148 DR. A. GUNTHER ON GUATEMALAN FISHES. [Mar. 22, 
notched, with the soft portion very low; its spines are moderately 
strong, the fourth is the longest, not quite half as long as the head. 
Anal spines strong ; the second is longer and stronger than the third, 
and equal to the eighth of the dorsal. The soft vertical fins enve- 
loped in scales; caudal forked, with the upper lobe longest. The 
pectoral fin does not extend to the vent. Greenish olive above, each 
seale with a pearl-coloured centre; sides silvery; a blackish spot 
above in the axil. 
One specimen, 12 inches long, was obtained by Messrs. Dow and 
Salvin on the Pacific coast of Panama. 
UpENEUS TETRASPILUS, 
D. 8|9. A. 7. L. lat. 33.  L. transv. 2/6. 
The height of the body equals the length of the head, and is con- 
tained thrice and two-fifths in the total (without caudal) ; the width 
of the interorbital space is two-thirds of the length of the snout. 
Teeth in both jaws in two series, the outer series of the upper jaw 
being formed by very obtuse and partly confluent teeth. The max- 
illary is dilated and rounded behind, and bent upwards into a sort of 
hook ; the barbels extend to the vertical from the root of the pec- 
toral. The third and fourth dorsal spines are subequal in length, 
longer than the second, and nearly three-fourths of the length of the 
head. Greenish olive above, each scale above and below the lateral 
line with a large pearl-coloured spot ; sides yellow; a rose-coloured 
band on each side of the belly. A large blackish blotch on the 
lateral line, behind the hind part of the spinous dorsal fin. A second 
smaller blackish spot behind the orbit ; the latter is sometimes very 
indistinct. 
Two specimens, 81 inches long, were collected by Messrs. Dow 
and Salvin on the Pacific coast of Panama. 
This species would belong to the division which has been called 
Mulloides. 
PoLYNEMUS MELANOPOMA. 
Dye AL oe ola lab. oe 
Nine free pectoral appendages, the longest of which extends to 
the vent. Preeoperculum finely serrated, with a small spine above 
the angle. The vomerine teeth form a rounded patch; the band of 
palatine teeth is as broad anteriorly as the front part of the inter- 
maxillary band. Operculum black. 
A single specimen, 15 inches long, was obtained by Mr. Salvin at 
San José. 
UMBRINA ELONGATA. 
Dy: 10|55- A. 1/7. L. lat. 70. L. transv. 7/22. 
The height of the body is contained four times and a third in the 
total length without caudal, and five times if the caudal is included ; 
the length of the head is two-sevenths of the total, or one-fourth if 
