of Xorfli Americii. 5 



c. [Ocular band oxteudini>- from dorsal only to eye, not across the cheek ; 

 snout little produced, its length less than diameter of e3'e ; body 

 deep, the height If in extreme length ; muzzle with a blackish 

 band ; a transverse band l)etween eyes, much narrower than eye; 

 a band between dorsal fin and interorbital area, descending to 

 temples and bordered with whitish; another crosses dorsal fin, cau- 

 dal peduncle, and near margin of anal, the anterior margin of which 

 extends from the base of the anterior soft rays to axilla of anal 

 fin ; caudal, produced part of dorsal, margin of anal, and all of 

 pectoral and ventral fins pale. D. XII, 24. A. Ill, 20. Scales 



44.] {Gill) NiGRIROSTRIS, 2. 



cc. Ocnl(ir band e.vteiidii/f/ beyond tJic eye (icross the cJieek and i)ite roper ele; 

 no tninsverse band between the eyes. 



d. A large black spot, not ocellated, on base of soft dorsal ; an indistinct 

 band extending vertically across from it to base of. anal ; a small 

 black spot on tip of soft dorsal, (obsolete in young) ; ocular band 

 narrow^er than eye, extending from in front of dorsal through eye 

 and over interopercle ; no humeral band ; a black spot on opercle 

 above; body subrhomboidal ; the anterior profile concave ; snout 

 somewhat produced, longer than eye. Lateral line extending to 

 below posterior third of soft dorsal. Dorsal and anal fins angu- 

 lar behind ; depth li in length ; head 3. D. XIII (or XII), 20 ; 

 A. Ill, 16. Scales 6-34-15 ; (31 in a median series). 



OCELLATUS, 3. 



dd. No spot at base of soft dorsal ; dorsal and anal rounded behind.^ 



e. Humeral band wanting. 



f Ocular band jet black, not white-edged, little narrower than eye, 

 extending from first and second dorsal spine through eye 

 and over cheek ; another band from fourth and fifth dorsal 

 spines to base of posterior half of anal, not extending on 

 anal ; a dark line from dorsal down the middle line of fore- 

 head ; rest of body yellowish without markings. Body deep, 

 strongly compressed ; snout somewhat produced, 2h in head, 

 forming an angle with the descending profile ; second dorsal 

 spine highest, as long as head ; caudal rounded. Lateral 

 line extending to below first dorsal ray, depth If in length 

 (2 in total) ; head 2i (3) ; D. XII, 18 ; A. Ill, 17. Scales 

 9-36-17. Aya, 4. 



ff. [Ocnlar band edged with whitish, narrow^er than eye, con. 

 tinued across interopercle ; a browm, white-edged vertical 

 band from extremity of dorsal across tail over posterior half 



This character has not been verified in Cliaitodon aya. 



