524 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



of the last two or three thoracic segments is roughened by longitu- 

 dinal rugae, which are most marked on the adjacent margins of the 

 segments. These rugse are neither so conspicuous nor so regularly 

 disposed as in the case of the allied Pal&gyge borrei, described by 



FIG. 569. PSEUDIONE GIAKDI (AFTER CALMAN). O, DORSAL VIEW OF FEMALE. 6, EMBRYO. C, VEN- 

 TRAL VIEW OF MALE. d, MAXILLIPED. 6, ABDOMEN. /, UNDER SURFACE OF HEAD. </, FIRST 

 INCUBATORY LAMELLA WITH PEREIOPOD. h, SECOND PEREIOPOD. i, MOUTH PARTS. 



Giard and Bonnier (Bull. Scient. Fr. et Belg., XIX, 1888, p. 68.) 

 The anterior margin of the head is bordered by a narrow membranous 

 expansion (limbe anterieur, G. & B.), which shows a distinct notch and 

 several fainter undulations on each side of the middle line. No trace 



