540 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



Genus Ampithoe Leach 

 Ampithoe ramondi Audouin 



Ampithoe ramondi Audouin. — J. L. Barnard, 1955, pp. 28-29 (with references). 



Material: Hand station CH-551 (1); Reish stations E-6 (3), 

 E-13 (1), E-20 (2), E-24 (6), E-26 (6), E-44 (1), E-72 (6), E-74 (3), 

 E-82 (8), E-94 (2), BE-103 (2), BE-104 (1), E-116 (1), E-127 

 (10), E-128 (11), E-129 (1), E-143 (5), E-144 (24), E-145 (9), 

 E-171 (14), E-172 (5), E-184 (4). 



Distribution : Pan tropical. 



Genus Cymadusa Savigny 

 Cymadusa brevidactyla (Chevreux) 



Grubia brevidactyla Chevreux, 1907, pp. 416-417; 1908, pp. 517-521, figs. 30-32.— 

 Schellenberg, 1938a, p. 87. 



Material: Bayer station 628 (2). 



Remarks : The single adult is a female, the other specimen a juvenile. 

 The female is distinguishable from females of C. filosa by the very 

 narrow hindlobe of article 5 on gnathopod 2. 



Distribution: Gambler and Tuamotu Archipelagos; Gilbert and 

 Elhce Islands; Nauru; Ifaluk Atoll, Caroline Islands. 



Cymadusa filosa Savigny 



Cymadusa filosa Savigny. — J. L. Barnard, 1955, pp. 29-30, fig. 15 (with refer- 

 ences).— Ruffo, 1959, p. 19. 



Material: Abbott stations 19-E-3 (1), 23-E-2 (1), 42-F-2 (2), 76- 

 H-3 (1), 83-E-l (1), 84-D-l (8), 90-C-4 (2), 91-E-2 (4), 95-Ir^ 

 (2), 112-1-5 (1), 113-H-2 (1), 116-F-3 (1), 123-D-2 (7), 139-C-2 

 (1), 144-F-2 (2), 145-C-3 (5), 177-G-5 (7), 179-184-M-l (11), 192- 

 D-6 (1) ; Bayer station 588 (1) ; Reish stations E-2 (1), E-6 (2), E-15 

 (1), E-25 (5), E-38 (41), E-40 (5), E-41 (1), E^2 (2), E-48 (2), 

 E-50 (2), E-55 (4), ME-57 (1), ME-60 (7), E-75 (4), E-81 (6), E-82 

 (2), E-95 (2), BE-109 (7), BE-114 (6), E-119 (1), E-120 (1), E-128 

 (1), E-129 (4), E-136 (4), E-163 (1), E-171 (4), E-172 (8). 



Remarks: Ruffo (1959) expressed doubt that materials reported by 

 J. L. Barnard (1955) from the Hawaiian Islands are indeed this 

 species because of the poorly setose gnathopods; Barnard's figures of 

 the apparently young male correspond with Shoemaker's (1935, figs. 

 5g, h) figures of the female. Apparently, the fully setose condition 

 is characteristic of aged males and none of these has been seen by me 

 from the tropical Pacific, except those found on floating debris. 



Distribution: Tropical and warm-temperate cosmopolitan. 



