100 REPORT OF NEW JERSEY STATE MUSEUM. 



nearly circular in outline and bordered by acuminate spines 

 similar to those on carapace, but not quite as large. Sinus- 

 between plates wide, well rounded at base, but farther back its 

 sides approach until in actual contact. Combined plates of fourth 

 and genital segments about same size as carapace and inversely 

 same shape. As abdomen is hidden this produces a regular 

 elliptical outline, broken across short diameter by waist between 

 carapace and fourth segment. Joint between third and fourth 

 segments seems to be only one really flexible, and anterior half 

 of body frequently folded over ventrally against posterior half. 

 Dorsal surface of genital segment covered by pair of plates 

 similar to those on fourth segment and finely serrate around 

 edges. Posterior sinus between these plates deeply cut, similar 

 to that between fourth segment plates. Abdomen of medium 

 size, considerably wider than long, unsegmented, attached to 

 ventral surface of genital segment just in front of base of sinus, 

 between dorsal plates of latter. Its own hind margin slightly 

 reentrant on either side where lamina is attached, and these 

 laminae small, foliaceous, and furnished with four short spines. 

 Laminae vary in length, but usually project somewhat behind 

 genital segment. Egg-strings narrow, two and one-half to three 

 times long as whole body. Eggs small, similar to those in 

 Pandarince. 



First antennae large, appressed close to edge of carapace, two 

 joints subequal, basal twice diameter of terminal, and both well 

 armed with setse. Second antennae large, three- jointed, end in 

 stout curved claw with an accessory spine on its inner edge. 

 When antennae tiirn forward these claws project beyond outer 

 carapace edge, prehensile and with second maxillipeds are driven 

 deeply into the flesh of the host. No first maxillae. Second 

 pair close beside mouth-tube, about one-third its length, simple 

 and end in short blunt spine directed outward. Mouth-tube very 

 long, conical, base wide, but about level of tips of second maxillae 

 narrows rapidly to slender tip. Mouth-opening terminal, fringed 

 with long hairs, through which mandible tips mav be seen. 

 Latter slender, toothed some distance along inner edges at tip, 

 and wide blunt teeth different from those in Pandariucu. Fir>t 



