SOUTH AMERICAN NEMATOGNATHI. 193 



patches one-fourth as large as the vomerine patches, 

 longitudinally ovate. 



Gill-rakers overlapping at the angle, 4+10. 



Dorsal spine inserted above the middle between bases 

 of pectoral and ventral; its distance from snout equal to 

 its distance from the adipose dorsal; its length 1| in 

 length of head; base of adipose equals the head in 

 length. 



Caudal forked, the outer rays more than twice as long 

 as the middle rays, 1J in length of head. 



Ventrals extending one-third their length beyond the 

 vent. 



Pectoral spine 1| in head, not roughened in front, fine 

 teeth on its posterior margin; a minute pectoral pore. 



Color grayish with dark spots; all fins dark with in- 

 distinct markings; barbels annulated with lighter and 

 darker. 



Head 4; depth 5J; Br. 9 or 10; D. I, 10 or 11; A. 12. 



XXIX. NEMUROGLANIS. 



E. & E. Proc. Cal. Acad. Sci. 2d Ser. vol. ii, 1889, 29 

 (lanceolatus) . 



Type: Nemuroglanis lanceolatus E. & E. 



This genus belongs with those Pimelodina Giinther 

 having teeth on the vomer. The character of its caudal 

 is sufficient to distinguish it. 



Caudal long lanceolate ; adipose fin long and low, joined 

 to the caudal. Head without any evident occipital pro- 

 cess. No bucklers in front of the dorsal which is placed 

 over the ventrals. 



141. Nemuroglanis lanceolatus, 



Nemuroglanis lanceolatus E. & E. Proc. Cal. Acad. 2d Ser. ii, 29, 



1889 (Jutahy). 

 Type: No. 8169; one specimen .035 m. Jutahy. Thayer Expedition. 



Elongate slender, tail compressed, head and body de- 

 13 



