470 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



Head, 0.29 of total length to caudal base; depth, 0.429; dorsal, 75; 

 anal, 57; pores in the lateral line about 90. 



Dorsal outline of head uneven, slightly elevated above the eyes; 

 the anterodorsal margin of the orbit, the upper end of the premaxil- 

 lary spine, the mandibular angle, and the angular projecting into 

 the profile; eyes about equal, their anterior borders on about the 

 same vertical; diameter of upper eye 0.055; interorbital 0.015, 

 nearly flat, but with the ridge more prominent in some of the paratypes, 

 at the narrowest point with three rows of scales, some of which are 

 ctenoid; interorbital narrower in some paratypes with fewer rougher 

 scales; anterior nostril with a rather short, fleshy tube, the posterior 

 nostril horizontal, with the edges expanded to form a thin-walled 

 tube, shorter than the anterior tube, its dorsal edge the higher; 

 length of snout from anterior margin of upper orbit 0.052, naked 

 except on the anterior borders of the orbits, where the scales are more 

 strongly ctenoid in young paratypes ; maxillary strongly curved, but 

 less so than in H. dubius, the premaxillary less produced forward; 

 length of maxillary, eyed side 0.113, blind side 0.128; preorbital not 

 covering premaxillary before lower orbit; teeth uniserial, acute, 

 conic, somewhat irregular, enlarged anteriorly in both jaws to form 

 canines, which are less strongly developed than in H. dubius; teeth 

 better developed on the blind side; gill-rakers moderately slender, 

 smooth, 1 + 13 on the eyed side, 2 + 11 on the blind side, the longest 

 about 0.03, about half the diameter of eye. 



Body rather ovate than elliptical; dorsal and anal outlines similar, 

 the ventral a little more strongly curved. Depth of caudal peduncle 

 0.094, a little more than one- third length of head; length of caudal 

 peduncle about the same. Vertebrae 45 (13 + 32) in 1 specimen 

 counted, including the hypural plate. 



Scales ctenoid, but not very rough, both anteriorly and posteriorly 

 on the eyed side, weakly ctenoid on back and sides of blind side; 

 the belly and the head except the cheeks have ctenoid scales on the 

 eyed side, but cycloid and somewhat imbedded scales on the blind 

 side; fins of eyed side more or less covered with ctenoid scales, naked 

 on the blind side ; mandibles, lips, and the maxillaries nearly or entirely 

 naked; smaller paratypes have the blind side nearly smooth, but the 

 interorbital region, margin of orbits, maxillaries, and the sides of the 

 head on the eyed side are rougher. 



Dorsal increasing in length for more than half its length, the longest 

 ray about 3.5 in head, the anal similar; anal spine not strongly pro- 

 jecting; pectoral somewhat pointed, a little longer than height of 

 dorsal, of 11 rays; pectoral of blind side shorter and more rounded, 

 with the same number of rays. Ventrals symmetrical in position, 

 each of 6 rays, that of eyed side a little the shorter, but not con- 

 stantly so. 



