COPEPOD CRUSTACEANS — LEWIS 



139 



p. 558.— Guiart, 1913, p. 7.— Scott and Scott, 1913, p. 57, pi. 7, tigs. 2,3; 

 pi. 9, figs. 1-5; pi. 71, fig. 14.— Scott, 1929, p. 89.— Wilson, 1932, p. 406, 

 fig. 254.— Heegaard, 1943b, p. 5.— Causey, 1953a, p. 5; 1953b, p. 10; 1955, 

 p. 4. — Nunes-Ruivo, 1956, p. 5, pi. 1, fig. a. — Barnard, 1955, p. 245. — 

 Causey, 1960, p. 329.— Hewitt, 1963, p. 78, fig. 6. 



Caligus scomberi Bassett-Smith, 1896b, p. 11, pi. 3, fig. 2; 1899, p. 450. 



Caligus scombri Scott T., 1901, p. 148, pi. 5, fig. 9-10.— Scott A., 1906, p. 196, 

 pi. 6.— Guiart, 1913, p. 6. 



Distribution and hosts. — -12 host records: 



locality 

 North Atlantic 



East coast of North 



Atlantic 

 South Atlantic 



Gulf of Mexico 



New Zealand 

 Mediterranean 



hosts 

 Pelamys sarda 

 Scomber scombrus 

 Unknown 



Unknown 



Sarda sarda 

 Pogonias cromis 

 Scomberomorus cavalla 

 Sarda sarda 

 Thyrsites atun 

 Scomber scomber 

 Pelamys sarda 

 Unknown 



references 

 Kr0yer, 1863 

 Scott and Scott, 1913 

 Wilson, 1905b 



Brady, 1910 

 Stebbing, 1910 

 Nunes-Ruivo, 1956 



Causey, 1953a 

 Causey, 1953b 

 Hewitt, 1963 



Richiardi, 1880 

 Guiart, 1913 



Material.— One female (USNM 112914) from the gill cavity of 

 Euthynnus yaito (Jordan and Evermann) captured at French Frigate 

 Shoals (USFWS, HMS cruise 39, station 32). 



Measurements. — (In mm) 1 female: 



Total length, excluding caudal setae 4. 05 



Length of cephalothorax, including frontal region 1. 38 



Width of cephalothorax 1- 20 



Length of genital segment 1. 18 



Width of genital segment 1- 10 



Length of abdomen 1- 45 



Length of caudal rami 0. 17 

 Length of egg strings (female nonovigerous) 



Description of female. — Cephalothorax (fig. 52a) ovoid, con- 

 sisting of cephalon and first 4 thoracic segments. Frontal region 

 narrow, middle of anterior sm-face distinctly indented, margin with 

 fine membrane. Lunules (fig. 52/) large but filmy, extending 

 posteriorly, on ventral surface, past junction of frontal region and 

 remaining cephalothorax. Lateral margin of cephalothorax slightly 

 kregular, bearing fine membrane extending laterally and second 

 extending medially on ventral surface. Posterior lateral cephalo- 

 thoracic surface with small concavity. Posterior sinus (fig. 526) 

 narrow, constricted at opening, with fine membrane along outer 

 surface. Posterior median cephalothoracic surface extending past 



