242 AMPmPODA NOHMALIA. 



angle. AntcnnoD elongated : superior pair two-thirds as long as the 

 inferior ; inferior nearly equal in length to the body, attenuated. 

 Gnathopoda hav'ing the propoda not dentated, equal, oval, not 

 larger [broader ?] than caipus. Body and anteunaj sprinkled with 

 numerous black points, fasciatcd on the segments of the pleon. 

 Posterior pair of pcreiopoda not serrated on the posterior margin 

 of their basa, but armed with three or four short spines. 

 " Length ^ths of an inch. 



" Hah. Egg Harbour." — Saij. " Duck Island moorings, Grand 

 Manan, in 4 fathoms, on a nullipore bottom." — Stim^son. 



" Perfectly distinct from A. dentata by the more elongated and 

 less robust antemiDD." — Say. 



17. Amphithoe maculata. 

 Ampliithoe macidata, Stimpson, Marine Invert, of Grand Manan, p. 53. 



" Body rather broad, smooth and well rounded above. Coxae of 

 moderate size, those of the fifth pau- largest. Antennae rather 

 stout, subequal ; inferior ones subpediform, with very short ter- 

 minal articuli. Second pair of gnathopoda having the propodos 

 larger than the first. Five pairs of pereiopoda with small, sharp, 

 curved dactyla ; third pair very short. Posterior pleopoda very 

 short and thick. 



" Length 0-65 inch ; of antennae 0-22 inch. 



" Hah. Eocky bottoms, Laminarian zone, and occasionally at low 

 water. 



"It ^^evs horn A. punctata in being more robust and of much 

 harder structure; also totally in colour." — Stimpson. 



18. Amphithoe filigera. 



Amphithoe filigera, Stimpson, Proc. Acad. Nat. Sc. Pkilad. May and 

 June 1855. 



" Body thick about the middle, compressed towards the extremities ; 

 a few setiferous points on the posterior abdominal segments. Coxae 

 large. Eyes rounded, bright vermilion. Antennfe very slender ; 

 the superior ones nearly as long as the body, their hair-like forty- 

 articulate flagella constituting four-fifths of their length. Gnatho- 

 poda in the males subequal, of moderate size, very hairy, deeply 

 notched below for the reception of the closed dactylos. Posterior 

 pair of pleopoda short-ovate or heart-shaped, with small palpi- 

 form rami. Colour olive punctate. Coxae greenish. 



" Length ^ an inch. 



" Hab. Loo Choo." — Stimjjson. 



