2 2 o Memoir Sears Foundation for Marine Research 



head. Mandible i. 63-1. 77. Cheek very short and broad, slightly rounded poste- 

 riorly, scarcely as long as eye, and scarcely forming an angle. 



Dorsal fin with longest rays reaching to or beyond tip of last ray if deflexed, 

 its origin generally a little nearer to caudal base than to tip of snout. Anal originating 

 immediately behind vertical from base of last ray of dorsal, its base 6.7—7.4 i" SL. 

 Pelvic reaching a little more than halfway to anal, inserted nearer to base of pectoral 

 than to origin of anal by diameter of pupil. Pectoral moderately falcate, failing to 

 reach pelvic by diameter of pupil, 1.4— 1.6 in head. Axillary scale of pectoral reaching 

 opposite distal third of fin, 2.0—2.2 in head. 



Color. In alcohol, pale, probably preserved originally in formalin. Lateral band 

 bright silvery, nearly as broad as eye, bounded above by a dark line. Tip of snout and 

 back with dusky punctulations, these sometimes arranged in two more or less definite 

 rows posterior to dorsal fin. Caudal with dusky markings and sometimes with a broad 

 dusky margin. 



Range. Known only from the Peruvian Amazon country, from Lake Cashiboya, 

 and Gosulima Cocha, Upper Rio Morona, Peru, 2,000 miles from the sea. 



Synonyms and References: 



Amplova alleni Myers, Proc. Calif. Acad. Sci., (4) 2 J, 1940: 441 (orig. descr.; type local. Lake Cashiboya, 

 Peru; type CAS 6421; cf. Stolephorus guianensh Eigenmann and Engraulh brevirostris Giinther; para- 

 types from Lake Cashiboya, Rio Ucayale; Gosulima Cocha, Upper Rio Morona; and Rio Morona, 

 all in Peru); Eigenmann and Allen, Fishes West. S. Amer., Univ. Ky., 1942: 333 (add. specimens from 

 upper Amazon basin). 



Anchovklla alleni Hildebrand, Bull. Bingham oceanogr. Coll., 8 (2), 1943: 124, fig. 53 (descr. of type material; 

 cf. Stolephorus guianensis Eigenmann). 



AnchovieUa nattereri (Steindachner) 1879 



Study Material. None. 



Distinctive Characters. In general, A. nattereri seems to be related to A. blackburni 

 and A. lepidentostole, but it differs from each of them in the rather more numerous anal 

 rays, the more posterior origin of the anal in relation to the dorsal, and the much longer 

 pectoral fin, which overlaps the pelvic. 



Description. Based on original account, translated and condensed from Stein- 

 dachner, of a specimen 50 mm long.^^ 



II. A description with figure of an anchovy from Iquitos, Peru (upper Amazon Basin), designated Engraulis iquitensis 

 by Shoji Nakashima {14: 6), shows some of the characters of ^. nattereri. At least the general shape of the body, 

 the number of anal rays, and the long pectoral overlapping the base of the pelvic seem to agree. However, Naka- 

 shima did not describe the maxillary, and its outline is not clearly shown in the figure; the number of gill rakers 

 is not stated; and the description and figure do not agree in several respects. Therefore, it is impossible to place the 

 fish in any genus with a degree of certainty, or to determine the validity of the species. As the author designated 

 no type and failed to compare his fish with any known species, the name probably is without standing and no 

 further reference will be made to it. 



