THE CRUSTACEA OF NEW JERSEY. 99 



in front of carapace. Other appendages like in female, except on 

 all claws and spines longer and sharper. 



Philorthragoriscus serratus (Kroyer). 

 Plate 25. 



Dinematura serrata Kroyer, Naturh. Tidssk.. (3) 11, 1863, p. 250, PL 8, figs. 



4a-i. Locality ? (host?). 

 Leidy, Proc. Acad. Nat. Sci. Phila., 1890, p. 282. Beach Haven, New 



Jersey (on Mola viola). 

 Philorthragoriscus serratus Wilson, Proc. U. S. Nat. Mus., XXXIII, igo8, 



p. 479, Pis. 42-43. About 120 miles off Wood's Holl, Mass. 



Description of female. — Carapace well rounded, about one- 

 sixth wider than long, with large acuminate teeth along lateral 

 and posterior edges. Frontal plates wide, fairly distinct, but 

 still fused with carapace, and smooth, slightly curved frontal 

 margin with small incision at center. Dorsal surface of carapace 

 with well-defined grooves marking it ofif into similar areas as in 

 Pandarincu. Two longitudinal grooves strongly concave toward 

 each other, like parenthesis marks, space between being nearly 

 two-thirds of entire width. Lateral areas outside these grooves 

 wider posteriorly, prolonged backward on either side in large 

 lobe extending nearly to anterior margin of dorsal plates of 

 fourth thorax segment. Each of these lateral areas divided by 

 transverse groove which starts from deep sinus in lateral margin 

 curving inward and backward to longitudinal groove. Posterior 

 or thoracic portion of area thus shorter but wider than anterior 

 portion, with somewhat appearance of lateral plate attached to 

 hind portion of carapace. Second and third thorax segments 

 fused together and with single pair of lateral plates, one on either 

 side beneath posterior carapace lobe and nearly concealed by it. 

 Fourth thorax segment considerably narrower than second and 

 third, carries pair of large dorsal plates extending outward on 

 either side to level with lateral margins of carapace and back- 

 ward until overlapping half genital segment. Two plates en- 

 tirely fused anteriorly for about one-fourth their length, and 

 combined anterior margin nearly p^erfect arc of large circle 

 which terminates at either end in short sharp spine. Each plate 



