaches G. tvalhallce x 2. 



Fig. 9.—G. frosti. Ventral surface x ]|. 



Plate. XII. 



Fig. 10. — Geoplana munda. Dorsal view x 3. 



Fig. 10a. — G. munda. Transverse section across the body. 



Fig. 11. — Geoplana walhallw. Dorsal surface of animal at 

 rest X \h. 



Fig. 11a. — G. walhallw. Transverse section across body. 



Fig. 12. — G.wcdhallce. Animal in motion x 1|. 



Fig. 13. — G. walhallce. Ventral surface X 1|. 



Fig. 14. — Geoplana sulphureus. Dorsal surface, life size. 



