PLATE VI. 



Eucalanus attenuatus, Dana. 



Fig. 1. Female, seen from right side, magnified 32 diameters. 



Fig. 2. Head of the same seen from below ; (r), rostrum. 



Fig. 3. Kostrum. 



Fig. 4. Posterior antenna. 



Fig. 5. Mandible and palp. 



Fig. 6. Anterior foot-jaw. 



Fig. 7. Posterior foot-jaw of male. 



Fig. 8. One of the swimming feet. 



