ABT. 18 NEW COMMERCIAL COPEPODS SEIWELL 6 



Total length, 0.94 millimeter. Length of anterior body, 0.60 

 millimeter. Greatest width (cephalon), 0.35 millimeter. Length 

 of posterior body, 0.34 millimeter. Width (genital segment), 0.15 

 millimeter. 



EXPLANATION OF PLATES 



Plate 1 

 Amphiascus commensalis, new species 



Fig 1. Female, fourth leg. 



2. Male, holotype, fourth leg. 



3. Same, first leg. 



4. Same, second leg. 

 6. Same, fifth leg. 



6. Female, holotype. 



7. Same, second leg. 



8. Same, fifth leg. 



9. Male, holotype, first antenna. 



10. Female, mandible. 



11. Same, rostrum. 



12. Male, holotype, second leg. 



13. Female, holotype, second antenna. 



14. Same, first antenna. 



Plate 2 



Tisbe wilsoni, new species 

 FiQ. 1. Female. 



2. Mandible. 



3. Female, second leg. 



4. Male, holotype. 

 6. Same, fourth leg. 



6. Same, second antenna. 



7. Same, first maxiUa. 



8. Male, holotype, first antenna. 



9. Same, second maxiUa. 



10. Female, fifth leg. 



11. Male, holotype, first leg. 



12. Same, first maxilliped. 



13. Male, holotype, fifth leg. 



O ^ /i 



