FISHES OF SINALOA. 467 



154. Larimus argenteus (Gill). 



One large specimen obtained; also found in the Gulf 

 of California and southward on sandy shores to Panama. 



155. Larimus breviceps Cuvier & Valenciennes. 

 Specimens of this species were obtained by Dr. Gilbert 



at Mazatlan, Punta Arenas and Panama. None were 

 seen by us. 



156. Corvula macrops (Steindachner). Vacuocua. 

 One fine specimen from the Astillero at Mazatlan. 

 Head 2)4', depth 3; dorsal XI, I, 25; anal II, 9; eye 



3^ in head; snout 4%!; maxillary 2%; longest dorsal 

 spine i^ ; longest dorsal ray 2^ ; second anal spine 2l^ ; 

 ventrals 1%; pectoral i|; caudal fin i^^. 



Body oblong, moderately compressed, not much ele- 

 vated; dorsal outline uniform from tip of snout to caudal 

 peduncle; ventral outline rounded from chin to breast, 

 then straight to anal spine, then slanting obliquely upward 

 to caudal peduncle. ' 



Snout blunt, shorter than large eye ; upper jaw slightly 

 projecting, teeth small and sharp, in one or two irregular 

 series in lower jaw, in several series in upper jaw, the 

 outer row slightly enlarged; maxillary extending to pos- 

 terior edge of pupil; chin with four large pores; edge of 

 preopercle covered with skin, which is serrated on the 

 edge. 



Gill-rakers slender, 9+13; scales ctenoid on the body, 

 cycloid on the head; scales 8-56-1 1. 



Spinous dorsal a little higher than soft dorsal ; first dorsal 

 spine ver^r short, second about 5 times longer, third twice 

 as long as second, third, fourth, fifth and sixth subequal, 

 the others rapidly shorter; first anal spine very small, the 

 second many times longer and stouter, but shorter than 

 soft rays; ventrals inserted behind pectorals and reach- 

 ing beyond them; caudal truncate. 



