56 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



The male shows the modified endopod of leg 3 placing this copepod 

 in group II. 



Echthrogaleus denticulatus Smith, 1874 



Figures 281-290 



Echthrogaleus denticulatus Smith, 1874, p. 282. — Rathbun, 1884, p. 488. — Wilson, 

 1907, p. 369; 1932, p. 428.— Shiino, 1954, p. 297; 1959b, p. 352. 



Dinematura neozealanica Thomson, 1889, p. 359. — Bassett-Smith, 1899, p. 464. — 

 Wilson, 1907, p. 363. 



Pandarus armatus Thomson, 1889, p. 363. [Nogagus male.] 



Specimens studied. — A single large collection from Alopias 

 pelagicus Nakamiira from Majimga, Madagascar. Three collections 

 from Alopias vulpinus from the Indian Ocean Cl6°13'N, 63°29'E; 

 9°24'N, 54°58'E; 7°17'N, 55°00'E). A single collection from 

 Eulamia floridanus from the Indian Ocean (14°36'N, 55°23'E), 

 Two collections from Alopias vulpinus from the Pacific Ocean (7°47'N, 

 102°37'W; 11°15'N, 113°26'W). 



Female. — Body form as in figure 281. Total length 7.8 mm 

 (based on an average of 5 specimens). Greatest width 4.3 mm 

 (measured at the widest part of cephalon). The female of this 

 species has been re(;ently redescribed and figm^ed by Shiino (1954) 

 and a complete description will not be repeated here. Oral area of 

 usual type, adhesion pads present. Cephalic appendages as shown 

 by Shiino except terminal claw of second maxilla (fig, 282) is indis- 

 tinctly subdivided. 



Legs 1-4 biramose with spine and setal formula as follows: 



Leg 5 (fig. 283) a long process projecting beyond distal corners of 

 genital segment, bearing a stout terminal spine and 2 subterminal 

 setae. Leg 6 (fig. 284) located at junction of abdomen and genital 

 segment and composed of a bilobed process. Leg 6 covered by 

 abdomen in ventral view. 



Egg strings long and straight. 



Color in life cream, no pigmentation. 



Male. — Body as in figure 285. Total length 5.2 mm (based on 

 an average of 2 specimens). Greatest width 2.8 mm (measured at 

 widest point of cephalon). Frontal plate separate. Cephalon 

 rounded, somewhat wider than long. No dorsal thoracic plates. 

 Genital segment (fig. 286) with posterior corners produced only 

 slightly. Two patches of spinules on ventral surface of segment. 

 Genital segment longer than wide (1.2 by 1.0 mm). Abdomen 2- 



