Fishes of the Western North Atlantic 423 



Synonyms and References: 



P seudochirocentrodon amazonicum Miranda-Ribeiro, Publ. Comm. Linhas Telegr. Estrat. Amazonas, 58, 1923 



("1920"): 8 (orig. descr., type local. Mandos, Estado de Amazonas, Brazil). 

 Ilisha iquitensis Nakashima, Bol. Mus. Hist. Nat. "Javier Prado," 5(16), 1941: 66, fig. (orig. descr.; type 



local, environs of Iquitos, Peruvian Amazon). 

 Ilisha apapae Hildebrand, Smithson. misc. Coll., no (9), 1948: 3, fig. 2 (orig. descr.; type local. Rio Amazonas 



somewhere between Para and Mangos, Brazil; type USNM 52550). 

 Ilisha amazonica Myers, Copeia, 1950: 63 (synon., types of P. amazonicum and /. apapae). 



Ilisha harroweri Fowler 1 9 1 7 



Caille (Trinidad) 



Figure 106 



Study Material. Twenty-two specimens, 45—155 mm TL, 34-122 mm SL, from 

 Atlantic coast of Panama (20 specimens) and Port-of-Spain, Trinidad (2). One from 

 Barro Santos and another from Porto Inhuana, southern Brazil, were compared and 

 probably belong to this species. 



Distinctive Characters. See Relationship. 



Description. Proportional dimensions in per cent of standard length, and counts, 

 based on study specimens, 34—122 mm SL. 



Body: depth 36.5-40. Pectoral fin: length 18-2 1.5. 



Caudal peduncle: depth 9.0—10.4. Distance from snout to origin of: dorsal 



Head: length 28-30; depth 28.5-31.5. 47-51- 



Snout: length 6.0—7.5. 



Eye: diameter 9.75-1 1.8. Scales: ca. 33—37, usually lost in pre- 



Interorbital: width 3.6—4.1. served specimens. 



Maxillary: length 14. 3- 16. Ventral scutes: 25-27. 



Mandible: length i^.^-iy. Fin rays: dorsal 15 or 16 (rarely 17); 



Anal fin: length of base 37-43. anal 36—42; pectoral 13—15. 



Pelvic fin: length 7.4—9.0. Vertebrae: 39 or 40 (5 specimens). 



Body deep, strongly compressed. Its greatest thickness definitely less than a third 

 of Its depth, Its greatest depth 2.5—2.75 in SL; the dorsal outline only slightly convex, 

 the ventral outline strongly convex. Caudal peduncle strongly compressed, its depth 

 2.8—3.2 in head. 



Scales mostly lost in preserved specimens; those from middle of side below an- 

 terior rays of dorsal definitely deeper than long, with about 3-7 vertical grooves, all 

 except the posterior one interrupted, the margin of these scales irregularly indented. 

 Ventral scutes strong, 19—21 (usually 20) in advance of pelvic fins and 6 be- 

 hind them. 



Head 3.33— 3-55 In SL, its depth at vertical from crossgroove at occiput 3.15— 3.5. 

 Snout shorter than eye, with a slight median notch, 4. 15-5. 15 In head. Eye 2.55—2.8 



