Dr. A. Giinther on Central-American Fishes. 331 
: 
M. proboscideus. 
laterally ; the papillee are arranged in oblique series, having a pave- 
ment-like appearance. The lower jaws are rather narrow, and the 
cleft of the mouth is much longer than broad. The maxillary is 
entirely hidden by the preeorbital, which has the extremity truncated 
and minutely serrated. The eye is much shorter than the snout, and 
in the present specimen, which apparently is a young one, one-fourth 
of the length of the head. There are twenty-three scales between 
the snout and the spinous dorsal fin. The latter commences somewhat 
nearer to the base of the caudal than to the end of the snout: the 
soft dorsal and the anal have series of small scales between the rays ; 
the former is higher than the spinous dorsal, and commences above 
the middle of the anal fin. Caudal emarginate ; the anal is rather 
higher than long, as high as the soft dorsal. The pectoral is inserted 
above the middle of the depth of the body, and its length is four-fifths 
of that of the head. 
Silvery, upper parts greenish ; dark stripes along the series of scales, 
Myxvus HARENGUS. 
D.4|4. A. i L. lat. 38. 
A single series of small fixed teeth in the upper jaw, none in the 
lower or on the vomer; lips thin. Preorbital serrated anteriorly 
and inferiorly. Anterior dorsal spines of moderate length, half as 
long as the head. 
ead and body are compressed, the greatest depth being about 
one-fifth of the total. The cleft of the mouth is rather broader than 
deep, and does not extend to the anterior margin of the orbit. Sides 
and belly bright silvery ; back green. 
