542 A COLLECTION OF FISHES FROM SUMATRA. 



Scales large, cycloid, and those on middle of side with exposed widths a little 

 less than half of exposed depths. Top of head, including interorbital space, opercle, 

 subopercle, interopercle, and cheek scaly, other portions of head bare. Scales on 

 opercle large. Three series of scales on cheek. Scales enlarged a little on chest. 

 Fins scaleless, except base of caudal which is covered with enlarged scales. Ventral 

 with an elongate scaly flap a little over two-fifths length of fin. Lateral line con- 

 current with back, sloping down below bases of last dorsal rays and extending 

 along middle of side of caudal peduncle to base of caudal. Tubes of lateral line 

 arborescent, many bifurcations on each^scale. 



Origin of spinous dorsal over that of pectoral, spines more or less equal, first a 

 little shorter than others, and with flexible adipose ends, margin of fin entire. Soft 

 dorsal inserted nearly opposite tip of pectoral or nearly midway between base of cau- 

 dal and posterior margin of eye, rays of about equal length, and margin of fin with 

 shallow notches or emarginations between rays. Anal inserted about opposite base 

 of second dorsal ray, spines graduated to third which is longest, and each ending in 

 a flexible and adipose tip, like those of dorsal. Soft anal with rays more or less 

 similar, like those of dorsal. Caudal deeply lunate, upper and lower lobes pro- 

 longed into slender points. Pectoral broad, first divided ray longest, insertion of 

 fin a little low in depth of body, and its posterior margin straight. Ventral inserted 

 a little posterior to origin of pectoral, reaching two-thirds of distance to anal, and 

 spine about half way. Anus close in front of origin of anal. 



Color in arrack pale grayish-olive or dull olive-brown, lower surface paler or with 

 more of a pale brownish hue. Each scale on back and sides tinged with dull green- 

 ish-vellow. Cheek dull greenish-yellow, and same color of cheek extending across 

 chin. Upper lip largely greenish-yellow, and margin narrowly brownish. Several 

 short radiating bars from eye. Fins mostly pale brownish, margins- of dorsals and 

 anals narrowly dull greenish-yellow. Caudal dull greenish-yellow. Pectoral with 

 more or less dusky-olivaceous, margin broadly pale. Ventrals colored like belly. 

 Peritoneum silvery, sprinkled with minute blackish specks or dots. 



Length 25^ inches. 



Type No. 27,734, A. N. S. P. Padang. 



{Pinguis, plump; rostrum, snout.) 



197. ScARUS CALUS sp. nov. Plate XXI, lower figure. 



. Head 3; depth 2|; D. IX, 10; A. Ill, 9; P. n, 13; V. I, 5 ; 23 scales in a 

 lateral series below lateral line to base of caudal ; 2 scales between origin of spin- 

 ous dorsal and lateral line ; 8 scales obliquely back from origin of anal ; 24 scales 

 in lateral line, last one on base of caudal ; width of head If in its length ; depth 

 of head over anterior margin of eye 1^ ; snout 21 ; eye 8 ; mouth b\ ; maxillary 

 4 ; interorbital space 2|- ; caudal 1^, measured to tip of uppermost rays ; least depth 

 of caudal peduncle 2\; pectoral l-f-; ventral 2. 



Body rather deep, compressed, greatest depth near middle of pectoral, and back 

 well arched in a convex profile. Caudal peduncle compressed, and its least depth 

 equal to its length. 



