1014 Bulletin 47, United States National Museum. 



large, not very rough ; lateral line distinctly arched in front ; top of head 

 naked. Dorsal fin deeply notched, hut not divided to base, with 10 slender 

 spines ; caudal lunate ; anal spines graduated, the fin short. Coloration 

 bright silvery. (Named for Kuhl, a naturalist, associate of Van Hasselt, 

 and the discoverer of the typical species in the streams of Java.) 



a. Eye moderate, 3f in head; pectorals If in head; caudal with 2 oblique black bars on each 



lobe; dorsal with a dark bar. ARGE, 1411. 



aa. Eye very large 2g in head; pectorals 2 in head; fins not barred. XENURA, 1412. 



1411. KUHLIA ARGE, Jordan & Bollman. 



Head 3| to 3f; depth 2f ; eye 3f in head. D. IX-I, 11 j A. Ill, 11; 

 scales 7-50 to 52-12. Body oblong, strongly compressed ; back elevated 

 above pectorals, the anterior profile straight and rather deep; caudal 

 peduncle long, compressed. Mouth rather small, very oblique, the lower 

 jaw considerably projecting ; maxillary reaching anterior margin of pupil, 

 2f to 2f in head. Eye moderate, slightly longer than snout. Teeth very 

 small, in narrow bands, those on vomer in a Y-shaped patch. Preorbital 

 very narrow, its edge anteriorly with strong retro rse serrse, the moder- 

 ately broad maxillary not sheathed by it. Least width of preorbital 3| 

 in eye. Serrse of preopercle sharp and fine, well developed below angle. 

 Gill rakers long and slender, about 9 -\- 21. Scales rather small, ctenoid, 

 firm, 3 or 4 rows on cheeks, 2 rows on interopercle ; jaws, snout, and top 

 of head naked ; opercle with 2 strong spines, the lower the larger and 

 nearly as long as pupil. Lateral line anteriorly rather sharply curved 

 upward, concurrent with the back; no accessory ventral scale. Nostrils 

 very small, round, close together. Dorsal spines high and pungent, hardly 

 flexible, the first half as long as the second, the fifth longest, If in head, 

 reaching tip of eighth when depressed; dorsal fins very slightly con- 

 nected by membrane; soft dorsal If in anal, first ray 2 in head ; caudal 

 deeply forked, as long as head, its inner rays not quite half as long as 

 outer ; first anal spine If in second, which is strongest and equal in length 

 to third ; free margin of anal slightly concave, first soft ray 2f in head ; 

 pectorals short, pointed, If to \\ in head ; ventrals moderate, reaching 

 vent, 1| in head ; soft dorsal and anal free from scales ; a scaly sheath 

 along base of both dorsals. Coloration bluish above, sides brilliant sil- 

 very ; soft dorsal with a black oblique bar across its anterior rays; caudal 

 with 2 black and 3 white cross bands on each lobe, these convergent 

 backward; lower fins pale; axil of pectoral dusky on the inner side. 

 Length 1 foot. Galapagos and Revillagigedos archipelagos; locally com- 

 mon. This species was first known from several specimens taken by the 

 Albatross at Chatham Island. It has since been taken in great abundance 

 by Dr. Gilbert about Clarion Island. It is very close to Kuhlia taniura, of 

 the waters of Java, Sumatra, and Euro, with which it is identified by Dr. 

 Boulenger. Kuhlia tceniura has the eye larger, 2f to 3 in head. Compar- 

 ing our specimens with the full description of the latter species given by 

 Dr. Bleeker, we are able to detect no other difference, and it is possible 

 that our species will prove to be a variety of K. tceniura. (upyfa, bright.) 



