COPEPOD PARASITES AND MUSSEL, GWCHIDIA ON FRESH-WATEK FISHES. 



Plate LXVI. 

 Females of Ergasilus lanceolatus , elongatus, and megaceros. 



373 



Fig. 40. Dorsal view of E. lanceolatus. 

 Fig. 41. Mouth parts. 

 Fig. 42. Second antenna. 



Fig. 43-46. First, second, third, and fourth 

 swimming legs. 



Fig. 47. Side view of E. elongatus. 



F^g. 48. Mouth parts. 



Fig. 49. Mouth parts of E. megaceros. 



Plate LXVII. 

 Female of Ergasilus nigrilus. 



Fig. 50. Dorsal view. 

 Fig. 51. Second antenna. 

 Fig. 52. Mouth parts. 



Fig. 53-56. First, second, third, and fourth swim- 

 ming legs. 



Platb LXVIII. 

 Females of Ergasilus megaceros and E. elongatus. 



Fig. 57. Dorsal view of E. megaceros 

 Fig. 58-61. First, second, third, and fourth swim- 

 ming legs. 



Fig. 62. Dorsal view of E. elongatus. 

 Fig. 63-66. First, second, third, and fourth swim- 

 ming legs. 



Platb LXIX. 

 Female of Ergasilus elegans. 



FlG.'67. Dorsal view. 

 Fig. 68. Second antenna. 

 Fig. 69. Mouth parts. 



Figs. 70-73. First, second, third, and fourth swim- 

 ming legs. 

 Fig. 74. Nauplius larva of E. cceruleus. 



Plate LXX. 

 Female of Salmincola calif orniensis . 



Fig. 75. Dorsal view. 



Fig. 76. Side view. ^ 



Fig. 77. Top of head. 



Fig. 78. Second antenna, side view. 



Fig. 79. Ventral view of same. 



Fig. 80. Mandible. 



Fig. 81. First maxilla. 



Fig. 82. Maxilliped. 



Plate LXXI. 

 Male and first copepodid larva of Achtheres pimelodi. 



Fig. 83. Side view of male. 



Fig. 84. First and second antennae. 



Fig. 85. First maxilla. 



Fig. 86. Dorsal view of larva. 



Fig. 87. Mouth parts: md, mandible; mx, first 



maxilla. 

 Fig. 88. Second maxilla. 

 Fig. 89. Maxilliped. 



Plate LXXII. 

 Female of Lernceocera variabilis. 



Fig. 90. Ventral view. 



Fig. 91. Headandanteriorthorax, much enlarged. 



Fig. 92. Scale of fish host, showing mode of 



attachment. 

 Fig. 93. First antenna. 

 Fig. 94. Second antenna. 



Fig. 95. Mouth parts: md, mandible; m.x^, first 

 maxilla; mx', second maxilla; lb, labium. 



Fig. 96. Maxilliped. 



Fig. 97-100. First, second, third, and fourth 

 swimming legs. 



Fig. ioi. Anal lamina. 



