. Bulletin - United States National Museum. Science. 242 BULLETIN 189, UNITED STATES NATIONAL MUSEUM included; maxillary reaching front of pupil, in head; teeth not evident; premaxillary groove broad, free from scales; preorbital very narrow, with an indentation under anterior part of eye, distinctly serrate in front of and behind indentation; preopercle serrate; gill rakers quite short, 13 on lower limb and about 8 on upper limb of first arch; scales large, with irregular membranous margins, forming a broad sheath on bases of dorsal and anal, extending on caudal, ventral, and slightly on
. Bulletin - United States National Museum. Science. 242 BULLETIN 189, UNITED STATES NATIONAL MUSEUM included; maxillary reaching front of pupil, in head; teeth not evident; premaxillary groove broad, free from scales; preorbital very narrow, with an indentation under anterior part of eye, distinctly serrate in front of and behind indentation; preopercle serrate; gill rakers quite short, 13 on lower limb and about 8 on upper limb of first arch; scales large, with irregular membranous margins, forming a broad sheath on bases of dorsal and anal, extending on caudal, ventral, and slightly on pectoral; dorsal spines strong, the second enlarged, a little longer than the third, in head; second spine of anal very strong, not reaching tip of third, in head; ventral in- serted slightly behind pectoral, failing to reach anal by about half diameter of eye, with a strong spine contained in head; pectoral long falcate, extending a little beyond tip of ventral, almost as along as head, in Figure 52.—Diafterus periche (Evermann and RadclifFe). From the type, Tumbes, Peru ( No. 77743). (After Gnres periche Evermann and Radcllffe, 1917.) Color, as described by Evermann and RadclifFe (see reference above), "Silvery, tinged with yellow, a black line along each row of scales above base of pectoral, about 9 of these black lines; no black area in axil of ; The color of tbe specimen remains about as described after many years' emersion in alcohol. The description is based on the type ( No. 77743), the only specimen known, which is about 255 mm. (198 mm. to base of caudal) long and was taken at Tumbes by R. E. Coker. This species, as represented by the type, differs from D. peruvianus in having a serrated preorbital. Range.—Known only from Tumbes, Peru. Family POMADASIDAE: Grunts Body more or less elongate; the back generally elevated; head large, blunt or rather pointed; mouth large or small, more or less horizontal, low,
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