550 NEW FISHES FROM PACIFIC COAST GILBERT, 



the whole eye being visible through it iu alcoholic specimens. The 

 adipose mass lying behind the eye is also less developed, and encroaches 

 but little on the opercle. 



Eye large, equaling or slightly exceeding the length of the snout, 

 3f to 4 in the head, 1| in interorbital width. Suborbital very wide, as 

 in Mugil trichodon. 



Scales moderate, 20 iu front of dorsal, 37 or 38 in the lateral line, 

 11 in an oblique series from vent to base of dorsal. Accessory scale 

 on each side of spinous dorsal usually longer than the base of the fin. 

 Axillary scale exceedingly thin and membranous. Soft portions of 

 all the vertical fins scaled to tip; basal portions of the pectorals and 

 ventrals also scaled. 



Pectorals pointed, slightly falcate, as long as head behind front of 

 pupil reaching tenth or eleventh scale on sides, failing to reach front 

 of spinous dorsal by about one-fifth its own length. 



Spinous dorsal lower than soft dorsal. Both soft dorsal and anal 

 strongly falcate, the last rays much higher than middle rays, the ante- 

 rior rays when depressed nearly reaching tips of last rays. Soft dorsal 

 inserted over fourth or fifth ray of anal. Caudal longer than head, the 

 lobes long and pointed. 



Head 3§ to 3| in length ; depth 4. D. IV-I, 8; A. Ill, 9. Lat. 1. 37. 



Plain grayish above, silvery on sides and below, without stripes or 

 other markings. Ventrals unmarked, the other fins slightly dusky, the 

 caudal with a distinct black margin. 



Very abundant at Clarion Island, of the Revillagigedo Group ; not 

 obtained elsewhere. 



14. Diplectrum sciurus sp. nov. 



Most closely resembling D. macropoma^ but differing strongly from 

 this and all other species of the genus m the very numerous, long and 

 slender gill rakers, which are two thirds the diameter of the eye, even 

 in young specimens; they are about 25 in number on the horizontal 

 limb of the outer arch, instead of 12 as in radiale and macropoma, or 9 

 as iuformosmn. 



A single rather wide cluster of spines at angle of preopercle, much as 

 in niacroponia, the width of the cluster 4^ to 5 in head, in specimens 5 

 inches* long. 



Scales on cheeks small, in 7 or 8 rather regular rows. Lateral line 

 with about 52 pores ; about 75 vertical rows of scales above it. 



Vertical fins low, the height of soft dorsal one-third length of head. 



Head 2f to 3 in length ; depth 3f (iu specimens 5 inches long). D. X, 

 12; A. Ill, 8. 



In color this species differs from its near relatives in having no black 

 on the inside of gill-cover, and in having a very light blue line below 

 the orbit. The snout is witiiout sjxjts or streaks. The upper i)art of 

 body is crossed with irregular dusky bars, and the soft dorsal and can- 



