1390 Bulletin ,//, United States National Museum. 



weakly serrulate ; gill membranes united straight across breast, free from 

 the isthmus, their free border under posterior part of eye; gill rakers 

 small and short; psendobranchhe present; head more completely scaled 

 than in K. sectatrix; the naked areas similar, but more restricted ; scales 

 striated and rugose, but scarcely ctenoid, much smoother than in K. sectatrix, 

 those on middle of sides largest, those on breast not much reduced in size; 

 soft dorsal and anal completely covered wilh scales, the pectorals and 

 caudal nearly so; dorsal spines low, the longest 3^ in head, the base of the 

 fin nearly equal to that of the soft dorsal or the anal; soft dorsal very 

 low, its last ray longest, its middle rays not so long as the eye; caudal 

 extremely long, deeply forked, the lobes falcate, the upper rays more than 

 4 times the length of the middle rays and equal to the greatest depth 

 of the body; anal long and low, its base greater than length of head, its 

 last ray longest, its middle rays shorter than eye ; anal spines small, gradu- 

 ated; ventrals short, well behind pectorals, nearly | length of head, and 

 reaching halfway to front of anal; pectorals short, a little more than 

 head. Color in life: Back and sides above light olive-brown, becoming 

 yellowish-olive below; belly and lower part of sides white; each side 

 of back with a very distinct dark-blue stripe, commencing a little in front 

 of origin of dorsal and running to upper lobe of caudal fin, gradually 

 increasing in width backward to caudal peduncle, along which it is sud- 

 denly narrowed; a small blue spot on median line between the orbits, a 

 broad blue stripe from snout through eye to suprascapula; a second from 

 snout through lower margin of orbit to opercle, where it is abruptly 

 expanded; lores golden, abroad golden stripe behind angle of mouth, not 

 reaching preopercular margin ; a broad dark-blue stripe from above base 

 of pectorals straight to base of median caudal rays; below this is a nar- 

 rower golden stripe; lower part of sides with indistinct longitudinal 

 brownish streaks along the margins of the series of scales; vertical fins 

 golden yellow, caudal narrowly margined with black; pectorals brown 

 within, the outer side silvery with yellow tinge; ventrals yellow on inner 

 margins, silvery on the outer; roof of mouth and tongue bright white. 

 Panama; known only from the original types, (cbxvg, swift; ovpd, tail.) 



Pimelepterus ocyurug, JORDAN & GILBERT, Bull.TJ. S. Fish Comm. 1881, 327, 328, Bay of 



Panama. (Type, No. 29395, U. S. N. M. Coll. C. H. Gilbert.) 

 Kyphosus ocyurus, JORDAN, 1'roc. U. S. Nat. Mus. 1885, 380; JORDAN & FESLER, I. c., 536. 



568. MEDIALUNA, Jordan & Fesler. 

 (MEDIALUNAS.) 



Medialuna, JORDAN & FESLER, Review Sparoid Fishes, 536, 1893 (calif orniensis). 



Body ovate-elliptical, covered with small, firm, ctenoid scales, which 

 also cover the membranes of the soft parts of the vertical fins; mouth 

 small, terminal, horizontal; the maxillary narrow, slipping under the 

 edge of the rather narrow preorbital ; sides, top of head, and jaws closely 

 scaled; preopercle minutely crenulate at angle; jaws with b'road bands 

 of slender teeth, those in the outer series incisor-like, compressed, nar- 

 row, and lanceolate in form, the outer surface transversely convex, the 



