438 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



of about same width as interspaces, and the fins darker. This species 

 is found in company with A. ellioti. 



In some of the smaller examples in the collection the fins are much 

 darker, almost black, and distal portions of anal and ventrals 

 blackish. 



AMIA ALBOMARGINATA Smith and Radcliffe, new species. 

 Plate 35, fig. 2. 



Dorsal vii-1,9; anal ii,8; scales 3 + 6-24. 



General form elliptical ovate, compressed; head 2.57, stout, upper 

 profile slightly concave, lower convex; body deep, back arched, 

 depth 2.57; caudal peduncle deep, compressed, depth 2.13, length 

 1.50; eye 3.94, small; snout 3.94, as long as eye, blunt; mouth oblique, 

 lower jaw projecting; maxillary 1.92, short, equal to snout plus eye, 

 not reacliing vertical from posterior border of orbit; anterior nostril 

 small, posterior large, circular; interorbital 4.85, narrow, with a 

 low median ridge; margin of peropercle nearly smooth, a few weak 

 denticulations present; intramarginal crest and outer orbital rim 

 weakly crenulate; teeth in jaws small, villiformlike, rather stocky at 

 base, in bands; a single row of teeth along ridge of vomer and palatine 

 bones; scales regular, ctenoid. 



Fins rounded; spinous dorsal lower than soft dorsal, spines rela- 

 tively weak, fourth longest, 2.52; soft dorsal 1.75; anal 1.94; ventrals 

 1.75; pectoral 1.53. 



Color in alcohol: Ground color light yellowish brown, darkest on 

 back, with silvery reflections especially on ventral surface; spinous 

 dorsal blackish distally; soft dorsal dusky, tips of rays blackish, a 

 dusky band near base; caudal dusky, lower margin white; ' anal 

 yellowish, first ray and tips of others white; ventral similar to anal; 

 pectoral without wliite edgings; opercle margined mth blackish 

 posteriorly; sides of head silvery. 



Type.—C&i. No. 68402, U.S.N.M., a specimen 10.2 cm. in length, 

 from the fish market at Cavite, Luzon. 



This species is distinguished by the plain coloration, white fin- 

 margins, smooth preopercle, and short maxillary, which is as long as 

 snout plus eye. In the related species, A. glaga, carinata, striata, etc., 

 the maxillary is longer than snout plus eye. 



Some ichthyologists have placed in the genus Mionorus those 

 species in which the preopercle is smooth. A comparison of this 

 species with A. glaga and carinata (margin of preopercle crenate, 

 without serrations) and A. lineata, ellioti, and striata (margin of 

 preopercle serrate) leads us to the conclusion that a separation of these 

 species based on the character of the armature of the preopercle can 

 hardly be called a natural classification. 



