528 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



abdominal segments on the underside. The posterior margins of the 

 abdominal segments and the anterior as well as the posterior margins 

 of the last two thoracic segments are, on the ventral side, produced in 

 small round lamellae or knots. There are five pairs of incubatory 

 lamellae, the first pair of which have the distal portion produced on the 

 posterior margin in a small lobe. 



All the seven pairs of legs are prehensile, and have a low rounded 

 carina on the basis. 



FIG. 570. PSEUDIONE GALACANTHwE (AFTER HANSEN). a, FIRST LEG WITH INCUBATORY LAMELLA. 

 &, SIXTH LEG OF FEMALE. C, HEAD OF SMALLER MALE. d, DORSAL VIEW OF MALE. 6, HEAD OF 



FEMALE (VENTRAL VIEW). /, DORSAL VIEW OF FEMALE, g, VENTRAL VIEW OF FEMALE, h, FIRST 



LEG OF MALE, i, SEVENTH LEG OF MALE. 



The male is narrow, elongate, 4.8 mm. long and about 1.2-1.4 mm. 

 wide. Eyes small, distinct. Anterior margin of head rounded. The 

 first pair of antennae are composed of "three" articles. The second 

 pair of antennae are composed of " five " articles. All seven segments 

 of the thorax are distinct. The seven pairs of legs are prehensile. 

 The six segments of the abdomen are distinct. The sixth or terminal 

 segment is small, with the posterior margin truncate. There are no 

 uropoda. The pleopoda are five pairs of small, simple, sac-like bodies, 

 almost rudimentary, a pair attached to each of the first five abdominal 

 segments. 



