192 REPORT OF NEW JERSEY STATE MUSEUM. 



Gammariis oniatus Milne-Edwards, Ann. Sci. Nat. Zool., XX, 1830, p. 367, 



PI. 10, figs. i-io. Boston, Mass. 

 Verrill, Rep. U. S. F. Com., I, 1871-72 (1873), p. 314, PI. 4, fig. 15. 



Among rock-weed near low water. New Jersey to Labrador. 



S. I. Smith, Rep. U. S. F. Com., I, 1871-72 (1873), P- 557, PI- 4- fig. 15. 



New Jersey to Greenland. 



Kingsle}^ Standard Nat. Hist., II, 1884, p. 76. fig. 104. Our shores 



(eastern U. S. understood). 



Leidy, Proc. xA.cad. Nat. Sci. Phila., 1888, p. ;i32- Beach Haven, New 



Jersey. 



— Heilprin, An. Life of our Sea Shore, 1888, p. 96, PI. 7, fig. 5. New 



Jersey and south shore of Long Island. 



Description. — Body compressed, rather slender, elongated. 

 Cephalon convex. Eyes reniform, nearly extend to front edge 

 of short lateral cephalic lobes. First antennae slightly longer 

 and more slender than second, and in females usually shorter 

 than body length. First joint of first antennae a little longer 

 than second, which twice as long- as third. Secondary flagellum 

 longer than second joint of peduncle, about eight-jointed. 

 Second antennae with stout peduncle, last two joints subecjually 

 long, and flagellum shorter than peduncle. First gnathopods of 

 male with hand elongate, tapers from near base, hind edge 

 continuous with somewhat uneven palm, stout spine near middle 

 and large spine with row of several smaller ones above its 

 distal end. Second gnathopods of male with much larger hand 

 than that of first pair, about twice length of carpus, contour 

 subquadrate. Somewhat uneven and oblique palnis sharply de- 

 fined from hind edge, with stout spine near middle and large 

 spine followed by several smaller ones near distal end. Female 

 gnathopods smaller than in male, more equal in size and uniform 

 in shape. First pair of gnathopods in female less narrow than 

 those of male, and hand of second pair similar to that of male in 

 shape, with palm less oblique than those of first gnathopods. 

 Postero-lateral angles of second and third abdominal segments 

 acute, produced, margin above angles generally with short setae. 

 Three posterior segments with median projection bearing fascicle 

 of spinules and lateral fascicle on either side. Last pair of 

 uropods with both rami stout, inner nearly long as first joint 

 in outer, and inner edge with about four stout spines. External 



