238 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



tubercular, is not turned upward; deeper body, larger scales, and 

 darker color. 



(For Rolla P. Currie, who obtained the types.) 



HYDROCYNUS FOBSKALIl Cuvier. 



Head, 3^; depth, 4^; D. ii, 8; A. iii, 13; scales 44 hi lateral line 

 to caudal base and 4 more on latter; 8 scales above lateral Ime, 3 

 below to ventral, and same below to anal; 19 predorsal scales; 

 snout, 2| in head from upper jaw tip; eye, 4|; maxillary, 2^; inter- 

 orbital, 3i. Elongate, compressed, deepest at dorsal origm. Caudal 

 pedimcle compressed; least depth. If its length, or 2| in head. 

 Head well compressed, sides flattened; width, about 21 its length. 

 Snout, conic, long as wide. Eye, high, covered with broad adipose 

 lid in front and behmd; hind pupil edge about midway in head 

 length. Mouth, rather large, with powerful convex jaws, lower 

 little protruded. Upper jaw with 10 and lower with 8 large teeth. 

 Maxillary largely concealed below broad suborbital, reaches pupil. 

 Nostrils together, hind one about last fourth in snout. Interorbital 

 broad, very slightly convex. Rakers, ii, 3 + 10 ii, lanceolate, about 

 two-thirds of filaments and latter 1| in eye. Scales mostly uniform, 

 in even lengthwise rows, but little smaller on caudal base. Free 

 pointed axillary ventral scaly flap about tAvo-fifths of fin. Scales 

 with fine even basal cu-culi and one basal ray. Lateral Ime largely 

 straight, decurved suddenly from shoulder, low along caudal pedimcle 

 side. Tubes slender, well exposed, simple. Dorsal origin midway 

 between mandible tip and caudal base; first branched ray If 

 in head; adipose fin, 4. Anal inserted slightly nearer caudal 

 base than ventral origin; first branched ray about 2 in head. 

 Caudal deeply forked, long slender lobes about an eye-diameter 

 longer than head, pectoral 1§, ventral. If. Color m alcohol, dull 

 browTi, paler below. Narrow blackish brown longitudmal streak 

 along each row of scales on trunk. Dorsals and caudal with outer or 

 hind edges dusky gray, and median portion of lower caudal lobe 

 tinged with same. Lower fins brownish, median portions brighter 

 brownish. Iris, slaty. Length, 237 mm. C. 



^ALESTES LONGIPINNIS Gunther. 



Head, 3^ to 3§; depth, 2^; D. ii, 8; A. iii, 18; scales, 27 to 30 

 in lateral line to caudal base and 3 more on latter; 6 scales above 

 lateral line, 3 below; 12 or 13 predorsal scales; snout, 3^ to 3^ in 

 head; eye, 3i to 3i; maxillary, 2f to 3; interorbital, 2f to 2§. 

 Deeply elUpsoid, compressed, deepest at dorsal origin. Head width 

 If to 2 in its length. Snout conic, length three-fourths its width. 

 Eye advanced, hind pupil edge about midway in head length. 

 Maxillary to eye, largely concealed. Mouth broad, short, gape not 

 quite half way to eye; jaws about even. Upper teeth 6+8, lower 



