312 MEMOIRS OF THE CARNEGIE MUSEUM. 



over middle of the ventrals, its distance from the middle of the caudal one and 

 three-fourths to one and eight-tenths in its distance from the snout. 



Sides and back in the young with black spots, the middle ones of the sides 

 larger and forming a more or less. regular series in the young and half-grown; in the 

 largest specimen the caudal peduncle and base of the caudal are profusely covered 

 with spots smaller than the eye, the spots larger, less numerous and less conspicuous 

 forwards. 



Teeth round-tipped incisors in the largest, more pointed but distinct incisors 

 in the middle-sized specimens; the teeth of the type narrow, pointed incisors. 



28. Pygidium latidens Eigenmann. (Plate XLVII, fig. 4.) 

 Pygidium latidens Eigenmann, Proc. Am. Philos. Soc, LVI, Jan., 1918, p. 693. 

 13801, I. U. M., one, 53 mm. Small creek near the mouth of Rio Calima, north of 



Buenaventura. May 7, 1913. Henn. 



Head 5.5; D. 9.5; A. 7.5; P. 7; posterior edge of eye in advance of the middle of 

 the head; interocular 3.5 in the head. 



Nasal barbel extending beyond the tips of the opercular spines; maxillary 

 barbel extending beyond the axil, longer than the head; pectorals broad, as long 

 as head without snout ; pectoral filament equal to the distance from the snout to the 

 axil; ventrals not nearly reaching anus, their origin equidistant from the base of 

 the middle caudal rays and the interopercle; origin of anal about under middle of 

 the dorsal, distance between base of the last ray and the middle caudal rays five 

 and a half in the length; caudal rounded, about six in the length; accessory rays 

 well developed ; origin of dorsal over anus, its distance from the middle caudal rays 

 two in its distance from the snout; gill-membrane free to below the anterior spine 

 of the interopercle, without a free membrane across isthmus; both jaws with two 

 series of thin, chisel-shaped teeth. 



Color plain, without spots or stripes. 



29. Pygidium metae Eigenmann. (Plate XLVII, fig. 5.) 

 Pygidium metce Eigenmann, Proc. Am. Philos. Soc, LVI, Jan., 1918, p. 694. 

 13770, I. U. M., one, 78 mm. Barrigona. March, 1914. Manuel Gonzales. 



Head 6.3 in the length; D. 10.5; A. 9.5, counting the rudimentary rays; P. 6; 

 width of head nearly equal to its length; eye entirely in the anterior half of the 

 head, snout 2.75 in the head, interocular 3.5. Teeth conic. 



Nasal barbels reaching to tip of opercular spines, maxillary barbel slightly 

 beyond origin of pectorals; pectorals small, equal to the postorbital portion of the 

 head, the first ray with its filament equal to the head, origin of ventrals much nearer 



