Plate XII. 



Figs. 



1. Lepeophtheirus nordmanni (M. Edwards), (p. 66.) 



1. Dorsal view, ? , x 9. 



2,3. Lepeophtheirus pectoralis (0. F. Miiller). (p. 64.) 



2. Newly hatched nauplius, x 52. 



3. " Chalimus " stage, x 26. 



4,5. Demoleus paradoxus (Otto), (p. 79.) 



4. Ventral view, ? . (After Otto.) 



5. Ventral view, $ . (After Otto.) 



(Figures 4 and 5 enlarged.) 



