1478 Bulletin 4.7, United States National Museum. 



a. Body rather deep, the back somewhat elevated, the depth about 3^ in length ; body 



with black cross bars ; barbels slender. 



POLYCLEMUS (TroAv?, many; KAe/ixo?, twig, from the many barbels) : 

 &. Dorsal rays about IX-1, 22; caudal fin double truncate, the middle rays longest. 

 c. Pectoral 1 in head; color grayish, with 6 broad black cross bars on body; 

 outer teeth of upper jaws scarcely enlarged. DUMERILI, 1864. 



ZONOSCION (6^05, zone ; <TKIOV, Scicena) : 

 bb. Dorsal rays X-I, 26 to 32; caudal fin obliquely truncate, lunate or /-shaped. 



d. Dorsal rays X-I, 29, caudal /-shaped, the middle rays longest ; pectoral 



If in head ; outer teeth above somewhat enlarged ; black bars on body 



faint. RATHBUNI, 1865. 



aa. Body comparatively elongate, the depth about 4 in length; the back not elevated; 



color dusky, the dark cross bars faint. 



ZACLEMUS (a, an intensive particle ; KAe>os, twig, from the large barbels) : 

 d. Upper jaw without enlarged teeth in its outer series ; barbels conspicuous ; 



pectoral moderate; caudal /-shaped, the lower lobe longest. 

 e. Pectoral 1 in head; color dusky with faint cross bars. D. Xl-25 to 27; 

 scales 45 to 48. GOODEI, 1866. 



PARALONCHURUS : 



dd. Upper jaw with the outer series of teeth enlarged; barbels very 



slender; pectoral very long ; caudal long, pointed. 

 /. Pectoral very long, somewhat longer than head; caudal pointed, as 

 long as head; color dusky, scarcely barred. D. X-I, 30; scales 

 50. PETERSI, 1867. 



Subgenus POLYCLEMUS, Berg. 

 1864. PARAL01YCHURUS DUMERILI (Bocourt). 



Head 3|; depth 2f. D. IX-I, 25; A. 11,7; orbit 54- in head; snout 3|; 

 maxillary 2; highest dorsal spine 2; dorsal ray 2f ; second anal spine 4; 

 length of caudal 1|; pectorals 1|; ventrals If. Body rather elongate, the 

 back somewhat elevated, ventral outline a little curved. Head low and 

 small; profile steep, somewhat concave; snout somewhat acute, with 

 large slits and pores ; preorbital broad ; interorbital area broad, convex, 

 3 in head; mouth small, entirely inferior; maxillary extending to the ver- 

 tical from the posterior part of pupil; teeth on jaws small, villiform, the 

 outer scarcely larger ; preopercle rounded, its edge with soft cilia which 

 grow larger from above downward ; gill rakers 3 or 4 -f- 7 or 8, minute, thick, 

 ish ; pseudobranchise none. Head and body covered with weakly ctenoid 

 scales, 52 in the lateral line. Lateral line much arched anteriorly, becom- 

 ing straight over the anal fin. A tuft of barbels at the symphysis of the 

 lower jaw, a single row of 8 or 10 barbels running backward along the 

 lower edge of each ranms. Dorsal spines rather stout, the first minute, 

 the third longest, the others gradually growing shorter to the ninth, which 

 is about i the length of the third spine ; soft dorsal lower than spinous, 

 the fin with a scaly sheath at the base, its membranes covered with small 

 scales; ventrals filiform at tip; anal inserted well forward, its first spine 

 about as large as the first dorsal, the second strong; caudal double trun- 

 cate. Color bluish gray above, silvery below ; 6 rather broad, distinct 

 cross bars of dark brown extending from the back down the sides. Mem- 

 branes of dorsal fins dusky, growing darker in the region of the body 

 bands and on the edges of the fins; caudal dusky, lighter near the base; 



