ISOPODS OF NORTH AMERICA. 



417 



"Inhabits South Carolina. 



"Cabinet of the Academy. 



"Body oblong, not distinctly attenuated before; segments subequal, 

 entire; head at base equal to the preceding segment, a sinus each side 

 in the middle; eyes prominent, black; antennae, exteriors as long as 

 the body in one sex; in the other, longer, interiors nearly attaining 

 the tip of the second joint; hands with a prominent angle on the mid- 

 dle of the inferior edge, thumb closing on and surpassing the angle, 

 shorter than the hand; nails somewhat bifid at tip; terminal caudal 

 segment longitudinally subovate, stj^les elongated cylindrical, equal 

 to the terminal segment of the body, laciniae very unequal, inner one 

 nearly thrice the length of the outer one, truncate at tip; color, pale 

 brown with a doable dorsal brown line, united at the tip of the tail, a 

 brown line or two each side of the tail. Length nearly one-fourth of 

 an inch. 



"This animal is not an uncommon inhabitant of the swamps in the 

 forests of South Carolina. It might be referred to the genus Janira 

 of Doctor Leach. '' SAY." 



MANCASELLUS DANIELSI Richardson. 



i . -j 



Mancasellm danielsi RICHARDSON, Proc. U. S. Nat. Mus., XXV, 1902, pp. 505-507. 



Locality. Lily Lake, La Porte, Indiana. 



Body broadly oval, with lateral parts of 

 segments widely expanded. Head broader 

 posteriorly than anteriorly, the posterior part 

 being as wide as the first thoracic segment. 

 Lateral margins have a deep and wide incision 

 which separates the narrower anterior lobes 

 from the widel} T expanded posterior lobes. 

 The eyes are opposite these incisions. The 

 frontal margin is produced in a small median 

 point, on either side of which is a shallow 

 depression, followed by another point, in turn 

 succeeded by a slight depression. The anten- 

 nulae are short, reaching only to the extremity 

 of the fourth joint of the peduncle of the 

 antennae; the fiagellum consists of eight joints. 

 The antennae are very long, extending nearly 

 the entire length of the body. The mandible 

 is without a palp. 



The thoracic segments are subequal in length, 

 are widely expanded, with lateral margins entire. 



FIG. 468. MANCASELLUS UANI- 



ELSI. X 3|. 



The lateral parts 

 The caudal segment is narrower posteriori}' than anteriorly, with 



Jour. Acad. Nat. Sci. Phila., I, 1818, p. 428. 

 27 



