132 BRITISH COPEPODA. 



opportunity of examining his captures. Mr. Norman 

 has also recorded N. prasina as occurring in the same 

 Ascidian in Shetland. 



Sub-family 2. DOEOPYGIN^I, nov. sub.-fam. 



Body more or less compressed ; anterior antennae 

 short, 8 10-jointed; in the male not modified for 

 clasping. Caudal segments curved and bearing very 

 small apical spines. 



Genus 2. DOEOPYGTJS, TJwrell (1859). 



Body dorsally elevated, somewhat compressed ; 

 caudal segments bearing at their apices curved spines 

 or hairs. Anterior antennae 8- to 10-jointed; very 

 small, about one third the length of the first body 

 segment, posterior 3-jointed, terminating in a curved 

 claw. Basal joint of the mandible - palp large, 

 2-branched, the external branch composed of one, 

 the internal of two joints. Maxillae composed of a 

 prehensile aculeated portion, and three or four more 

 or less rounded segments, which are fringed with 

 finely plumose branchial filaments. First pair of foot- 

 jaws broad, sub triangular, 5-jointed, the last joint 

 minute ; second pair elongated, 3-jointed ; both pro- 

 vided with numerous strong marginal setae. Branches 

 of the first four pairs of feet usually 3- (rarely 2-) 



