1908] Bradley. — Am phi pods of ihe Genus Corophium. 231 



a pair of spines l)c]ow and one foui-th of the way towaixl the apex 

 with anothei- spine; third segment not half as long- as second. 

 Flagellnm sub-equal to peduncle, the basal segments shorter than 

 those beyond. Second antennae (pi. 9, fig. 1) very stout, the 

 first segment with a pyramidal process on the lower margin ; the 

 second with a small spine near the apex of the lower margin; the 

 penultimate produced into a large slightly recurved spine at the 

 distal end of the lower margin, without any teeth above its apex ; 

 its lower margin at a distinct angle to that of the segment bear- 

 ing it. The ultimate segment subcylindrical, a little more than 

 one-third as thick as the preceding, produced at apex into a lobe 

 on one side, extending a little less than one-third of the length of 

 the first segment of the flagellum, the basal half of the lower mar- 

 gin bearing two stout spines. Flagellum shorter than the ulti- 

 mate segment of the peduncle, three-segmented, the first segment 

 over four times longer than the second, the third minute, bearing 

 tM'O curved terminal spines and numerous setae. In a young 

 female (pi. 9, fig. 6) the basal segment of the first antennae is 

 broader, and in addition to the small basal spine there are three 

 long and slender spines; the flagellum is shorter than the pe- 

 duncle. The second segment of the second antennae (pi. 9, fig. 5) 

 has a pair of spines near the apex longer than the ones in the 

 adult (pi. 9, fig. 1). The penultimate segment, instead of the 

 large curved spine near the apex of the inferior margin, bears 

 thereon three pairs of rather long spines and the margin is sin- 

 uate. The penultimate segment bears no spines along its margin, 

 and is devoid of the process at its apex. The terminal hooks of 

 the flagellum are nuich longer and the entire antennae are short 

 and thick. 



The second antennae of the supposedly adult male (pi. 9. 

 fig. 4) are about one-third longer than the first pair (pi. 9, fig. 3). 

 The basal segment of the first pair is not very stout, unarmed, 

 scarcely longer than the second ; the third segment not half as 

 long as the second ; flagellum slightly shorter than the peduncle ; 

 the basal segments shorter than those beyond. The second an- 

 tennae stout; the basal segment with an obscure process or fold 

 beneath ; the second unarmed ; the penultimate produced into a 

 large slightly recurved spine at the distal end of the lower 



