DESCRIPTION' OF PLATE XXVI. 



All tlie figures refer to Phreatoicus australis. 



Fig. 1. First pleopod, x 19. 



2. Second pleopod of male showing the " penial filament, " x 19- 



3. Third pleopod, x 19. 



4. Fourth pleopod showing the parasitic (?) growths at a, x 19. 



5. One of the latter, x 180. 



6. External organ of male, x 45. 



[ReprodiKied by G. H. Barrow of the Australian Museum, f roui original 

 drawings by the author, Chas. Chilton, and printed by Ileliotype.] 



