NO. 3574 COPEPOD CRUSTACEANS — LEWIS 101 



characteristic is the described "sickle-shaped claw" on the first seg- 

 ment of the exopodite of the thu'd thoracic leg in M. carangis; this 

 claw is bifid in M. lobodes. 



Caligus MuUer, 1785 



Diagnosis. — Cephalothorax consisting of cephalon and first 4 

 thoracic segments; frontal region distinct, with Imiules. Free fom-th 

 pedigerous segment without alae, sometimes with small, lappet-like 

 lateral projections of tergum extendmg over proximal sm-face of fom'th 

 thoracic leg. Genital segment of variable shape, infrequently with 

 extensions of posterior lateral surface, without elongate, heavily 

 sclerotized fifth leg projections. Abdomen 1-4 segmented, of variable 

 length but not longer than combined lengths of cephalothorax, free 

 fom-th pedigerous segment and genital segment. Antennule 2-seg- 

 mented; antenna 3-segmented, with clawlike terminal process, vari- 

 ously modified in male. Mandible rodlike, distal end curved inward, 

 slightly flattened, distal inner surface with 12 denticulations, Post- 

 antennal process consisting of 3 nodules, each with several hau'like 

 processes, usually with spinelike projection. Postoral process spine- 

 like, simple or with small accessory spine. MaxUlule nodular, with 

 hairlike or setular projections; maxilla 2-segmented, terminated by 

 2 saber-shaped projections. Maxilliped 2-segmented, with claw- 

 like terminal process and setule-like accessory process. Sternal furca 

 present. Thoracic legs I-III biramous although endopodite of first 

 reduced; fourth thoracic legs uniramous. 



Caligus coryphaenae Steenstrup and Liitken 



Figures 37-39 



ICaligus scutaius Milne-Edwards, 1840, p. 453. 



Caligus coryphaenae Steenstrup and Liitken, 1861, p. 360, pi. 4, fig. 7. — Richiardi, 

 1880, p. 148.— Valle, 1880, p. 58.— Cams, 1885, p. 358.— Bassett-Smith, 1899, 

 p. 451.— Brian, 1899a, p. 4.— Wilson, 1905b, p. 556, 559 (key).— Brian, 

 1908, p. 2; 1912, p. 7.— Wilson, 1923, p. 5; 1937, p. 424.— Heegaard, 1949, 

 p. 241, figs. 6-10.— Pearse, 1952a, p. 15.— Capart 1959, p. 81, fig. 14a-d.— 

 Shiino, 1959b, p. 2, figs. 1-2; 1959d, p. 294, fig. 12.— Kurian, 1961, p. 68, 

 figs. 16-24.— Nunes-Ruivo, 1962a, p. 70.— Pillai, 1962b, p. 513, figs. 1, 2.— 

 Shiino, 1963a, p. 336, fig. 1.— Yamaguti, 1963, p. 51, pi. 59, fig. 3. 



Caligus bengoensis Scott, 1894, p. 130, pi. 14, fig. 19. 



Caligus aliuncus Wilson, 1905b, p. 576, pi. 9; 1935b, p. 330.— Bonnet, 1948, 

 p. 7. — Causey, 1953b, p. 8. 



Caligus elongatus Heegaard, 1943b, p. 11, figs. 21-31. 



Caligus iesserifer Shiino, 1952, p. 89, fig. 5. 



Not Caligus coryphaenae. — Brian, 1935, p. 51, figs. 19, 20. — Yamaguti, 1936a, 

 p. 5, pi. 4, figs. 40-54.— Barnard, 1955, p. 246, figs. 8a-d. 



