54 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Key to Females of Genus Echthrogaleus 



1. Posterior border of dorsal thoracic plate smooth. Leg 5 concealed in dorsal 



view coleoptratus 



Posterior border of dorsal thoracic plate serrate 2 



2. Leg 5 visible in dorsal view. Dorsal thoracic plate covering not more than 



H genital segment denticulatus 



Leg 5 concealed in dorsal view. Dorsal thoracic plate covering at least % 

 genital segment torpedinis 



Echthrogaleus coleoptratus (Guerin-Meneville, 1837) 



Figures 264-280 



Dinemoura alata Guerin-Meneville, 1837, p. 42. 



Dinemoura coleoptrata Guerin-Meneville, 1837, p. 42. 



Dinemoura affinis Milne-Edwards, 1840, p. 465. 



Dinematura braccata Dana, 1852, p. 60. 



Echthrogaleus coleoptratus Steenstrup and Liitken, 1861, p. 380. — Olsson, 1868, 

 p. 20.— Norman, 1868, p. 301.— Rathbun, 1884, p. 488.— Brian, 1899, p. 4; 

 1902, p. 8; 1906, p. 53; 1908, p. 4; 1912, p. 12; 1914b, p. 148; 1944, p. 202.— 

 Bassett-Smith, 1899, p. 464.— Scott, T., 1900, p. 156; 1901, p. 125; 1902, 

 p. 292.— Scott, T., and Scott, A., 1913, p. 89.— Norman and Scott, T., 1906, 

 p. 214.— Wilson, 1907, p. 367; 1908, p. 452; 1920, p. 12; 1922, p. 5; 1923, 

 p. 13; 1932, p. 427.— Norman and Brady, 1910, p. 404.— Stebbing, 1910, 

 p. 559.— Hansen, 1923, p. 33.— Marukawa, 1925, p. 1242; 1947, p. 926.— 

 Yamaguti, 1936, p. 7; 1963, p. 119. — Oorde and Schuurmans Stekhoven, 1936, 

 p. 139.— Rose and Vaissiere, 1953, p. 86.— Shiino, 1954, p. 291; 1957, p. 364.— 

 Delamare-Debouteville and Nunes-Ruivo, 1954, p. 204. — Barnard, 1955, p. 

 264.— Capart, 1959, p. 97.— Stuardo and Fagetti, 1961, p. 58. — Heegaard, 

 1962, p. 177. 



Echthrogaleus braccatus. — Heller, 1868, p. 197. — Thomson, 1889, p. 361. — Norman 

 and Scott, 1906, p. 213.— Wilson, 1907, p. 366. 



Nogagus lutkenii Norman, 1868, p. 300. 



Echthrogaleus perspicax Olsson, 1868, p. 18. — Wilson, 1907, p. 457. 



Echthrogaleus lutkenii. — Norman and Scott, 1906, p. 213. — Scott, T., and Scott, 

 A., 1913, p. 90.— Oorde and Schuurmans Stekhoven, 1936, p. 139. 



Echthrogaleus affinis. — Brady, 1883, p. 133. — Bassett-Smith, 1899, p. 465. — 

 Wilson, 1907, p. 363. 



Specimens studied. — Twenty-six collections from Prionace glaiica 

 from the western North Atlantic (35°-45°N, 20°-80°W). A single 

 collection from Lamna ditropis Hubbs and Fallett sent to me by 

 Dr. P. Gilbert from the North Pacific. Four collections from Prionace 

 glauca from the Indian Ocean (42°23'S, 74°56'E) and 2 collections 

 from Lamna nasus (Bonnaterre) at the same locality. 



This copepod has been extensively collected and reported in the 

 literatm'e. The female has been well described and figm-ed (most 

 recently by Shiino, 1954) ; however, the male is poorly known and 

 will be dealt with here in more detail. 



Female. — Body form as in figure 268. Total length 9.7 mm (based 

 on an average of 10 specimens). Greatest width 4.8 mm. Dorsal 



