FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 123 



Body moderately elongate. Eye large. Teeth in villiform bands 

 in jaws, on vomer and palatines, usually some in both jaws enlarged 

 canines. Opercle without spine. Preopercle ridge entire or serrate, 

 edge serrate. Gill rakers 12 to 15 on lower branch of first arch. 

 Branchiostegals 7. Scales large, deciduous, 22 to 24 in lateral line to 

 caudal base. Head scaly. Two separated dorsals, first with 6 spines, 

 second with spine and 8 to 10 rays. Anal with 2 spines and 8 or 9 

 rays. Caudal emarginate or forked. Coloration usually with dark 

 longitudinal stripes. 



Small tropical fishes, differing from Amia chiefly in the presence 

 of canine teeth in the jaws. 



ANALYSIS OF THE SPECIES 



a 1 . Desmoamia new subgenus. Single, median, dark, lateral band and paler 

 parallel band along back; caudal without median dark or black basal spot. 



zonatus 

 a 2 . Cheilodipterus. Four to 9 or more dark longitudinal bands; usually dark, 

 round, basal caudal spot. 

 b 1 . Four black longitudinal bands, slightly narrower than pale interspaces. 



nigrotaeniatus 

 b 2 . Five dark or black longitudinal bands. 



c 1 . Dark longitudinal bands not extending on head and whole coloration with- 

 out bands contrasted singapur ensis 



c 2 . Dark lateral bands extending on head and greatly contrasted. 



quinquelineatus 



b 3 . Seven to 9 dark brown longitudinal bands, slightly narrower than pale 



interspaces, each of which may have a dark intermediate parallel line, with 



bands thus increased to 17 lineatus 



Desmoamia, 8 new subgenus 



Type. — Cheilodipterus zonatus Smith and Radcliffe. 

 Diagnosis. — Single, median dark lateral band and paler parallel 

 band along back. Caudal without black median basal spot. 



CHEILODIPTERUS ZONATUS Smith and Radcliffe 



Cheilodipterus zonatus Smith and Radcliffe, Proc. U. S. Nat. Mus., vol. 

 41, 1912, p. 443, pi. 38, fig. 1. South Rita and Endeavor Strait, Palawan. 



Depth 4 to 4}yi; head 2% to 2%, width 2}4 to 2%. Snout 4^ to 

 4% in head from snout tip; eye 3% to 33^, greater than snout or 

 interorbital; maxillary reaches % in eye, expansion 2 to 2 T V in eye, 

 length 1^ to 2; teeth in villiform bands in jaws, on vomer and pala- 

 tines and outer series of about 8 anteriorly above as slightly canine-like ; 

 small canine each side of mandible, another each side of vomer and row 

 of outer enlarged mandibular laterals, posteriorly largest; interorbital 

 5, nearly level or only slightly depressed; preopercle ridge and edge 

 entire. Gill rakers 5+15, lanceolate, equal gill filaments or 34 m 

 eye, also some as rudiments. 



s 5«7/ios band, with reference to the median dark lateral band; Amia. 



