508 



BULLETIN OF THE BUREAU OF FISHERIES. 



Body olive brown t<> grayish, marked with numerous small rounded lighter colored spots and a 

 series of larger light spots along mid-dorsal line. Pigment scattered as in Melita nitida. In specimens 

 with much gray pigment the legs are barred with dark bands; in others these bands may be scarcely 



visible. The extreme tips of the basal joints of both antenna' arc light colored: eves black. 



Length, 10 mm. 



New Jersey; Long Island Sound; Vineyard Sound (Smith i; I'rovincetown (Eathbun); Woods 

 Hole, Mass. 



Found under rocks and among seaweed at low tide. 



(iammart Uus angulosus 



Sam. 



Gammarellus angulosus (Rathke). 



AmathiUa angutosa Bocek, Amphip. boreal, arct., p. 137, 1870. 



I bail with rather large oblong or reniform eyes; lateral angles rounded; rostrum very short; 

 antenme rather stunt, subequal, scarcely half the length of body; peduncle of first pair with joints 



decreasing successively in length and width; rlagellum longer than 

 peduncle; secondary flagell urn four-jointed; second antenme with 

 rlagellum larger than peduncle, segments, like those of first pair, 

 furnished with a terminal circlet of sensory chilis; body with a dorsal 

 carina which extends from head to near end of abdomen, not so high 

 as in Gr. homari and not extended as a posterior projection from the 

 end of cadi segment; first four coxal plates rather small, not so deep 

 as their segments, quadrate in form and increasing successively in 

 size from first to fourth; gnathopods, aside from coxal plates, of 

 almost exactly same form and size; hand narrowly ovate; palm 

 setose and armed with four or five fascicles of strong spines; three 

 posterior perseopods of nearly equal length; dactyls of all pairs simi- 

 lar and furnished with a single prominent seta near the distal end 

 of lower side; postero-lateral angles of first three abdominal seg- 

 ments rounded; terminal uropods with rami flattened, lanceolate, 

 broader than in G. homari, the margins furnished with spines and plumose seta?; outer ramus a little 

 larger than inner one; telson nearly as broad as long and slightly emarginate at tip. 

 Length, 10 mm. 



Norway (Sars); British Isles; France; Nahant; Casco Bay, Me. 



(i. iiiiijiiIiisii is closely allied to G. homari, but differs from it in being of smaller size, in having no 

 posterior projections from the dorsal side of body segments, in having shorter and stouter antenme, 

 and in the shorter telson. <i. homari has been reported from < brand Manan under the name of Gam- 

 mnrus sabinii by Stimpson. Another species, Gammarus macrophihalmus, is described by Stimpson 

 from the same locality. It is said to be very closely allied to the preceding species ('.'. xnh'niii) in 

 color and general appearance. The back, however, is carinated only at the abdomen, which readily 

 distinguishes it. The appendicular branches of the superior antennae are minute, and scarcely per- 

 ceptible. Eyes very large, subreniform, near each other; epimera small; caudal stylets of first pair as 

 large as those of second, both with their outer rami shorter and narrower than the inner ones; last 

 pair with broad, lancet-shaped rami, shorter than in G. sabinii. Color sometimes bright crimson, 

 but usually mottled red and flake white; very variable. Length 0.5 inch; of the inferior antenna 1 , 

 which are longest, 0.2. Were it not that Stimpson states that in macrophthalmus the back is carinated 

 only at the abdomen and describes the secondary flagelluni of the first antenna' as "minute, and 

 scarcely perceptible," I should be inclined to regard this species and angvlosa as identical. 



Chelura terebrans Philippi. 



Body robust, somewhat depressed; head tumid; antenna- shorter than half the length of thorax; 

 second antenna- with ttagellum consisting of a large oblong joint, setose on the edges, and one or two 

 minute terminal joints; coxal plates small, diminishing in depth posteriorly; third abdominal segment 

 with a median dorsal posteriorly directed spine-like projection, which is very large in the male; last 

 three abdominal segments coalesced; uropods peculiarly modified for boring, the first pair lying under 

 the abdomen and having a long peduncle with two short rami; second uropods subdorsal, peduncle 



