AMPHIPODA OF SOUTHERN NEW ENGLAND. 



515 



elongated, last two joints of subequal length, terminal one being usually slightly shorter; flagellum 

 rather thick and shorter than last joint of peduncle; coxal plates not as deep as their segments; first 

 gnathopods in male very large and powerful; carpus enormously developed, broadly suboval in outline 

 and produced at postero-distal angle into a lobe which projects beneath the propodus and bears two 



large teeth; behind the latter two smaller teeth on posterior margin; propodus about two-thirds as 

 broad as long, posterior margin with two or three irregular tuberculiform prominences; first gnatlm- 

 1 ii "Is in the female simply subchelate; carpus about two-thirds as wide as long; posterior margin rather 

 long and thickly setose; propodus a little narrower than carpus but about as long; palm oblique, evenly 

 convex, with a spine at the posterior end; dactyl serrate within; second gnathopods with carpus 

 narrow with a rather long ciliated posterior margin which is nearly straight; carpus rectangular, over 

 three times as long as wide; palms transverse; dactyl stout, serrated within; terminal peraeopods about 

 reaching tipof uropods; first uropods with a long spine at distal end of peduncle which extends nearly 

 to middle of rami; telson oblong, distally rounded. 



Length, 8 mm. 



European coast from Norway to the Mediterranean; Lung Island Sound and Vineyard Sound 

 (Smith); Provincetown (Rathbun); Woods Hole, common in the Eel Pond. 



Microdeutopus danmonensis (Bate). 



Eyes nearly round; first antennae over half the length of body, first segment somewhat shorter 

 than head, not so stout as in preceding species; second segment markedly longer than first and over 



Ofir' 



Microti* utopus danvumensU. W Is Hole, Mass. 



twice the length of third; flagellum slender, longer than peduncle; secondary flagellum about as long 

 as last joint of peduncle and composed of two long segments, and usually a minute terminal knob-like 

 segment; second antenna? about two-thirds as long as first, peduncle elongate, more slender than in 

 gryllotalpa; last basal joint not longer than preceding one but equaling or exceeding flagellum; first 



