io8 REPORT OF NEW JERSEY STATE MUSEUM. 



larged nearly twice length of carapace, elliptical, about one- 

 fourth long'er than wide and sides very evenly curved. Genital 

 segment covered by pair of dorsal plates with softened edges 

 which project far beyond lateral and posterior edges of segment. 

 These soft edges rolled over ventrally into large scrolls which 

 completely cover sides and hind end of segment and lap Cjuite a 

 distance on to ventral surface, completely concealing abdomen, 

 anaJ laminfe and egg-strings in dorsal view. Posterior sinus 

 between these plates sharply triangular, about one-fourth entire 

 length of plates. Abdomen semi-elliptical, fully as large or 

 larger than that portion of genital segment preceding. Its ven- 

 tral surface produced into large lobe or lamina on either side, 

 which extends outward laterally beneath turned-over edge of 

 dorsal plates of genital segment. When eg'g-strings absent 

 lateral and anterior edges of these laminae turned upward 

 into scrolls, similar to those formed by dorsal plates of genital 

 segment and inside of them. Lateral margin also caught 

 inward in large fold on either side about one-fourth distance 

 from its anterior end. This gives ventral aspect of abdomen pe- 

 culiar T-shape, upright portion more than twice width of arms. 

 When egg-strings extrude these folds and scrolls along lateral 

 edges are straightened out and each lamina rests flatly upon 

 ventral surface of coiled egg-strings, completely concealing them 

 in ventral view. Scrolls along anterior edge never entirely 

 straightened, but lamina on either side curls up over eggs at that 

 point and holds them securely in place. Anal laminae small, 

 orliicular, attached close to' anus either side, and armed with 

 short stout spines, without plumose setae. 



First antennae two-jointed, l>asal joint much longer, and each 

 joint armed with a few short spines. Second antennae large, 

 powerful, principal organs of prehension, three-jointed, terminal 

 joint strong sickle-shaped claw, which is buried in the host's flesh. 

 Terminal joint of first maxillipeds much shorter and more slender 

 than basal, terminal claw nearly long as joint itself and only 

 slightly curved, accessory claw much shorter, while both claws 

 with serrate edges. Second maxillipeds stout, not swollen as in 

 Pandarince. curved terminal claw nearly long as basal joint and 



