THE CRUSTACEA OF NEW JERSEY. 417 



Lupa dicantha (ncc Latreille) De Kay, N. Y. Fauna, Crust., VI, 1844, p. 10, 



PI- 3. fig- 3- Florida to Cape Cod. 

 Leidy, Journ. Acad. Nat. Sci. Phila., (2) III, 1855, p. 149. Absecon 



and Great Egg Harbor, N. J. 

 Callinectcs dicanthus A. Milne-Edwards, Miss. Sci. Mex. Crust., V, 1878, p. 



223, PI. 41. Atlantic coast of America. 



Description. — Carapace moderately convex and depressed, sur- 

 face rather uneven and dorsal grooves more or less distinct. 

 Contour of carapace generally ellipsoid, anterior half nearly 

 evenly hemispherical, and posteriorly sides narrowing with very 

 oblique edges to moderately broad posterior straightened edge. 

 Front with four distinct flattened spines, outer, which forms 

 inner orbital edge, slightly larger or with broader base. Contour 

 of front as formed by these spines very slightly convex. Orbital 

 edge above with two slight notches, one about midway and other 

 external. Outer orbital spine a little larger than seven subequal 

 spines along front lateral edge, though at widest part of carapace 

 much larger angular and narrower spine points directly out. 

 From this lateral spine fine beading of minute tubercles generally 

 bends up till opposite outer orbital spine, though not above level 

 of sixth front lateral spine. Posterior lateral edges of carapace 

 slope obliquely, though somewhat bent down medianly, towards 

 median line. Hind carapace edge slightly convex or concave. 

 Upper surface of carapace finely tuber culate, rather sparsely so 

 over front half, close-set behind middle, when soon gradually 

 crowded and smaller. Orbit rather large, slightly ovoid, and 

 lower edge with spine-like process projecting forward, similar 

 and but little external to inner supraorbital, though visible as 

 seen from above. 



Eye-stalks moderate, about same thickness as rounded eyes, 

 and outer basal surfaces hairy. Antennules slender, of 

 two long slender subequal joints, with larger of two short 

 flagella about two-thirds length of outer joint. Antennae 

 long, slender, filamentous flagellum reaches to fourth anterior 

 lateral spine beyond eye, and peduncle of three joints, basal 

 largest and third smallest. Lower surface of carapace laterally 

 smooth in front, posteriorly somewhat villose. Outer maxilli- 



27 MU 



