320 MEMOIRS OF THE CARNEGIE MUSEUM. 



An obscure, dusky band along the middle of the sides; sides and back with 

 obscure spots about the size of the eye. 



38. Pygidium dorsostriatum Eigenmann. (Plate XLVIII, fig. 3.) 

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



695. 

 7093a-6, C. M.; 13810, I. U. M., four, 18-76 mm., the largest the type. Villavi- 



cencio. Manuel Gonzales. 



Distinguished by the eccentric, dark, lateral band. 



Head 5; D. 12.5 (of which 4 minute); A. 9.5; P. 9; center of eye very little in 

 advance of middle of the head, 25 interocular three in the head. Teeth conic. 



Nasal barbels extending to, or but slightly beyond, origin of pectoral; maxillary 

 barbel to the axil, equal to the length of the head; pectoral filament equal to the 

 length of the head, the longest ray equal to the length of the head behind the nasal 

 filament; origin of ventrals equidistant from base of middle caudal rays and base or 

 tip of the interopercular spines, ventrals nearly reaching the anal; origin of the anal 

 under the last quarter of the dorsal, the distance between the base of its last ray 

 and the base of the middle caudal rays about 4.5 in the length; caudal roimded, six 

 and five-tenths to seven times in the length; the first rudimentary dorsal ray over 

 the base of the ventrals, its distance from the base of the middle caudal ray equal 

 to its distance from the tip of the opercular spine, 1.47 in its distance from the snout. 



A dark band or row of spots from just above the gill-opening to the base of the 

 upper caudal lobe ; a few spots below the band in the front half of the body in the 

 larger specimen. 



This description is based on the two larger specimens, 68 and 77 mm. long. 

 The two smaller specimens, 18 and 21 mm. long, are uniform in color. 



39. Pygidium venulosum Steindaclmer. 

 Pygidium venulosum Steindachner, Anz. K. Akad. Wiss. Wien, 1915, No. XVII, 



p. 199 (Paramo de Cruz Verde, Eastern Cordilleras, Colombia, 3,000 M.) 



Habitat. — Eastern Andes of Colombia. 



I have not seen this species. 



D. 10 or 11; A. 10; P. 8. Caudal peduncle greatly compressed. Caudal 

 rounded; eye very small, a very little in front of middle of head. Barbels short, 

 about reaching eye; origin of anal under middle of dorsal; origin of dorsal equidistant 

 from tip of caudal and lateral margin of head; teeth pointed. First pectoral ray 



- In the plate the eye is placed too far forward; the anterior margin should be where the posterior 

 margin is. 



