742 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. xxv. 



Plate XVII. Argulus stizostethii, fign. 37-40, ventral and dorsal surfaces, antennae, and 

 posterior maxilliped of female; fig. 41, posterior legs of male. 

 XVIII. Argulus niger, figs. 42-45, ventral and dorsal surfaces, jiosterior max- 

 illiped and antennae of female. 

 XIX. Argulus maculosus, figs. 46, 48, and 49, ventral surface, antennae, and 

 posterior maxilliped of female; figs. 47 and 50, dorsal surface and 

 posterior legs and alxlomen of male. 

 XX. Argulus rrraicolor, figs. 51, 52, 53, and 55, ventral and dorsal surfaces, 

 posterior maxilliped and antennie of female; fig. 54, posterior legs 

 and abdomen of male. 

 XXI. Argulus (miericanus, figs. 56, 58, and 59, ventral surface, antennse, and 

 posterior maxilliped, of female; figs. 57 and (iO, dorsal surface and 

 posterior legs and abdouien of male. 

 XXII. Fig. 61, Argulus elongatus, female (after Heller); fig. 62, Argulus chro- 

 midis, female (after Kriiyer); fig. 63, Argulus natlereri, female (after 

 Kri'iyer) ; fig. 64. Argulus salmini, female (after Kroyer). 



XXIII. Fig. 65, Argulus purpurem, female (after Thorell); fig. 66, Argulus 



mellta, female (after Van Beneden); figs. (57 and 68, Argulus dactylop- 

 teri, male and female (after Thorell). 



XXIV. Fig. 69, Argulus foliaceus, male (original drawing); figs. 70 and 71, 



Argulus eoregoni, female and male (after Thorell); fig. 72, Dolops 

 Inngiccmda, posterior maxilliped of female (after Heller). 

 XXV. Fig. 73, Dolops longicauda, anterior maxilliped of female (after Hel- 

 ler) ; fig. 74, Dolups doradis, antennae of female (after Cornalia); fig. 

 75, Dolops doradis, dorsal surface of female (after Cornalia;; fig. 76, 

 Dolops longicauda, dorsal surface of male (after Heller); fig. 77, 

 Dolops kollari, dorsal surface of male (after Heller); fig. 78, Dolops 

 geagi, dorsal surface of male (after Bouvier). 

 XXVT. Mitrrophotographs of some North American Arguli. Fig. 79, Argulus 

 Ifitirauda, male; fig. 80, Argulus alosif, female; fig. 81, Argulus 

 megalops, male; fig. 82, Argulus maculosus, female; fig. 83, Argulus 

 versicolor, female; fig. 84, Argulus americanus, male; figs. 85 and 86, 

 ventraLand dorsal surfaces of Argulus americauns, female; figs. 79, 

 8], 83, and 84 are of living specimens; figs. 80, 82, 85, and 86 are of 

 preserved specimens. 

 XXVII. Fig. 87, Dolops reperta, dorsal surface of female (original); fig. 88, 

 Dolops hidentata, dorsal surface of male (original); fig. 89, Dolops 

 ranaru7?j., dorsal surface of female (original); fig. 90, abdomen of 

 male, same species (original); fig. 91, Argulus phoxini, dorsal surface 

 of male (after Leydig). 



