No.his. PROCEEDINGS OF THE NATIONAL MUSEUM. 445 



branchiostegal rays, preorbital, and top of Lead forward to near 

 extreme tip of snout. On snout, preorbital and mandibles, the scales 

 are cycloid. 



Color {in alcohol). — Xearly uniform light brown, lighter below and 

 with some silvery luster. Fins all dusky, the anal and ventrals black, 

 the outer ventral ray white. Opercular lining dusky. 



Type. — No. 47742, U.S.N.M. Six specimens, the longest, 115 mm. long, 

 from San Juan Lagoon, south of Guaymas, Mexico. 



Family CH^ETODONTID^. 



HOLACANTHUS lODOCUS,' Jordan and Rutter, new species. 



Head 3? ; depth 1| (2 in total); eye 4| ; dorsal XIV, 20; anal HI, 20. 



Body very deep, forming almost a regular ellipse, slightly concave 

 above eye and in front of eye. Preorbital, without spine, shorter 

 than width of interorbital, which is narrower than distance between 

 eye and upper end of gill opening. Spine at angle of preopercle 

 straight, longer than orbit, about equal to preorbital; 8 or 9 spines on 

 upper limb of preopercle, these nearly half as long as the one at angle 

 and very much longer than in Holacanthn.s ciliaris; 2 weak spines on 

 lower limb, and 2 on interopercle. Soft dorsal and anal falcate, the 

 longest rays filamentous; pectoral ver}^ obli<iuely rounded, the lower 

 rays scarcely one-third as long as the upper. Ventral slightly filament- 

 ous, equal to head. Lateral line regularly arched, but approaching the 

 dorsal outline i)osteriorly, ceasing before reaching end of dorsal. Scales 

 below lateral line regularly arranged, those above irregular. 



Color {in alcohol). — Uuiforin gray (probably orange in life), scales 

 edged with silvery; a very faint, narrow black or dark blue edge to 

 dorsal anterior to filament; terminal half of i)ectoral, third of caudal, 

 and tips of dorsal and anal behind and including the falcate lobes, 

 yellow; no blue on concave part of dorsal and anal; lips pale, edge of 

 opercledark blue; a faint indication of a dark blotch iu front of dorsal; 

 no blue-black blotch on base of pectoral. 



This species differs from Holacanthm ciliaris iu the elliptical form of 

 the body, in color, and especially iu the very long spines on the upx)er 

 limb of preopercle. 



Type. — No. 47747, U.S.N.M. A single specimen, 9 inches long, from 

 the Galapagos Archipelago, collected by United States Fish Commission 

 Steamer Albatross. 



Family TEUTHIDID.E. 



XESURUS CLARIONIS, Gilbert and Starks, 



(Plate LI.) 



Head 3i iu length to base of caudal; depth 2; dorsal YII, 2G; anal 

 III, 22; eye 3 iu snout; pectoral 4 iu length; ventral 7. 



I'oSoKoi, a slieaf of arrows, from the spinous preopercle. 



L 



