47 



COPEPODA 



i. Cyclops, dorsal view. Steady the animal with a coverslip on a slide. (Low power.) Carapace; 

 eye; ist and 2nd pairs of antennae (uniramous) ; four appendage-bearing thoracic segments behind 

 the cephalo-thorax ; ist abdominal segment, double in the male, single in the female. The generative 

 openings are on this segment and the ovisacs are attached to it; three posterior abdominal segments, 

 of which the last bears the caudal fork; genital gland in the thorax; alimentary canal. 



Segments as follows : 



P/ant. i. 

 ant. 2. 



Head < mandibles. 

 I maxilla i. 

 v maxilla 2. 

 Thorax, maxillipeds (uniramous). 



5 pairs of biramous appendages (last much reduced). 



Abdomen without appendages. 5 segments in males, 4 in females. 



