THE CRUSTACEA OF NEW JERSEY. 113 



spines only. Egg-tubes straight, uniserrate, close together and 

 usually much larger than the body. 



Male. — Carapace broad, well rounded, hind lobes prominent, 

 triangular, usually turned inward. Hind edge straight, armed 

 with pair of secondary lobes, one on either side, close to base of 

 posterior lobe. Lateral grooves distinct, turned sharply outward 

 near front end and extending to edge of carapace just behind 

 first antennae. Frontal plates wide, prominent, anterior margin 

 fairly straight and not deeply cut at center. Eyes often visible 

 in adults. Free thorax segments without dorsal plates, diminish- 

 ing in width from in front backward, first one (really second 

 segment) with pair of lateral lobes extending diagonally back- 

 ward and outward, others without lobes. Genital and sixth seg- 

 ments fused, considerably enlarged, furnished with two pairs of 

 rudimentary legs, one, the sixth, at posterior corners, and other, 

 the fifth, on lateral margins. Both pairs prominent. Abdomen 

 two-jointed, joints same size. Anal laminae large, well flattened, 

 armed with four large setae, of which inner separated from other 

 three. Ventral surface of carapace with same adhesion pads as 

 in female. Second maxillipeds enlarged, sometimes with ter- 

 minal claw and sometimes with pincher knobs, both varieties 

 occurring in the same species Four pairs of biramose swimming- 

 legs, all rami two-jointed and armed with large plumose setae. 



Pandarus sinuatus Say. 

 Plates 28, 29, and 150 Figure i. 



Pandarus sinuatus Say, Journ. Acad. Nat. Sci. Phila., I, 1818, p. 436. On 



Mustelus canis of our coast. 

 Wilson, Proc. U. S. Nat. Mus., XXXIII, 1908, p. 417, Pis. 32-33. Off 



Avon, New Jersey (on Mustelus). Albatross Station 2237 N. Lat. 39° 



12' 17" W. Long. 72° 9' 30" (from shark). 



Description of fenmle. — ^Carapace elliptical to ovate, broader 

 behind, about two-fifths entire body length, without egg-strings. 

 Posterior lobes short, mostly sharp and turned in at tips. Per- 

 fected hind edge with rounded median projection and three or 

 four short broad sharp teeth each side. Projections usually 



8 MU 



