new South-American Fishes. 629 
Total length 115 mm. 
One specimen from the Rio Sapayo, N.W. Ecuador. 
This species is allied to A. ceruleopunctata, Stdr., which 
has a smaller eye and shorter caudal peduncle. 
Gobius (Awaous) Guenthert. 
Gobius transandeanus (part.), Giinth. Cat. ii. p. 62 (1861). 
Depth of body 64 times in the total length, length of head 
3 times. Breadth of head 1% times in its length, depth of 
head 2} times. Diameter of eye 64 times in the length of 
head, length of snout 2} times, length of maxillary twice. 
Maxillary extending to the vertical from the anterior margin 
of the eye. Osseous interorbital width 2-2 of the diameter of 
eye. Scales ciliated, 60-63 in a longitudinal series, 17-18 in 
an oblique series from the origin of the second dorsal back- 
wards to the anal, about 30 in front of the first dorsal. 
D. VI, 1 10, the spines of the first fin more or less produced, 
the second and third the longest; distance from origin of 
first dorsal to posterior margin of eye equal to the distance 
from that point to the tip of snout ; rays of the second dorsal 
subequal, half the length of head. A. I 10, the length of the 
rays 23-22 times in that of the head. Pectoral pointed, its 
length 12-13 times in that of the head. Ventrals extending 
2 of the distance from their base to the origin of anal. 
Caudal rounded. Head and upper part of body spotted or 
marbled with dark brown; second dorsal with longitudinal, 
caudal with vertical dark lines; pectoral with a dark bar on 
the base of the upper rays; ventrals and anal blackish. 
Total length 140 mm. 
Two specimens from Western Ecuador. 
It is here desired to restrict the name G‘. transandeanus to 
a species which differs from the above notably in the following 
features :—Length of head 3} times in the total length. 
Length of maxillary 2? times in that of the head, length of 
snout 22-22 times. Maxillary not reaching the vertical 
from the anterior margin of eye. 35-40 scales in front of 
the dorsal. Distance from origin of dorsal to posterior 
margin of eye 1} times the distance from that point to the 
tip of snout. Ventrals and anal pale. 
This diagnosis is based on four specimens from W. Ecuador, 
measuring up to 175 mm. in total length. 
G. Guenthert is closely allied to G. latus, O'Shaughnessy, 
which is distinguished by the fewer scales. This latter 
species is not a synonym of G. banana, C. & V., but is the 
one which American authors have identified with G. flavus, 
Ann. & Mag. N. Hist. Ser. 7. Vol. xii. 41 
