SOUTH AMERICAN NEMATOGNATH I. 219 



Teeth of lower jaw, as in most species 

 of this group, in a narrow band; those 

 of the upper jaw in an arrow-shaped 

 patch, those of the vomer in an oo- 

 shaped patch; the palatine patches long 

 and narrow, remote from the vomerine 

 patches; lower lip plicate. 



Gill-membranes separate to beyond 

 eye; gill-rakers overlapping, 5-J-14. 



Roughened plates on the lateral line 

 anteriorly. 



Dorsal spine behind middle from tip 

 of snout and end of adipose dorsal; long; slender, 

 with recurved teeth behind; 2-J in head. Adipose fin 

 longer than base of anal. 



Caudal very deeply forked; the outer rays more than 

 half length of body; numerous basal rays. 



Ventrals extending for | of their length beyond the 

 vent; distance from vent to anal equals 4 diameters of 

 the eye; distance from vent to middle caudal rays equals 

 length of head. 



Pectoral spine 2J- in length of head; with retrorse 

 teeth behind. A pectoral pore. 



Uniform light brown, silvery below; several large 

 round black spots on sides; usually one on base of upper 

 lobe of caudal fin. 



Head 2f-2f ; depth 7J; Br. 9 or 10; D. I, 6; A. 12. 



SUBFAMILY DORADIN^. 



ANALYSIS OF THE GENERA OF DORADINJE. 



a. Barbels all simple. 



6. Eye in anterior portion of head; snout depressed; teeth well devel- 

 oped. 



c. Humeral process much shorter and weaker than the coracoid pro- 

 cess. No adipose dorsal; gill-openings greatly reduced. Clavicle 

 and coracoid forming a large shield below. PHYSOPYXIS xxxix. 



