98 U.S. NATIONAL MUSEUM BULLETIN 202 Vol. 2 



of pelvic fin 0.9 to 1.2, of last dorsal spine 1.4 to 2,1, of upper caudal 

 rays 0.8 to 1.2, of lower caudal rays 0.9 to 1.3; all in length of head 

 (tip of snout to hind margin of opercular flap); depth of caudal 

 peduncle in its length 1.0 to 1.1 ; angle of snout profile with lengthwise 

 axis of body 47 to 59 degrees, upper profile convex. 



Teeth of jaws long, slender, cylindrical, curved, close set, numerous, 

 produced, their tips only slightly flattened, entire, rounded, pale 

 brown; lips, thick, curled back but not fimbriate or rugose; preorbital 

 not notched, naked, suborbital scaled; scales on top of head anterior 

 to nostrils, many with basal accessory scales; interorbital convex; pre- 

 opercular margin entire, opercular spine not evident, hidden by scales; 

 gill rakers on lower branch of first arch short, wedge-shaped, the 2 of 

 upper branch close to angle, rest of upper branch of arch smooth, en- 

 larged and fleshy; dorsal spines gradually increasing in length to last, 

 soft dorsal rounded in small specimens 30 to 40 mm., and in largest 

 (72 mm.) anterior rays of both dorsal and anal produced and fila- 

 mentous; caudal lobes angular, pelvics with outer ray filamentous 

 though not much elongated; pectoral short and rounded. 



Color in alcohol. — Lips dark grayish brown, top of head reddish 

 brown or dark brown ; margins of scales of back and sides with narrow, 

 vertical, dark brown bar and pale yellowish bases, so that body has 

 appearance of many fine diagonal lines following the transverse scale 

 rows and slanting upward and slightly posteriorly; lower sides and 

 belly light reddish brown; black crescent-shaped band 4 or 5 scale 

 rows wide on posterior part of body, originating on anterior dorsal 

 rays and extending to tips of anterior anal rays; caudal peduncle and 

 caudal fin bright yellow or pale whitish, outer edges of upper and lower 

 caudal rays with thin black line basally; scaly sheath of spiny dorsal 

 reddish brown, membrane and spines dusky grayish or blackish, 

 anterior dorsal rays dark gray or blackish, posterior rays pale; anal 

 almost entirely black but last 4 or 5 rows lighter, sometimes pale; 

 pelvics with outer rays dusky brown, inner two pale; pectoral fin pale, 

 its base bright or pale yellowish. 



ABUDEFDUF IMPARIPENNIS (Vaillant and Sanvage) 



Plate 87, E 



Glyphisodon imparipennis Vaillant and Sauvage, Rev. Mag. Zool., ser. 3, vol. 3, 

 p. 279, 1875 (type locality, Honolulu). 



SPECIMENS STUDIED 



Bikini Atoll, 11 stations, 91 specimens, 29 to 45 mm. in standard length. 

 Eniwetok Atoll: 1 station, 2 specimens, 44 mm. 

 Rongelap Atoll: 1 station, 4 specimens, 38 to 44 mm. 

 Rongerik Atoll, 2 stations, 5 specimens, 38 to 45 mm. 



Description. — Dorsal fin rays usually XII, 15 (rarely 14 or 16); anal 

 rays 11,11 (rarely 12); pectorals ii, 17 to 19 (usually 18); transverse 



