CRUSTACEA. 



front view of head in outline; c, superior antenna; d, inferior, 

 ibid. ; e, caudal extremity. — p. 1005. 



Fig. 2 a. PnoRCus iiyalocephalus, enlarged eight diameters ; 

 b, antenna; c, caudal extremity. — p. 1006. 



Fig. 3 a, b. Ditiiyrus faba, enlarged four diameters ; c, ventral 

 view, part of organs omitted, and showing three posterior coxa? 

 of one size thrown back ; d, front view of head ; e, antenna ; /, 

 maxillipeds; g, leg of first pair; h, ibid., of second pair; i, ibid., 

 of third or fourth pair ; 1c, abdominal natatories ; I, caudal seg- 

 ment, under view; m, stylets of first pair. — p. 1010. 



Fig. 4 a. Thyropus diaphanus, enlarged ten diameters ; b, 

 same, dorsal view, enlarged five diameters ; c, inner antenna ; d, 



outer, ibid. ; e, leg of third or fourth pair ; /, caudal segment, 

 under view; g, stylet of first pair. — p. 1013. 



Fig. 5 a. Pronoe brunnea, enlarged six diameters; b, dorsal 

 view, enlarged four diameters; c, inner antenna; d, outer, ibid.; 

 e, leg of third or fourth pair; /, ibid., of fifth pair; g, ibid., of 

 sixth pair; h, ibid., of seventh pair; i, caudal extremity; Jc, h', 

 branches of first pair of stylets. — p. 1015. 



Fig. 6 a. Lyclea ociiracea, enlarged five diameters ; b, head, 

 in upper view; c, inner antenna; d, outer antenna; e, mandible; 

 /, leg of first pair; g, ibid., of second pair; h, caudal extremity, 

 —p. 1017. 



III. ENTOMOSTRAC A. 



PLATE 70. 



STRUCTURE of cyclopoidea. 



Figs. 1-8. Body : — 1 a. Calanus ; 1 b. Cyclops ; 1 o. Catopia ; 

 2. Laophon; 3. Calanus; 4. Eucha?ta; 5. Pontella; 6. Coryceeus; 

 7. Sapphirina; 8. Setella. 



Figs. 9-15. Head and eyes: — 9 a, b. Pontella; 10. Catopia; 

 11. Euchaeta; 12. Setella; 13. Calanus sanguineus; 14 a, b. Pon- 

 tella; 15. Corycams. 



Figs. 16-43. Anterior antenna? : — 16. Corycams; 17. Sapphi- 

 rina; 18a, b, 19, 20. Cyclops; 21. Calanus; 22, 23, 24. Eu- 

 cha?ta; 25. Undina; 26 to 36. Pontella; 37, 38. Candace; 39, 

 40. Oithona; 41. Acartia; 42 a, b. Cly temnestra ; 43. Setella, 



Figs. 44-55. Posterior antenna): — 44. Cyclops; 45. Setella; 

 46. Sapphirina; 47. Corycams; 48. Oithona; 49. Harpacticus; 

 50. Euchaeta; 51, 52, 53. Calanus; 54. Pontella; 55. Candace. 



PLATE 71. 



STRUCTURE OF CYCLOPOJDEA. 



Figs. 56-63. Mandibles : — 56, from a Sapphirina ; 57 a, b, 58. 

 Calanus; 59. Eucha?ta; 60, 61, 61a. Pontella; 62. Harpacticus; 

 63. Oithona. 



Figs. 64-73. Maxilla?: — 64. Corycams; 65. Sapphirina; 66. 

 Euchseta; 67, 68, 69. Calanus; 70, 71, 72. Pontella; 73. 

 Oithona; 73 bis. Candace. 



Figs. 74-81. Maxillipeds: — 74 a, b. Sapphirina; 75 a, b. Cory- 

 ca?us; 76. Harpacticus; 77. Pontella; 78. Euchaeta; 79. Oithona; 

 80, 81. Candace. 



Figs. 82-92. First pair of legs :— 82. Calanus; 83. Euclueta; 

 84, 85, male Corycams; 86. Setella; 87, female Corycams; 88. 

 Cyclops; 89. Cyclops; 90. Pontella; 91,92. Oithona. 



Figs. 93-100. Posterior legs:— 93. Calanus; 94. Acartia; 95, 

 female Pontella detruncata; 96, male, same Pontella; 97, 98, male 

 Pontella?; 99, male Candace pachydactyla ; 100, male Eucha?ta. 



Fio-s. 101-114. Abdomen and caudal lamella?: — 101. Calanus 

 or Pontella; 102,104. Calanus; 103. Eucha?ta; 105,106. Cy- 

 clops; 107. Harpacticus; 108. Oithona; 109, 110. Setella; 111. 

 Coryca?us; 112,113,114. Sapphirina. 



Fig. 115. Thyone; 116, 120. Notodelphys of Allman. 



PLATE 72. 



Fig. 1 a. Calanus rotundatus, enlarged ; b, extremity of ante- 

 rior antenna; c, side view, showing alimentary canal, i, i, and 

 heart, h; d, young, possibly of this species. — p. 1049. 



Fig. 2 a. Calanus comptus, enlarged ; b, extremity of anterior 

 antenna; c, abdomen, in profile. — p. 1050. 



Fig. 3 a. Calanus nudus, enlarged ; b, antenna of second pair, 

 —p. 1052. 



Fig. 4 a. Calanus magellanicus, enlarged ; b, natural position 

 of anterior antenna? ; c, extremity, ibid. — p. 1053. 



Fig. 5. Calanus crassus, enlarged. — p. 1054. 



Fig. 6 a. Calanus furcicaudus, enlarged ; b, extremity of 

 anterior antenna; c, profile of abdomen. — p. 1055. 



Fig. 7 a. Calanus arcuicornis, enlarged ; b, extremity of ante- 

 rior antenna?. — p. 1056. 



Fig. 8. Calanus turbinatus, enlarged. — p. 1057. 



Fig. 9. Calanus stylifer, enlarged. — p. 1058. 



Fig. 10. Calanus curtus, enlarged. — p. 1059. 



Fig. 11a. Calanus scutellatus, enlarged; b, extremity of 

 antenna. — p. 1060. 



Fig. 12 a. Calanus pavo, enlarged; b, antenna of second pair, 

 —p. 1061. 



PLATE 73. 



Fig. 1 a. Calanus l^evis, enlarged ; b, extremity of anterior 

 antenna. — p. 1062. 



Fig. 2 a. C. l^evis, another individual ; b, extremity of supe- 

 rior antenna; c, posterior antenna; d, leg of first pair. — p. 1062. 



Fig. 3 a. Calanus medius, enlarged ; b, extremity of anterior 

 antenna. — p. 1063. 



Fig. 4. Calanus placidus, enlarged. — p. 1064. 



Fig. 5 a. Calanus recticornis, enlarged ; b, extremity of ante- 

 rior antenna. — p. 1064. 



Fig. 6 a. Calanus setuligerus, enlarged ; a', side view, show- 

 ing alimentary cavity, i, heart, li; b, antenna of second pair; c, 

 leg of first pair; d, natatory leg of second or third pair. — p. 1065. 



