PLATE X. 



Figs. 1-4. Hemicalanus orientalis, n. sp. 



Fie. 1. Anterior antenna, magnified 50 diameters. 



Fig. 2. Anterior foot-jaw. 



Fig. 3. Posterior foot-jaw. 



Fig. 4. Abdomen and tail (imperfect). 



Figs. 5-16. sEtidius armatus, n. gen. and sp. 

 Fig. 5. Female, seen from right side magnified 50 diameters. 

 Fig. 6. Anterior antenna. 

 Fig. 7. Posterior antenna. 

 Fig. 8. Mandible. 

 Fig. 9. Anterior foot-jaw. 

 Fig. 10. Posterior foot-jaw. 

 Fig. 11. Foot of first pair. 

 Fig. 1 2. Foot of second pair. 

 Fig. 13. Inner branch and base of third foot. 

 Fig. 1 4. Inner branch of fourth foot. 

 Fig. 15. Fifth pair of feet of male. 

 Fig. 16. Abdomen and posterior thoracic spines of female. 



