AMPHIPODA OF SOUTHERN NEW ENGLAND. 



495 



KaMragcsfalvocinctius. Ipswich Bay, Mass. 



Halirag-es fulvocinctus (M. Sars). 



Pherusa tricuspid Stimpson, Proo. 4cad. Nat. Sci. Pliila. 186'.:, p. Visi. 



Atylw | Paramphithot i im rmix • Kroyer li<le Boeck) Packard, Mem. Bo-;. Sue-. Nat. Hist.. Vol. I. 1867, p. 298, pi. 8, figs. :i-3l>. 



Head with a small, downwardly curved rostrum; eves large, broadly reniform, pale in alcoholic 

 specimens; both pairs of antennae long and slender, the first, which is usually a little the longer, often 

 exceeding length of body; peduncle of first antenna' with first joint longer and stouter than second; 

 third joint shorter than the second, with its anteroinferior angle produced into a laminate, pointed 

 process which is furnished below with calceoli, as are also the lower margins of second and of basal 

 portion of third segment; segments of flagellum with calceoli on lower side of each; second antennae 

 with last two basal joints subequal, penultimate one reaching distal end of peduncle of first 

 antennae; flagellum and last two joints of peduncle with calceoli along upper margin; first four coxal 

 plates of moderate size, scarcely as deep as their segments, the fourth about as wide as long and concave 

 behind; last segment of thorax and 

 first two segments of abdomen pro- 

 duced posteriorly in mid-dorsal line 

 into a large spine; lateral portion of 

 first abdominal segment broadly 

 rounded below, with a minute cusp 

 a little behind middle of lower mar- 

 gin; postero-lateral angle of second 

 abdominal segment projecting as a 

 small tooth, above which the pos- 

 terior margin presents an angular 

 prominence; postero-lateral ancle of 

 third abdominal segment with a 

 prominent tooth, above which the 

 posterior margin bears a large up- 

 turned tooth; margin between these two t( eth serrated; gnathopods small, nearly equal in size and of 

 similar form; basal joint elongate, curved forward in the first and a little backwards in the second; 

 carpus lone, a little broader relatively and a little more obliquely truncated at postero-distal angle in 

 first than in second pair; hands narrow, palm oblique, with a row of four spines on outer side at 

 distal end; uropods with flattened, narrow rami; first two pairs with outer ramus markedly shorter 

 than inner and tip of each ramus armed with a cluster of spines; second uropods markedly shorter than 

 lirst or third, third extending backward only a little farther than first; rami of third uropods of nearly 

 equal length and over twice length of peduncle, much broader than those of preceding uropods, and 

 lanceolate in form, terminating not in a cluster of spines but in an acute tip; telson oblong, tapering 

 distally. concave above, tip with a shallow emargination. 



The color, according to M. Sars. is "a pellucid yellowish-white marked with rings of brownish- 

 yellow in the posterior dorsal margin of each segment; antenna' with brownish rings; eyes red." 



Length, 17 mm. 



Arctic regions; Labrador (Packard, Smith); "south of Halifax, Nova Scotia; latitude 43° 3' N., 

 longitude 63° 39' \V. ; depth 85 fathoms" (Stebbing); Ipswich Bay, 27 fathoms. 



In some of the specimens which I have examined the lirst antenna- are shorter than the second, 

 while in others they are longer, sometimes exceeding the length of the body, as described by M. Sars. 



Apherusa gracilis Holmes, new species. 



Head with front obtuse, curved downward; eyes large, pale in preserved specimens; lateral cor- 

 ners of bead rounded; lirst four coxal plates well developed, much higher than their segments, the 

 first somewhat expanded distally, fourth about as wide as deep ami slightly emarginate posteriorly; 

 gnathopods similar; carpus in first pair a little wider than propodus, evenly rounded and setose poste- 

 riorly; hand oblong-oval, scarcely longer than carpus; palm evenly convex and not sharply marked 

 off from posterior margin and bearing a pair of spines near the end; second gnathopods with carpus 

 subtriangular, much less comix posteriorly than in first gnathopods; hand oblong, longer and broader 

 than carpus, widest near upper end of palm, where there are a few spines; first two segments of abdo- 



