PLATE XXVIII. 



Hemicalanus spinifrons, G. O. Sars. 



Fig. 1. Adult female, dorsal view (left anterior antenna not 

 fully drawn). 



2. Spiniform frontal process. 



3. Posterior antenna. 



3 (bis). Mandible with palp. 



4. Body of left mandible, viewed from inner face. 



5. Masticatory part of right mandible. 



6. Maxilla. 



7. Anterior maxilliped. 



8. Posterior maxilliped. 



9. Leg of 1st pair. 



10. Leg of 2nd pair. 



11. Last pair of legs. 



12 (not numbered in the plate). Tail, dorsal view. 



