182 



BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



BELONOPERCA CHABANAUDI," new species 



Depth 3K to S}4; head 2% to 2%, width 3 to 3^- Snout 3 in 

 head from snout tip; eye 534 to 5 }<£, 1% to \% in snout, subequal 

 with interorbital; maxillary reaches ^5 to % in eye, expansion 1}4 

 in eye, length 2 to 23^ in head from snout tip; teeth villiform, in 

 bands in jaws, on vomer and palatines; tongue slender, toothless; 

 preopercle edge strongly denticulate, ridge entire, distinct; opercular 

 spines 3, equidistant, median most posterior; interopercle and sub- 

 opercle denticulate. Gill rakers 6 + 15, lanceolate, robust, greater 

 than gill rakers or equal 13^ in eye. 



Scales 66 to 68 in lateral line to caudal base and 6 or 7 more on 

 latter; 11 scales above lateral line, 34 below, 25 to 27 predorsal, 12 

 rows across cheek to preopercle ridge. Fins all scaleless, except cau- 



FlGURE 4.— BELONOPERCA CHABANAUDI, NEW SPECIE9. 



dal which with 2 rows at least. Front surface of ventrals with small 

 scales on each ray. Scales with 5 or 6 basal radiating striae; apical 

 denticles 20 to 22, each with 4 or 5 transverse series of basal elements; 

 circuli moderate. 



D. VIII-iv, 7, 1, fourth spine 3 to 3^ in total head length, first 

 divided ray 2%; A. II, 8, 1, spines very slender, short, and close, third 

 ray 234 to 2% ; caudal 1 Y2 to 1 % , truncate ; least depth of caudal pedun- 

 cle 2% to 2%; pectoral 2%; ventral 2^ to 2K- 



Dark ecru or chocolate brown, with obscure, ill-defined, variable 

 dark spots on side of head, middle of side of body, and on rays of 

 caudal fin. Iris brown. Spinous dorsal dusky, with obscure, large, 

 black ocellus with irregular border of dull blue gray, apparently in 

 front and behind. Membranes of other vertical fins pale buff, rays 

 darker, especially those of caudal which with dark spots. Pectoral 

 dull brown. Ventral more or less dusky. Narrow buff saddle, little 

 evident in profile, on front of caudal peduncle above behind soft 

 dorsal. 



Known only from the types obtained in the East Indies. 



"For Paul Chabanaud, of the Museum national d'histoire naturelle Paris. 



