AMPHiri'liA OF ^ol'THERN NEW ENGLAND. 



483 



first joint of peduncle somewhat longer than both the other two, third joint much wider than long; 

 flagellum thick and tapering, secondary flagellum minute; peduncle of second antennae much more 

 slender than that of first and a little longer than the flagelluui; thorax tumid, first five coxal plates 

 taken together forming an almost semicircular plate; the Becond, third, and fourth much deeper than 

 their segments; first and second gnathopods small, similar, subchelate hands narrow; basal joint of 

 last perseopods much enlarged, postero-inferior angle acute or subacute; fourth abdominal segment 

 with a dorsal depression; telson acute, with a narrow posterior incision extending beyond the middle. 



This species i- said by Hansen to attain a length of 47 nun. 



Extensively distributed in the Arctic and North Atlantic oceans. I have examined specimens 

 taken at Grand Manan (100 fathoms); Eastport; off Head Harbor, Me. (100 fathoms); and near 



W is Hole. 



Metopa groenlandica Hansen. 



Stimpson, Marine Invert. Grand Manan, p. 51 

 Female: Eyes nearly round; antennae of nearly equal length; peduncleof first with first two joints 

 of subequal length, third joint about a third t he length of second; flagellum shorter than peduncle 

 and composed of about nine joints; peduncleof second antenna- much longer than that of first, last 



Metopa grosntandiea. Eastport, Me. 



joint a little shorter than preceding one but somewhat longer than the flagellum, which consists of 

 about six joints, of which the first is much the longest; second, third, and fourth coxa! plates very 

 large and of subequal depth, second produced forward as far as eyes and broadly rounded in front; 

 fourth coxal plate longer than deep, subqttadrate with rounded angles, and about equal in length to 

 three segments of thorax; mandibles with first joint of palp short, second expanded, a little over 

 twice as long as wide, the inner margin setose: third joint small, scarcely a third the length of second 

 and not half so wide: maxillipeds with inner plates distally rounded and nearly reaching extremity 

 of the following joint, which is slightly produced at inner distal angle into a rudimentary outer plate; 

 palp large, first three joints of nearly equal size; fourth joint in the form of a large incurved claw; 

 first gnathopods small, basal joint narrow, carpus large, longer and broader than hand and setose on 

 surface and both margins; hand narrowed toward base, palm transverse; second gnathopods with 

 carpus produced into a narrow, posterior lobe; hand large, oblong, palm convex ami dentate, ending 

 above in a sinus which lies just within the base of a large tooth; first two perseopods slender, devoid 

 of spines; last two perseopods with basal joints much dilated, especially in last pair; first uropods 

 with rami shorter than peduncle: second pair with longer ramus nearly equal to peduncle; single ramus 

 of terminal uropods aboutequal to peduncle, and pointed apical division of ramus nearly as long as 

 basal part; telson oblong, the extremity narrowly rounded. 



The color is described by Stimpson as "bright yellow; in the young pale bluish. Eves conspic- 



Ul IUS, red." 



Length, 7 mm. 



Grand .Manan (Stimpson); Eastport, Me.; Albatross stations 2057 and 2062; (Greenland (Hansen). 



