58 PROCEEDINGS OF THE ACADEMY OF [Jan., 



that of former witliout backward elongation. Tongue small, a little 

 (elongate, rounded, and free in front. Tongue and basibranchials with 

 fine asperous patches. Nostrils adjoining, level with upper part of 

 iris, posterior a little larger, and without flap in front. Interorl)ital 

 space elevated and a median trenchant keel extending from 

 intcrnasal space to spinous dorsal. 



Gill-opening extending forward a trifle before front rim of orbit. 

 Rakers 9+16, slender, compressed, pointed, and longest equal to 

 filaments which are about f of orbit. Pseudobranchise small. Isth- 

 mus strongly compressed but its edge rounded. 



Scales small, elongate, not narrowl}^ so, and not on head and fins, 

 except base of caudal. Lateral line a little wavy at first, becoming 

 straight after origin of soft anal. Axillary cavities at bases of pectoral 

 and ventral. Each dorsal and anal spine depressible in a groove. 



First dorsal spine directed forward, and its tip about opposite first 

 third of pectoral. Of depressible spines fifth and sixth longest, and 

 seventh a little shorter than fourth. When depressed spines overlap. 

 Soft dorsal inserted a little nearer snout than base of caudal, first few- 

 rays longest, and about last eleven finlet-like though joined by a mem- 

 brane. Soft anal inserted behind origin of soft dorsal and fin similar. 

 Caudal forked, lobes pointed, and rather slender. Spinous anal in- 

 serted well beyond tip of pectoral, second spine longest and reaching 

 origin of rayed fin. Pectoral broad, short, and origin of fin a little 

 below middle of depth. Ventral large, inserted opposite origin of 

 pectoral. First ray reaching about f of space to spinous anal, and 

 innerqiost joined to abdomen by a membrane. Spine slender and a 

 little over half of length of fin. 



Color in alcohol pale brownish-drab-gray above, side and lower sur- 

 face silvery-white. Side of head silvery. Fins pale straw-brownish, 

 (>nds of caudal lobes a little darker, and upper portions of soft dorsal 

 rays deep brownish-black. Ventral and anal whitish. No blotches 

 apparent on side of trunk. Iris pale brassy. Peritoneum whitish. 



Length 6j inches. 



No. 11,328, A. N. S. P. One example from Christmas Island, 

 lat. 1° 59' N., long. 157° 32' W., Polynesia. Dr. William H. Jones. 



One from Manila, Philippine Islands, from Dr. M. Burrough, differs 

 a little as follows: Head 4^; depth 3f ; width of head 2f in its length; 

 depth of head 1-|; mandible If; pectoral H; ventral about 2; snout 

 3^ in head, measured from tip of upper jaw. Maxillary reaching a 

 little nearer posterior rim of orbit. Length 6^ inches. 



Also two examples, probably from Polynesia. They agree in most 



