﻿I 
  

  

  NO. 
  1950. 
  CRUSTACEAN 
  PARASITES 
  OF 
  FISH 
  AND 
  CRABS^WILSON. 
  273 
  

  

  Plate 
  23. 
  

  

  Mouth 
  parts 
  and 
  ewimming 
  legs 
  of 
  Artacolax 
  palleucus. 
  

  

  Figs. 
  42 
  and 
  43. 
  Third 
  and 
  fourth 
  swimming 
  legs 
  of 
  female. 
  Fig. 
  44. 
  Mouth 
  parts 
  

   of 
  female. 
  Fig. 
  45. 
  Mouth 
  parte 
  of 
  male. 
  (For 
  lettering, 
  see 
  fig. 
  15.) 
  

  

  Plate 
  24. 
  

  

  Female 
  of 
  Pseudoeucanihtis 
  uniseriatTxs. 
  

  

  Fig. 
  46. 
  Dorsal 
  view 
  of 
  female. 
  Fig. 
  47. 
  Second 
  antenna. 
  Fig. 
  48. 
  Mouth 
  parts. 
  

   Figs. 
  49 
  to 
  53. 
  First, 
  second, 
  third, 
  fourth, 
  and 
  fifth 
  ewimming 
  lege. 
  

  

  Plate 
  25. 
  

  

  Female 
  of 
  Txniacanthus 
  flagellans, 
  and 
  leg 
  of 
  Caligus 
  irritans. 
  

  

  Fig. 
  54. 
  Dorsal 
  view 
  of 
  female. 
  Fig. 
  55. 
  First 
  antenna. 
  Fig. 
  56. 
  Mouth 
  parts. 
  

   (For 
  lettering, 
  see 
  fig. 
  15.) 
  Figs. 
  57 
  to 
  60. 
  First, 
  second, 
  third, 
  and 
  fourth 
  ewim- 
  

   ming 
  legs. 
  Fig. 
  61. 
  Side 
  view 
  of 
  female, 
  showing 
  how 
  the 
  cephalon 
  projects 
  at 
  right 
  

   angles 
  to 
  the 
  rest 
  of 
  the 
  body. 
  Fig. 
  62. 
  Fourth 
  leg 
  of 
  Caligus 
  irritans. 
  

  

  Plate 
  26. 
  

  

  Female 
  of 
  Caligus 
  tenax. 
  

  

  Fig. 
  63. 
  Dorsal 
  view. 
  Fig. 
  64. 
  Second 
  antennae 
  and 
  maxillary 
  hooks. 
  Fig. 
  65. 
  

   Maxilliped. 
  Figs. 
  66 
  to 
  69. 
  First, 
  second, 
  third, 
  and 
  fourth 
  swimming 
  legs. 
  Fig. 
  

   70. 
  Second 
  antenna 
  and 
  maxillary 
  hook 
  of 
  male. 
  (For 
  lettering, 
  see 
  fig. 
  15.) 
  

  

  Plate 
  27. 
  

  

  Male 
  and 
  female 
  of 
  Caligus 
  irritans. 
  

  

  Fig. 
  71. 
  Dorsal 
  view 
  of 
  male. 
  Fig. 
  72. 
  Second 
  antenna, 
  maxillary 
  hook, 
  maxilla 
  

   maxilliped, 
  and 
  furca 
  of 
  male. 
  Fig. 
  73. 
  Dorsal 
  view 
  of 
  female. 
  Fig. 
  74. 
  Second 
  

   antenna, 
  maxillary 
  hook, 
  first 
  maxilla, 
  and 
  mouth 
  tube 
  of 
  female. 
  Fig. 
  75. 
  Maxilli- 
  

   ped. 
  Fig. 
  76. 
  Ftirca. 
  Figs. 
  77 
  to 
  79. 
  First, 
  second, 
  and 
  third 
  ewimming 
  legs. 
  

   Fig. 
  80. 
  Cement 
  glands, 
  ventral 
  view. 
  

  

  Plate 
  28. 
  

  

  Male 
  and 
  female 
  of 
  Caligus 
  robustus. 
  

  

  Fig. 
  81. 
  Dorsal 
  view 
  of 
  female. 
  Fig. 
  82. 
  Second 
  antenna, 
  maxillary 
  hook, 
  and 
  

   first 
  maxilla. 
  Fig. 
  83. 
  Furca. 
  Fig. 
  84. 
  Maxilliped. 
  Figs. 
  85 
  to 
  88. 
  First, 
  second, 
  

   third, 
  and 
  fourth 
  swimming 
  legs. 
  Fig. 
  89. 
  Dorsal 
  view 
  of 
  male. 
  Fig. 
  90. 
  Maxilliped. 
  

   Fig. 
  91. 
  Fourth 
  swimming 
  leg. 
  

  

  Plate 
  29. 
  

  

  Female 
  of 
  Caligus 
  atromaculatus, 
  and 
  male 
  and 
  female 
  of 
  Caligus 
  tenax. 
  

  

  Fig. 
  92. 
  Dorsal 
  view 
  of 
  female 
  of 
  C. 
  atrorrv 
  'us. 
  Fig. 
  93. 
  Second 
  antenna 
  and 
  

   first 
  maxilla. 
  Fig. 
  94. 
  Maxilliped. 
  Fig. 
  9t' 
  'ca. 
  Figs. 
  96 
  to 
  98. 
  First, 
  eecond, 
  

   and 
  fourth 
  swimming 
  legs. 
  Fig. 
  99. 
  Dorsai 
  view 
  of 
  male 
  of 
  C. 
  tenax. 
  Fig. 
  100. 
  

   Furca. 
  Fig. 
  101. 
  Cement 
  glands 
  of 
  female 
  C. 
  tenax. 
  

   69077°— 
  Proc.N.M.vol.44— 
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