PROCEEDINGS OF THE ACADEMY OF 



[Jan., 



elongate, pointed, free. Triangular nasal cavity about long as 

 pupil. Interorbital and top of head with rather shallow con- 

 cave median depression, not extending back to occiput. Few 

 ridges or striae on bones of head above. Opercle width about 

 wide as cheek. 



Fig. 1. — Strongylura peruana. 



Gill-opening extends forward to front pupil edge. No rakers. 

 Gill-filaments 1| in eye. Isthmus long narrow frenum. 



Scales small, uniform, each with about 18 to 20, coarse complete 

 circuli. Maxillary, sides of mandible basally, opercles, and most 

 of head covered with fine scales. Cheek with about 30 rows of 

 scales behind eye to preopercle ridge. Front of dorsal and anal 

 basally with small scales. Lateral line with short branch to 

 pectoral base, and behind extends up midway along caudal pe- 

 duncle side on keel to caudal base. 



Dorsal inserted about last fourth between hind eye edge and 

 caudal base, front rays elevated as lobe. Anal similar, inserted 

 little before dorsal. Caudal broad, hind edge (damaged) emar- 

 ginate or with lower lobe slightly longer. Pectoral inserted little 

 high, pointed, and uppermost or simple ray enlarged. Ventral 

 rather obtuse, inserted about midway betw^een hind preopercle 

 edge and caudal base. Vent about half an eye-diameter before 

 anal. 



Color in alcohol dull, brownish generally, sides and below paler 

 or with brassy to silvery reflections. Narrow brassy-leaden streak 



