28 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I07 



aurea. Other differences are shown in the following parallel 

 comparison. 



aurea pectinata 

 Scales small, 48 to 55 oblique series Scales larger, 35 to 46 oblique series 

 crossing middle of side, not closely crossing middle of side, notably more 

 imbricated, the length of the exposed closely imbricated, the length of the 

 part of each scale on middle of side exposed part of each scale on middle 

 usually about a third of the depth of side about a fourth of the depth 

 of that part of the scale, 7 longi- of that part of the scale, 5 longi- 

 tudinal rows on side of caudal pe- tudinal rows of scales on side of 

 duncle, 3 to 6 vertical series between caudal peduncle, o to 3 vertical series 

 tip of pectoral and base of ventral fin. between tip of pectoral and base of 



ventral fin. 



Fins short, the pectoral failing to reach Fins longer, the pectoral sometimes 



base of ventral by a distance varying reaching base of ventral, occasionally 



from half to a full diameter of eye, falling short of this point by diameter 



5.6 to 6.0 in standard length, 1.8 to of pupil, 5.0 to 5.7 in standard length, 



2.0 in head; ventral fin 3.5 to 4.25 1.55 to 1.8 in head; ventral fin 3.0 



in head ; lower lobe of caudal 2.85 to 3.7 in head ; lower lobe of caudal 



to 3.2 in standard length. 2.7 to 3.0 in standard length. 



Range. — The type locality, as given by Agassiz (Spix and Agas- 

 siz, 1829, p. 52), is Bahia and elsewhere on the coast of Brazil. Bahia 

 seems to remain the northernmost known limit of the range, whence 

 it extends at least to the Rio de la Plata, if Berg's ( 1895, p. 20) deter- 

 mination is correct. There are no specimens at hand from farther 

 south than Rio de Janeiro, Brazil. 



BREVOORTIA SMITHI Hildebrand 



Yellowfin Shad 



Figure 6 



Brevoortia aureus Hildebrand (not of Agassiz), 1919, p. 7, with fig., and pi. i, 

 fig. 2, Beaufort, N. C. (original description of B. smithi Hildebrand (see 

 next reference); compared with B. tyrannus; local occurrence; habits; 

 food). 



Brevoortia smithi Hildebrand, 1941, p. 224 (5. aureus, Hildebrand (see above) 

 recognized as distinct from B. aureus (Agassiz) and as without a name; 

 B. smithi proposed ; reference to original description ; specimen bearing 

 U.S.N.M. No. 118723 designated as type). 



On the identity of B. smithi. — The present writer, as shown by the 

 synonymy given, at first considered this menhaden identical with 

 B. aureus (Agassiz) from Brazil, and described specimens from 

 Beaufort, N. C, under that name. However, many years later when 

 the opportunity came to compare the North Carolina material with 

 South American specimens he arrived at the conclusion that the speci- 



