2 CO 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 c?. The fifth pair of legs in anterior view ; x 65. 



— 5d. Yc? (V). The fifth pair of legs of an abnormal male; x 65. 



— 5e. Yc? (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. 6a. Y? (V). The oral surface of the labrum; x 200. 



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



— 6c. Yc? (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. 9 a. f 5. The head etc. from the left; x 77. 



— 9 b. 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 5- 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$. F'irst abdominal somite from the left; x 152. 



— lb. f?. First abdominal somite from below; x 152. 



— I c. 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. 



— 2 b. Yc?(V). Pes V; x 77. 



Fig. 3. Chiridius armatus Boeck. 

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



— 3 b. f$. Labrum -oral view, g^— g^ the second and fourth groups of the lateral longitudinal series. 



St the fourth central circular spot; x 200. 



— 3 c. f$. Lamina labialis and serrulae 6-dentatae; x 280. 



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



— 3e. fc?. Pes V sin; the endopodite; x 280. 



A 



