

18 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



pinkish and golden iridescence over the body. There are no stripes on the 

 body. The pectoral fin is equal to or slightly greater than the length of the 

 head. 



Trichiuridae Cutlassfishes 



Trichiurus lepturus Linnaeus 



One from Balboa, Canal Zone, February 22, 1932. Length 422 mm. 

 Gift from Captain Fred Whalen. 



Carangidae Cavallas and Pampanos 

 Decapterus hypodus Gill 



One from Post Office Bay, Charles Island, Galapagos, January 2, 

 1932. Length 405 mm. These have a single detached finlet behind the 

 dorsal and the anal fin, 30 scutes on the lateral line, and a distinct oper- 

 cular spot. This species is known locally as Mackerel Scad. 



Trachurops crumenophthabna (Bloch) 



Twenty-seven from Post Office Bay, Charles Island, Galapagos, Jan- 

 uary 2, 1932. Length 150-189 mm. Five from Acapulco, Mexico, Decem- 

 ber 15, 1931. Length 175-208 mm. Three from La Plata Island, Ecua- 

 dor, Febi-uary 10, 1934. Length 85-105 mm. This Big-eyed Scad is easily 

 identified by the deep cross furrow at the isthmus and by the fleshy pro- 

 jection into the gill cavity. They were so abundant at Charles Island, 

 Galapagos, that half the catch had to be turned out of the net before it 

 could be drawn out of the water, 



Hemicaranx atrimanus (Jordan and Gilbert) 



One from Panama Market, December 23, 1931. Length 178 mm. 

 P aratr actus caballus (Gilnther) 



One from Tenacatita, Mexico, December 10, 1931. Length 229 mm. 

 Three from Acapulco, Mexico, December 15, 1931, Length 188-227 mm. 

 One from Tower Island, Galapagos, January 20, 1932. Length 238 mm. 

 One from Corinto, Nicaragua, Februaiy 9, 1932. Length 307 mm. This 

 Common Green Jack has the breast fully scaled, pectoral fins much longer 

 than the head, dorsal VIII-I, 24; anal II-I, 21 ; scutes 41-44. 



Xurel marginatus (Gill) 



Seven from Mazatlan, Mexico, December 7, 1931. Length 100-198 

 mm. One from Bahia Honda, Panama, December 21, 1931. Length 228 

 mm. One from Panama Market, December 24, 1931. Length 167 mm. 



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