U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 94 PLATE 25 



Species of Argulus 



79-88, Argulus trilineatus Wilson: 79, Dorsal view of male; 80, abdomen showing caudal 

 rami; 81, first and second antennae; 82, ribs of sucking cups; 83, maxilliped of 

 female; 84, maxilliped of male; 85, tip of the same; 86-88, accessory sex modifica- 

 tions of second, third, and fourth legs. 



89-94, Argulus melanosticlus Wilson: 89, Dorsal view of female; 90, first and second antennae; 

 91, ribs of sucking cups; 92, respiratory areas; 93, maxilliped; 94, spots on dorsal 

 surface, showing relative size, the magnification one-half greater than in fig. 89. 



