350 COPEPODA 



Fig. 5. Eucalanus elongatus Dana. 



Fig. 5 a. f $. The oral surface of the labrum ; x 200. 



5 b. f $. The lamina labialis etc. ; x 200. 



5 c. f J 1 . The fifth pair of legs in anterior view; x 65. 



56. YJ* (V). The fifth pair of legs of an abnormal male; x 65. 



5e. Y <? (V). The fifth foot in ant. view ; x 65. 



5f. YC? (V). The fifth foot in ant. view; x 65. 



Fig. 6. Eucalanus attenuatus Dana. 

 Fig. 6 a. Y $ (V). The oral surface of the labrum ; x 200. 



6b. Y. (V). Lamina labialis; x 200. 



- 6c. YcT (V). The fifth foot in post, view; x 77. 



Fig. 7. Eucalanus crassus Giesbrecht 

 Fig. 7 a. f$. The coecal sac; x 44. 



Fig. 8. Pseudocalanus minutus Kroyer. 

 Fig. 8 a. f $. The oral surface of the labrum ; x 280. 



Fig. 9. Clausocalanus arcuiformis Dana. 

 Fig. ga. f $. The head etc. from the left ; x 77. 



gb. f $. The genital somite from the left; x 77. 

 9 c. f $. The oral surface of the labrum ; x 260. 



9 d. f $. The lamina labialis etc. ; x 260. 



Fig. 10. Spinocalanus abyssalis Giesbrecht 

 Fig. 10 a. f $. The oral surface of the labrum ; x 260. 



10 b. f ?. The lamina labialis etc.; x 260. 



Plate II. 



Fig. i. Aetidius armatus Boeck. 



Fig. i a. f $. First abdominal somite from the left; x 152. 

 r b. f$. First abdominal somite from below; x 152. 



ic. f$. Basipodite of pes IV sin. in posterior view; x 152. 

 id. f$. Lamina labialis etc.; x 280. 



Fig. 2. Chiridius obtusifrons G. O. Sars. 

 Fig. 2 a. f$. The labial structures; x 280. 

 2b. Y<? (V). Pes V; x 77. 



Fig. 3. Chiridius armatus Boeck. 

 Fig. 3 a. f$. Pes II sin. anterior view; x 77. 



3 b. fij>. Labrum oral view, g 2 g4 the second and fourth groups of the lateral longitudinal series. 



S* the fourth central circular spot; x 200. 

 3 c. fij?. Lamina labialis and serrulae 6-dentatae; x 280. 

 3d. f$. Area labialis et postlabialis ; x 147. 

 36. fj 1 . Pes V sin; the endopodite; x 280. 



