ii8 REPORT OF NEW JERSEY STATE MUSEUM. 



placed transversely in a row, of which little smaller central one 

 slightly posterior. Portion of dorsal plates visible on second 

 thoracic segment inclined out at an angle of forty-five degrees 

 to body axis, their contour elliptical, and longer diameter nearly 

 twice that of shorter diameter. Outer edges of these plates truly 

 extends forward to reniform pads of second maxillipeds, and 

 when removed from body appear spindle-shaped, each end 

 pointed, about twice as long as wide and joined nearly at center 

 of inner margin, leaving both ends free. Wide space between 

 bases of these plates and behind posterior edge of carapace left 

 unprotected or with only small central plate. Dorsal plates of 

 third thorax segment smaller than first pair, elliptical, nearly 

 horizontal or only but slightly inclined, so their tips meet and 

 often overlap in median line. Dorsal plates of third pair some- 

 what enlarged, extend across entire body width, circular, inner 

 edges overlap on median line and their hind edges reach short 

 space over genital segment. Hind edges of first and third pairs 

 of plates scalloped, points ending in short sharp teeth. Edges of 

 second pair of plates smooth. Genital segment about equals 

 carapace in size, evenly rounded in front, lateral edges convex, 

 and hind edge emarginated oblicjuely each side, forming broad, 

 deep median sinus. Outer hind edge of genital segment ends 

 in short, sharp spine each side. Between this and sinus posterior 

 edge of body sigmoid in form. Abdomen small, plump, barrel- 

 shaped, little longer than wide, one-jointed, and entirely con- 

 cealed below genital segment. Anal laminae short, triangular, 

 with minute irregular spines. 



First antnnse small, two-jointed, basal joint heavily, and 

 terminal joint lightly, furnished with setae. Basal joint also 

 much wider than terminal and twice as long, its tip reaching 

 well beyond edge of frontal plate. Second antennae small, 

 weak, terminal claw long as rest of appendage, slender and 

 not very strongly curved. Sucking-pads of first pair ovate, 

 and circular second pair much smaller at the base of sec- 

 ond antennae on ventral surface of carapace. Mouth tube 

 and mandibles as usual. Second maxillae lamellar, each tipped 

 with long narrow spine. First maxillipeds of usual pattern, 

 terminal claws rather stout, and outer considerably longer than 



