AMPHIPODA OF SOUTHERN NEW ENGLAND. 



509 



oblong, 

 serrate; 



with an immense dorsally projecting lobe, broad and coarsely serrated in the female, but 

 serrated, and thickly setose on the margin in the male; rami short, quadrilateral, distally 

 terminal uropods very large, inner ramus 

 minute, outer narrowly oval in the female 

 but narrow and much elongated in the male. 



Length to tip of telson, 5-6 mm. 



Extensively distributed along the coast 

 of Europe; from Norway to the Mediterra- 

 nean; east coast of the United States (Smith). 



This species, like the isopod Limiioria, 

 has the habit of boring in timber and is very 

 destructive to piles and other submerged 

 woodwork. 



Amphithoe long'imana Smith. 



Body rather slender; eyes round and red 

 in life; first antenn;e slender, about as long as 

 body; second basal segment longer than first, 

 and nearly twice as long as third; second antenna? stouter than first, especially in the male, and some- 

 what shorter; peduncle much elongated, and about twice the length of the flagellum; first five coxal 

 plates much deeper than their segments; the first strongly produced at anterior angle, and concave on 

 superior free margin, the three following plates oblong; gnathopods in male well developed, first pair 

 unusually elongated; carpus long and narrow; propodus three or more times as long as wide, as broad 

 as carpus and about as long; palm short, transverse; dactyl large and projecting when closed, far 

 beyond the palm; both carpus and propodus have the posterior margin thickly covered with rather 

 short set*; second gnathopods with carpus subtriangular, much shorter than propodus; propodus 

 oblong, much wider than in first pair; palm oblique, concave, posterior angle prominent. Gnathopods 

 in the female comparatively small; propodusof the first pair oblong, longer than carpus; palm oblique 



Chthira terebrans. After Snrs. The third uropods of the male 

 are drawn to a smaller scale than the other ports. 



Amphithois tongimana. Woods Hole, Mass. 



and rounded posteriorly, where it is armed with a strong spine; dactyl projecting beyond. palm, but 

 not nearly so far as in the male; in second gnathopods carpus produced posteriorly into a narrow, 

 distally setose lobe; hand oblong, shorter and broader than in first pair; palm oblique, defined pos- 

 teriorly by a slight projection and a strong spine; none of the angles of abdominal segments produced 

 posteriorly; terminal uropods with rami of suhequal length anil not more than half as long as 

 peduncle. 



Color very variable, ranging from dark reddish to light green. 



Length, 9 mm. 



Woods Hole, Mass. ; Vineyard Sound; Long Island Sound (Smith); New Jersey. 



The habits, color variations, and general natural history of this species I have described at length 

 in a previous paper (Biological Bulletin, vol. 1, 1901, pages 165-193). 



B. B. F. 1904—33 



