8 PROCEEDINGS OF THE NATIONAL MUSEUM voi.. 82, art. 21 



these doubled spots are roughl}^ aligned vertically to form a definite 

 suggestion of narrow bars. Some specimens show a trace of three 

 rows of small blotches, each row parallel with the dorsal contour. 

 The fins become dusky to blackish outward, but show no definite 

 black markings. 



The life colors of what was almost certainly an example of this 

 species from San Diego were thus described by Eigenmann and 

 Eigenmann (1890, pp. 9-10) : 



Silvery, the body profusely covered from dorsal to anal and ventral fins, 

 with squarish, bronze spots, the color being exactly like that which forms bars 

 and spots on A. argenteus, except that the brassy color in argenicus is modified 

 only by black dots, while in rlwdoterus the brassy color is modified by both 

 black and scarlet dots, the scarlet making the sides appear to be strongly 

 tinged with red. The brassy ground color of the spots is not resolved into 

 dots by the aid of a pocket lens, but appears as if evenly applied, and the red 

 and black dots sprinkled upon it. Dorsal surface backward to insertion of 

 dorsal fin, olive ; a blue metallic reflection above lat. line from nape back- 

 ward. Ventral surface backward to base of veutrals strongly scarlet tinged, the 

 red and black dots aggregated on the breast to form crescents parallel with 

 the scale margins ; premaxillary posteriorly, and maxillary, checks and opercles 

 also strongly red tinged, this region and the breast appearing, at a. glance, to be 

 " bloodshot." 



All the fins, except the pectoral, blackish at tips and reddish tinged ; an 

 olive streak through the dorsals which is most conspicuous anteriorly. Pecto- 

 rals reddish at base, otherwise plain and slightly olivaceous. 



Percy S. Barnhart, of the Scripps Institution of Oceanography, 

 writes that the specimen he collected at La Jolla had in life almost 

 exactly the color of Amphistichus argenteus. 



This species is dedicated to the well-known explorer Walter Koelz, 

 in recognition of his studies on the American coregonid fishes. 



