A COLLECTION OF FISHES FROM SUMATRA. 541 



Length 8|- inches. 



Type No. 27,730, A. N. S. P. Padang. 



Also three cotypes. Closely related to Hemipteronotus baldwini Jordan and 

 Evermann' from the Hawaiian Islands, but on comparison with one of the cotypes 

 of that species liogenys is seen to have but few scales on the cheek and not extend- 

 ing down to the mouth. It also has a larger pectoral. 



(Aeros, smooth ; yo^s, cheek.) 



SCARID.^. 

 196. ScARUS PINGUIROSTRA1US sp. nov. Plate XXI, upper figure. 



Head 2f ; depth 2|; D. IX, 10; A. Ill, 9; P. ii, 13; V. I, 5 ; scales 23 in 

 lateral series to base of caudal ; 2 scales between origin of spinous dorsal and lat- 

 eral line ; 8 scales between origin of spinous anal and lateral line ; 25 scales in 

 lateral line to base of caudal, last one on latter ; width of head 2 in its length ; 

 depth of head, over anterior margin of eye. If; snout l^a^; eye 9i; mouth 5^; 

 maxillary 31 ; interorbital space 3 ; ninth dorsal spine 3i ; first dorsal ray from tip 

 of anterior bifurcation 4 ; ninth 3f ; third anal sphie 3^ ; first anal ray from tip of 

 anterior bifurcation 31 ; eighth 3i; least depth of caudal peduncle 2|; pectoral If; 



ventral 2. 



Body elongate, robust, well compressed, greatest depth near middle of pectoral, 

 profiles evenly convex, and upper more so than lower. Caudal peduncle large, 

 compressed, and its least depth about seven-eighths its length. 



Head large, moderately compressed, cheeks a little flattened, and upper profile 

 from above front of eye to occiput convex. Snout large, its surface convex, profile at 

 first convex then slightly concave, and in front extending a little beyond upper man- 

 dible. Snout also soft to touch. Eye small, circular, high, and midway in length of 

 head. Mouth inferior, and its corner extending about two-fifths in space opposite 

 vertical from front of eye. Teeth developed as two sharp uneven-edged mandibles 

 with a smooth convex surface, and more or less convex granulations along their 

 edges. Two posterior canine teeth on each side of upper mandible. A thick 

 fleshy buccal fold inside of each mandible. Tongue convex, thick, and not free. 

 Lips tough and fleshy, though not covering much of mandibles. Maxillary extend- 

 ing about opposite posterior nostril. Nostrils small, lateral, inconspicuous, separated, 

 though close together, and situated a little over an eye-diameter before, and a little 

 inferior to, front margin of orbit. Interorbital space broad and convex. Opercular 

 flap narrow. 



Gill-opening extending forward about opposite anterior margin of eye. Gill- 

 rakers 45, small, compressed, and ending in attenuated slender flexible points, 

 longest about a third of orbit. Filaments long, numerous, longest four and seven- 

 eighths in head. Gill-rakers on inner edge of first branchial arch well developed, 

 similar to outer series, only a little longer. Pseudobranchia^ about three-fifths 

 diameter of eye. Isthmus a little broad, membrane adnate, only forming a narrow 

 frenum across. 



' Bull. U. S. Fish. Comra., 1902 (1903), p. 192. 



