116 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



gill-opening to hypural fan 38-41; predoisal scales 13-16; scales 

 around caudal peduncle 12; maxillary reaching vertical of a point 

 about midway between anterior border of orbit and anterior border 

 of pupil when mouth is tightly closed. (Genus Eury stole.) . . . 



Eurystole eriarcha. 



lb. Anal fin with a deep, scaly basal sheath composed of two rows of 



scales on the basal part of the rays of most or all of the fin ; silvery 



lateral band scarcely or only very slightly constricted on caudal 



peduncle, never constricted to a thin line; scales in lateral series 



58-65 ; predorsal scales 23-28 ; scales around caudal peduncle 16-18 ; 



maxillary not or barely reaching vertical of front edge of orbit 



when mouth is tightly closed. (Genus Nectargcs.) 



2a. Scaly sheath on basal part of anal rays composed of a distal row 



of scarcely or not at all modified scales, large and rounded in 



form, extending along the base of the entire fin, and a proximal 



row of highly modified, veiy oblique scales; lateral silvery band 



very wide, including three complete longitudinal rows of scales 



at a point below first dorsal fin ; head 4.32-4.58 and depth 3.9-4.2 



in standard length; gill-rakers on lower limb of first gill-arch 



15-17. (Subgenus Euryarges.) .... Nectar ges nesiotes. 



2b. Scaly sheath on basal part of anal rays composed of a distal row 



of modified, more or less oblique quadrilateral scales with the 



apexes forming a rounded angle at the postero-inferior corner 



of each scale, and a proximal row of very oblique scales which 



are only partly on the rays, the sheath sometimes absent on the 



posterior third of the fin; lateral silvery band narrower, covering 



not more than two complete scale rows below the first dorsal; 



head 4.63-4.88 and depth 4.2-5.22 in standard length; gill-rakers 



on lower limb 17-20. (Subgenus Nectar ges, s. str.) 



3a. Lateral silvery band below first dorsal covering two complete 



scale rows and a half of another row both above and below; 



distance between caudal base and origin of second dorsal fin 



2.6-3 in standard length; least depth caudal peduncle in its 



length (from base last anal ray to middle hypural fan) 2.31- 



2.74; snout 3.2-3.54 in head ; scales 58-63 in lateral series from 



above gill-opening to end hypural fan; depth 4.22-5.22 in 



standard length Nectarges nepenthe. 



3b. Lateral silvery band below first dorsal covering one complete 

 scale row, over half of another row above, and less than half of 



