NO. 3574 COPEPOD CRUSTACEANS — LEWIS 145 



Caligus ampUfurcus Pearse, 1952b, p. 199, figs. 29-35.— Shiino, 1959d, p. 280, 



figs. 7-8.— Yamaguti, 1963, p. 49. 

 Caligus amplifurcatus Pearse, 1952b, p. 200 (figure title) (lapsus). 

 Caligus lucidus Heegaard, 1962, p. 158, figs. 54-61. 



Distribution and hosts. — 4 host records: 



locality hosts references 



Gulf of Aden Caranx melamphigus Bassett-Smith, 1898b 



Australia Cantherhines axjraud Heegaard, 1962 



Eastern Pacific Caranx lugubrius Shiino, 1959 



Gulf of Mexico Caranx crysos Pearse, 1952b 



Material.— Twenty-six females and 3 males (USNM 112915) 

 from the external surface of Caranx melampygus Cuvier and Valen- 

 ciennes, captured in fishtrap by Samuel Kaolulo between Diamond 

 Head and Koko Head, Oahu, Hawaii. One female (USNM 112916) 

 from the external surface of C. melampygus Cuvier and Valenciennes, 

 captured in fishtrap by Samuel Kaolulo between Diamond Head 

 and Koko Head, Oahu, Hawaii. Four females (one damaged) and 

 1 male (retained by author) from the external surface of C. melampygus 

 Cuvier and Valenciennes, captured in fishtrap by Samuel Kaolulo 

 between Diamond Head and Koko Head, Oahu, Hawaii. 



Measurements. — (In mm) 28 females and 4 males: 



female male 



Description. — Female cephalothorax (fig. 546) ovoid, consisting 

 of cephalon and first 4 thoracic segments. Greatest length of frontal 

 region approximately one-tenth that of entire cephalothorax, with 

 fine membrane along anterior margin, bearing pair of ovoid lunules 

 (fig. 55a) extending posteriorly, on ventral surface, to junction of 

 frontal region and rest of cephalothorax. Lateral margin of cephalo- 

 thorax slightly kregular, with narrow membrane extending laterally 

 and second membrane extending medially, on ventral surface. Pos- 

 terior-lateral dorsal surface of cephalothorax with small, posteriorly 

 facing depression. Posterior sinus (fig. 54c) irregularly U-shaped, 

 with thickened membrane-like projection along outer margin. Pos- 

 terior median cephalothoracic surface projecting well past lateral 

 surfaces, posterior end of surface with short, lappet-like projections 

 laterally. Major dorsal cephalothoracic grooves incomplete, partially 



226-321—67 10 



