NO. 1580. A^^ W SPECIES OF CA LIGIN. E— WILSON. 627 



EXPLANATION OF THE PLATES. 



Plate XLIX. Caligus hseinulonis Kroyer. 



Fig. 1, dorsal view of female; fig. 2, dorsal view of male; fig. 3, second antenna and 

 first maxilla of female; fig. 4, same of male; fig. 5, mouth and second maxilla; fig. 6, 

 furca; fig. 7, second maxillipeds of female; fig. 8, same of male; figs. 9 to 12, first, sec- 

 ond, third, and fourth swimming legs; fig. 13, genital segment of female, ventral view; 

 fig. 14, genital segment of male, ventral view. 



Plate L. Caligus ntfus, new species. 



Fig. 15, dorsal view of female; fig. IC, second antenna and first maxilla; above and 

 to the left is an enlarged drawing of the maxilla; fig. 17, mouth and second maxillae; 

 fig. 18, first maxilliped; fig. 19, second maxilliped; figs. 20 to 23, first, second, third, 

 and fourth swimming legs; fig. 24, genital segment of female, ventral view; fig. 25, 

 carapace of female, enlarged, showing ovaries and musculature: fig. 26, dorsal view of 

 chalimus; fig. 27, second antenna of same; fig. 28, second maxilliped; figs. 29 to 31, 

 first, second, third, and fourth swimming legs. 



Plate LI. Lepeophtheirus monacanthus Heller. 



Fig. 32, dorsal view of female; fig. 33, dorsal view of very young female; fig. 34, sec- ■ 

 ond antenna; fig. 35, second maxilla; fig. 36, furca; fig. 37, second maxilliped; figs. 38 

 to 41, first, second, third, and fourth swimming legs; fig. 42, genital segment of female' 

 ventral view; fig. 43, newly hatched nauplius. 



Plate LI I. Lepeophtheirus longispinosus , new species. 



Fig. 44, dorsal view of female; fig. 45, second antenna and first maxilla; fig. 46, 

 mouth tube; fig. 47, second maxilla; fig. 48, furca; fig. 49, first maxilliped; fig. 50, 

 second maxilliped; figs. 51 to 54, first, second, third, and fourth swimming legs; fig. 

 55, genital segment of female, ventral view. 



Plate LIII. Parapetalus occidentalis, new species. 



Fig. 56, dorsal view of female; fig. 57. second antenna and first maxilla; fig. 58, 

 mouth tube; fig. 59, second maxilla; fig. 60, furca; fig. 61, second maxilliped; figs. 62 

 to 65, first, second, third, and fourth swimming legs; fig. 66, genital segment of female, 

 ventral view; fig. 67, posterior lobes of genital segment, enlarged, showing semen 

 receptacle, ducts, and spermatophores; fig. 68, A'entral view of genital segment and 

 abdomen of very young female. 



Plate LIV. Abasia pseudorostris, new genus and species. 



Fig. 70, dorsal view of female; fig. 71, dorsal view of male; fig. 72, rostrum, first 

 and second antennae of female; fig. 73, same of male; fig. 74, mouth tube, second 

 maxilla?, and first maxilliped, showing relative position of latter; fig. 75, second max- 

 illiped; figs. 76 to 79, first, second, third, and fourth swimming legs; fig. 80, genital 

 segment of female, ventral view. 



Plate LV. Tnxophonts caUgodes, new genus and species. 



Fig. 81, dorsal view of female; fig. 82, second antenna and first maxilla; fig. 83, 

 mouth tube and second maxillae; fig. 84, piandible; fig. 85, first maxilliped; fig. 86, 

 furca; figs. 87 to 90, fhst, second, third, and fourth swimming legs; fig. 91, dorsal 

 view of genital segment and abdomen of very young female; fig. 92, ventral view of 

 genital segment of adult female. 



Plate LVI. Tuxophorus caligodes, continued. 



Fig. 93, dorsal view of male; fig. 94, second antenna and first maxilla; fig. 95, second 

 maxilliped; fig. 96, ventral view of genital segment, enlarged; fig. 97, dorsal view 

 of chalimus; figs. 98 and 99, first and second swimming legs of same; fig. 100, newly 

 hatched nauplius of Abasia pseudorostris. 



