PLATE IX. 



Scaphocalanus acrocephalus, G. 0. Sars, 

 (adult male). 



Fig. 1. A complete specimen, viewed from the dorsal face. 



2. Same, lateral view. 



3. Rostral prominence, with the tentacular filaments. 



4. Anterior antenna. 



5. Mandible with palp. 



6. Maxilla. 



7. Anterior maxilliped. 



8. Posterior maxilliped. 



9. Natatory leg of 2nd pair. 



10. Inner ramus of a natatory leg of 4th pair. 



11. Last pair of legs. 



