146 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 5S. 



Plate 9. 



Female of Phrixocephalus trianffulua. 



Fig, SO. Dorsal view of head and neck, side view of trunk. Fig. 81. Ventral 

 view of head and neck with swimming legs. Fig. 82. Diagonal view of head, 

 showing antennae. Fig. 83. Anterior view of head with processes. Fig. 84, 

 Lateral view of cleared specimen, showing reproductive organs. 



Plate 10. 



Phrixocephalus triangulus, P. diversus, and Lernaeocera branchialis. 



Fig, 85, Ventral view of cleared specimen of P. triangulus, showing bilateral 

 symmetry. Fig, 86. Diagonal view of P. diversus. Fig. 87, Side view of same, 

 showing asymmetrical position of neck. Fig. 88. Metanauplius of Lernaeocera 

 hranchialis ; actual length. 0.55 mm. 



Plate 11. 



Female of Collipravua parvus. 



Fig. 89. Ventral view of head, side view of body. Fig. 90. Side of head (o). 

 Fig. 91. Dorsal view of same. Fig. 92, Ventral view of head (6). Fig. 93. 

 Dorsal view of -same. Fig. 94. Dorsal view of second antennae. Fig. 95. 

 Proboscis and maxillae. Figs. 96, 97. Dorsal and ventral view of cleared speci- 

 men, showing asymmetrical arrangement of reproductive organs. 



Plate 12. 



Female and nauplius of Lernaeocera hranchialis. 



Fig. 98. Side view. Fig. 99. Central view of head. Fig. 100. Anterior view 

 of head ; these three figures drawn by J. H. Blake. Fig. 101. Side view of head 

 with proboscis protruded. Fig. 102. First and second antennae. Fig. 103. 

 Mouth tube and first maxillae. Fig. 104. Second maxilla. Fig. 105. Swimming 

 legs. Fig. 106. Anal laminae. Fig. 107. Newly hatched nauplius; actual length. 

 0.45 mm. 



Plate 13. ' 



Female of Lemaeolophus sultanus. 



Fig. 108. Side view. Fig. 109. First and second antennae. Figs. 110, 111. 

 Swimming legs. Fig. 112. One of the abdominal plumules. Fig. 113. Side view 

 of cleared specimen, showing digestive tube and reproductive organs, 



Plate 14, 



Female of Haemohaphes cyclopterina. 



Fig. 114. Side view of trunk, dorsal view of posterior neck, ventral view of 

 anterior neck and head. Fig. 115. Dorsal view of cephalothorax. Fig. 116. 

 Ventral view of same. Fig. 117. Ventral view of anterior head. Fig. 118, Side 

 view of cleared specimen showing reproductive organs. 



Plate 15. 

 Females of Pennella antarctica and P. filosa. 



Fig. 119. Side view of P. antarctica. Fig. 120. Pieces of whale blubber with 

 parasites in place; the piece on the right shows the scar left after the dis- 

 appearance of the parasite; photograph by Dr. Roy O. Andrews. Fig. 121. 



