196 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



on base of caudal, two complete rows between lateral line and base of 

 first dorsal; spines of first dorsal moderately strong, the second and 

 third generally of about equal length, 2.3 to 2.7 in head; origin of first 

 dorsal over base of pectoral; second dorsal notably higher than the 

 first, the anterior elevated lobe pointed, the longest rays not quite so 

 long as head without snout; caudal concave, the lobes rounded; anal 

 similar to second dorsal, its first spine very short, the second 3.0 to 3.4 

 in head, origin of fin slightly behind that of second dorsal; ventral 

 reaching to or beyond vent, but not quite to origin of anal; pectoral 

 long, rounded, 4.0 to 4.2 in head. 



Color of preserved specimens grayish brown above; pale under- 

 neath ; chest silvery (almost wholly red in life) ; back and side almost 

 everywhere with dusky punctulations ; a black vertical bar under the 

 third to fifth ray of second dorsal, extending down to about middle 

 of side, not at all encroaching on fin; no caudal spot; a faint dark 

 band on opercle, becoming narrower and more distinct in front of eye 

 and extending around the snout; first dorsal mostly dusky; tip of an- 

 terior lobe of second dorsal black, the rest of fin pale; anal pale, the 

 anterior lobe at the most only slightly dusky; caudal pale, or at the 

 most with only a few dusky points; ventrals and pectorals pale. 



The Mission furnished 14 specimens, 45 to 70 mm. (35 to 53 mm. to 

 base of caudal) long, taken in Lobos de Afuera Bay and iu Samanco 

 Bay. Three additional specimens, respectively 70, 70, and 75 mm. 

 long, collected at Lobos de Afuera by R. E. Coker, also are at hand. 

 These are part of the specimens reported as Amia retrosella Gill, by 

 Evermann and RadclifTe (see reference above) . These specimens were 

 compared with numerous examples from Acapulco, Mexico, and San 

 Benito Island, Baja California, with which they seem to be speci- 

 fically identical. 



A. parri differs from A. retrosella (apparently known only from 

 Baja Cahfornia), with which it has been confused in collections, in 

 color in the absence of a black caudal spot, and in the ending of the 

 dark half-bar under the second dorsal without extending at all on the 

 base of the fin. Structurally it differs in having a smaller eye, in 

 having a rather shorter maxillary, and in having one to two fewer 

 gill rakers on each limb of the first arch (eye 2.7 to 2.9; maxillary 1.7 

 to 1.9 in head; 11 or 12 rakers developed on lower limb, and three 

 on upper limb of first arch in A. retrosella. 



A. parri differs from A. dovii, with which it was taken in Pej-u, in the 

 presence of the black bar under the second dorsal and in the absence of 

 a caudal spot. Structurally it differs in having a slightly longer 

 maxillary and also in having almost constantly one or two fewer gill 

 rakers on each limb of the first arch. 



Range. — Baja California to Peru. Not as yet reported from local- 

 ities intermediate of Baja California and Peru. 



