THE CRUSTACEA OF NEW JERSEY. 103 



Male. — Carapace similar to female, relatively shorter and 

 wider. Thorax se^'ments similar. Genital segment much 

 smaller, only two-thirds size of carapace, its dorsal plate fused 

 along- mid-line with wide and shallow^ posterior sinus through 

 which abdomen shows. Latter small and subquadrangular. 

 Anal laminae narrow and oblong. Appendages like in female. 

 Second antennji? and second maxillipeds longer and stouter than 

 in femlale. Third legs like first two pairs, with two-jointed 

 rami, and fourth pair one-jointed and enlarged as much as in 

 female. 



i 

 Orthagoriscicola muricata (Kroyer). 



Plate 26. 



Cecrops (Lceniargus) muricatus Kroyer, Naturh. Ticlssk., I, 1837, p. 487, PI. 



5, figs. a-e. Denmark (on Mola mola). 

 Lcrmargus muricatus Leidy, Proc. Acad. Nat. Sci. Phila., 1890, p. 282. Beach 



Haven, New Jersey (on Mola mola). 

 Orthagoriscicola muricata Wilson, Proc. U. S. Nat. Mus., XXXIII, 1908. p. 



473, Pis. 40-41. About 120 miles off Wood's Holl, Mass. 



Description of fcuuile. — ^Carapace trapezoidal or wedge- 

 shaped, much narrowed anteriorly, with well rounded posterior 

 lobes and very shallow sinus. Frontal plates fused with cara- 

 pace. Eyes invisible in adults. Lateral carapace margins set 

 with fine conical teeth, and grooves on dorsal surface indistinct 

 but separating lateral area on either side, which again divided 

 into ver\' small cephalic and much larger thoracic portion. En- 

 tire dorsal surface sparsely covered with spines, which coarser 

 and more prominent on ridges alongside grooves. Second, 

 third and fourth thorax segments free, first two with pair of 

 narrow spine-like projections in place of lateral lobes, all three 

 of same wddth. Third segment without dorsal plates. Fourth 

 pair, whose combined area greater than that of carapace, and 

 separated by deep posterior sinus, often trifle enlarged at it.? 

 base. Genital segment transxersely elliptical, large as carapace, 

 one-half wider than long, covered with pair of huge dorsal 

 plates which overlap each other along mid-line and extend back 

 lieyoiid tip of abdomen. Posterior ci.nd postero-lateral borders 



