

Jordan and Evermann. Fishes of North America. 3191 



("Named for Dr. A. Stahl, of Bayamon, Puerto Rico, who, under many 

 difficulties put in his way by Spanish authorities, made important col- 

 lections of natural history objects of that island.") 



Auchenistius stahli, EVERMANN & MARSH, Rept. U. S. Fish Com. 1899 (Dec. 19, 1899), 359, 

 Ponce, P. R. (Type. No. 49372, U.S. X.M. Coll. Evermann & Mars],.) 



Page 2373. Before Auchenopterus fasciatus (Steiudacher), insert: 

 2717 (a). AUCHENOPTERUS ALBICAUDUS, Everniann &. Marsh. 



Head 3.2; depth 4; eye 4; snout 4.1; maxillary 2.2; mandible l.G; inter- 

 orbital 5.3; D. XXX, 1; A. II, 17; pectoral 1.4; ventral 1.5; caudal 1.6; 

 branchiostegals 6 ; scales 1-34-6. 



Body rather short, compressed; dorsal outline not elevated; head mode- 

 rate, not broad; snout short, pointed; mouth large, oblique, maxillary 

 extending to below middle of eye ; lips broad, prominent ; a band of conical 

 teeth on each jaw, those on side somewhat enlarged and recurved ; a patch of 

 teeth 011 vomer, none on palatines; gill-membranes broadly united, free from 

 isthmus; eye large, high up; nasal, supraocular, and nuchal regions with 

 fringed tuft-like cirri; a considerable notch between fourth and fifth 

 dorsal spines, but not reaching base of membrane; longest anterior spine 

 scarcely as long as those of the posterior portion ; scales large, reduced 

 anteriorly; lateral line anteriorly separated from the dorsal fin by only 

 one scale; head naked. 



Color : Uniform dark brown on head and body, no dark crossbars; dorsal 

 brown, mottled with lighter, narrowly edged with white; a black spot 

 upon anterior 3 or 4 spines and a large black ocellus upon posterior portion 

 of fin between twenty-second and twenty-fourth spines; anal rather 

 darker, with narrow white edge; caudal peduncle black, the fin abruptly 

 white at base, the entire fin being clear white, entirely without specks; 

 pectoral black at base, then barred with white and dark; ventral black 

 at base, the outer two-thirds barred with black and white. 



This species seems to be related to the Pacific-coast species, Auclien- 

 opterus Integripinnis, which it closely resembles, but differs from that 

 species in the larger scales, the deeper body, and the coloration. 



Puerto Rico; known only from the type, a specimen 1.5 inches long, 

 obtained by the U. S. Fish Commission expedition to Puerto Rico, February 

 4, 1899. 



(albus, white; cauda, tail.) 



Auchenopterus albicaudus, EVERMANN & MARSH. Kept. TJ. S. Fish Com. 1899 (Dec. 19, 1899), 

 360, Arroyo, P. R. (Type, No. 49373, U.S.N.M Coll. Evermann &, Marsh.) 



2717 (b). AUCHEXOPTERUS RUBESCEXS, Evermann & Marsh. 



Head 34; depth 5; eye 5; snout 3,8; maxillary 2.6; interorbital 5.8; 

 scales 2-32-8; D. XXX, 1; A. II, 18; pectoral 1.5; ventral 2; caudal 1.4. 



Body slender and compressed; head moderate, somewhat compressed 

 above; snout pointed; mouth moderate, the jaws equal, the maxillary 

 about reaching front of pupil; lips, especially the upper, prominent; teeth . 

 small, conical and sharp, in both jaws, in a numerous patch on front of 



