5i 
REVISTA CHILKNA DE HISTORIA NATURAL 
background extends from the head to the caudal; another 
series above it; dark spots or vermicnlations above that. 
I. U. M. 15058, 55 specimens, largest 71 mm. long. 
The type has been figured. 
Named for Mr. Ernesto Maldonado, Director Bos- 
ques^ Pesca y Caza. 
Pygidium ChiJtoni, sp. nov. 
Head 6-7; depth 7.5—9; D. 14; A. 10. 
Eel-like, much compressed at caudal peduncle; outer 
maxillary barbel extending very little beyond the first 
interopercular spines; nasal barbel a little beyond eye. 
Depth of caudal peduncle 1.66-2 in the length of the head; 
width of caudal peduncle 3.5-4 in its detph; width of head 
about equal to its length behind the posterior nares, teeth 
conical, in narrow bands. 
Origin of dorsal equidistant from tip of caudal and 
some point ou anterior half of the head, its base equal to 
the head without the opercular spines; last anal ray con- 
siderably behind the vertical from the last dorsal ray, its 
distance from the caudal 3.75-4.25 in the length; caudal 
slightly emarginate; origin of ventrals nearer snout than 
caudal by one-third or one-fourth the length of the head; 
pectoral without a filament. 
Very numerous black spots of variable size, with 
yellow vermicnlations between. 
Vertebrae: coalesced 43+1? counted in two speci- 
mens. 
This species is very abundant in the Eio Nongen 
Concepción. It is more eel-like both in looks and movement 
than the other species of Pygidium of Chile. The distinc- 
tion is well marked in the adult, less so in the young. In 
general appearance it resembles Galaxius maculatus, a 
very different fish. 
I.U.M. 15059, many specimens, 35-170 mm. The 
type has been figured. 
Named for Col. M. A. Chilton, military attache of 
the American Embassy at Santiago, who toured the 
Switzerland of Chile with me. 
