AMPHIPODA (IK SOUTHERN NEW EMUI.ANH. 



479 



several large, plumose setae; flagellum shorter than peduncle and composed of about >ix joints; 



secondary flagellum over half the length of primary one and < iposed of about five joints; second 



antenna; Blightly longer than first, the penultimate basal joint broadlj expanded and rounded 

 below, where it bears about seven large, plumose seta; and several curved spines; flagellum shorter 

 than peduncle and composed of 5-7 joints; first four coxal plates much deeper than their segments 

 and fringed below with long, plumose setae; first and second gnathopods of nearly equal size; hands 

 oval; palm oblique and defined posteriorly by a prominence; posterior perseopods with the widely 

 expanded basal joint produced and rounded below, and coarsely dentate oil the posterior margin 

 with a few irregular and sometimes obscure teeth; posterolateral angle of third abdominal segment 

 produced into a slender, slightly upturned spine: telson about as broad as long, the lobes distally 

 rounded. 



Length, 7 nun. 



Arctic regions; Norway; Greenland; Grand Manan; Albatross station 2212. 



Anipelisca macrocephala Lilljeborg. 



Pseiidophthalmus pclagicu* Stimpson, Marine [nvert. Grand Manan. p. 57, 1853. 

 Ampelkca sp. Smith, Rept U.S. Fish Com. 187] ■-!. p. 661, pi. iv. flg. 17. 



Head about as long as first three segments of thorax; eyes surrounded with bright-red pigment; 

 lower corneal lens at antero-lateral angle of head; first antenna- in the female often shorter than 

 peduncle of second pair; second antenna' of the female scarcely exceeding half the length of body, 



e r, 



Ampelisca macrocephala, female. Wooda Hole, M^- ' i> .■ Side plal third abdominal segment. 



last segment of peduncle shorter than preceding one; first pair of coxal plates distally widened and 

 extending as far forward as the eyes; propodus of first gnathopods oblong, about as long as carpus; 

 that of second gnathopods about half as long as carpus; dactyl of first and second perseopods consid- 

 erably larger than the two preceding joints combined; last perseopods with basal joint broadly 

 rounded below; ischium broader than long; merits deeply concave below, and produced into a pointed 

 setose lobe at tin' lower posterior angle; carpus more or less heart-shaped; lower posterior angle more 

 produced than corresponding anterior one and armed with several spines; propodus oblong; lower 

 posterior angle rounded and slightly produced; dactyl slender, often a little longer than propodus; 

 posicio lateral angle of third abdominal segment with a long, acute, slightly upturned projection, 

 above which is a rounded sinus followed by a rounded lobe; fourth abdominal segment in the female 

 with a slight dorsal depression followed by a carina, which ends abruptly at the posterior end; 

 penultimate uropods with outer ramus armed near tip with a very long spine. 



Length, 15 mm. 



Woods Hole; Newport; Spanish Bay; Cape Ann; Casco Bay, Maine; off Halifax; (.rand Manan. 



Specimens taken from near Woods Hole differ from those figured in Sars's • Irustacea of Norway 



