Fishes of the Western North Atlantic 245 



Genus CetengrauUs Giinther 1868 



Cetengraulis Giinther, Cat. Fish. Brit. Mus., 7, 1868: 383; genotype Engraulis cdentuha Cuvicr, first designated 

 by Jordan and Evermann, Bull. U. S.Nat. Mus., 47 (i), i8g6: 450. 



Characters. Body rather deep in adults but much more slender in young, quite 

 strongly compressed. Maxillary short, distally rounded or very bluntly pointed, 

 usually extending about to articulation of mandible. Teeth in jaws all very small (ap- 

 parently not disappearing with age as has been stated). Gill rakers long, close-set, 

 numerous, increasing with age (about 25 on lower limb in small specimens to about 60 in 

 large ones). Pelvic inserted under, or a little in advance of, dorsal origin. Silvery lateral 

 band present only in specimens about 100 mm TL or less. 



Remarks. Gill covers connected across the isthmus by a thin transparent membrane 

 (easily torn); narrow in very young. 



Range. The genus is represented on the Atlantic side by two species, ranging 

 from the West Indies to southern Brazil, and on the Pacific side by one species, C. mysti- 

 cetus, known from the Gulf of California to Peru. 



Key to Atlantic Species 



I a. Depth of body 3.0-3.4 in length; head 4.6-5.3; eye 3.7-4.6 in head; pectoral 

 failing to reach base of pelvic. edentulus (Cuvier) 1829, below. 



I b. Depth of body 5.0 in length; head ■^.^\ eye ^.^ in head; pectoral reaching a little 

 beyond base of pelvic. juruensis Boulenger 1898, p. 247. 



Cetengraulis edentulus (Cuvier) 1829 



Bocon (Cuba) 



Figure 59 



Study Material. About 70 specimens, mostly small, 35-160 mm TL; from Puerto 

 Rico; Jamaica; Cuba; and New Grenada; Colon, Panama; Gulf of Venezuela; Rio de 

 Janeiro, "Barro Santas," "Sambaia," and Cachoeira, Brazil. 



Distinctive Characters. See Key to Atlantic Species, above. 



Description. Proportional dimensions in per cent of standard length, based on 

 20 specimens, 70-160 mm, and most of the counts on many more. 



Body: depth 25-34.4. Scales: ca. 40-43. 



//e<?^: length 30-34.5. Gill rakers: ca. 30 + 36 in specimens 



6'wo«/: length 3.8-4.75. around 65 mm, about 52 + 55 in 



Eye: diameter 6.5-8.0. specimens about 130 mm TL. 



Postorbital: distance 18. 2-21. 2. Fin rays: dorsal 14-16; anal 23-26; 



Maxillary: length 1 7.2-1 9. pectoral 14 or 15. 



Mandible: length 1 7.3-1 8.5. Vertebrae: 42 (3 specimens). 



Anal fin: length of base 21.5-23. 



Pectoral fin: length 1 3.3-1 6.7. 



