Dr. A. Giinther on Central-American Fishes, 327 
9. macrocephalus, n. sp. 
10. Auchenopterus monophthalmus, n. sp. 
11. Mugil proboscideus, n. sp. 
12. Myxus harengus, n. sp. 
13. Fistularia tabaccaria, L. 
14. Halicheres, sp—The species appears to be new; but the 
single specimen sent is in too bad a condition to admit of a descrip- 
tion. 
With the exception of the first species, the others are included 
in my ‘ Catalogue of Acanthopterygian Fishes,’ vol. iii., for which the 
following accounts have been prepared. 
Arvocon Dovit. 
D. 6 | s A.=. L. lat. 25. L. transv. 3/9. 
A roundish black spot on each side of the root of the caudal; the 
spinous dorsal colourless, transparent ; uniform olive (in spirits). 
Head densely punctulated with brown. Only the hind margin of 
the posterior preeopercular ridge is serrated. Dorsal fins nearly 
equal in height. 
The height of the body is one-third of the total length (with- 
out caudal), the length of the head two-fifths; eye large, its dia- 
meter being more than one-third of the length of the head. Pala- 
tine and vomerine teeth present. The upper jaw overlaps slightly 
the lower ; maxillary extending backwards to below the posterior 
third of the orbit. Operculum with an upper flexible point, and 
with a lower stiff spine. The third dorsal spine is a little longer than 
the second, one-half of the length of the head. Caudal fin slightly 
emarginate, with the angles rounded. 
_ Total length 26 lines. 
This species is so closely allied to 4. inermis, from the Mediter- 
ranean, that perhaps it would be better not to separate it; the only 
difference which we can find is the form of the soft dorsal fin, which 
is considerably higher than the spinous in the Mediterranean species. 
GoBIUS PARADOXUS. 
D.6| 11. A.9. L. lat. 14. 
The head and the trunk are entirely naked to between the second 
dorsal and the anal, the remainder is covered by ctenoid scales of 
moderate size; there are nine or ten of them in one of the anterior 
transverse series. The height of the body is contained five times and 
two-thirds in the total length, the length of the head four times and a 
quarter. Head nearly as broad as high, its width being rather more 
than one-half of its length. Eyes rather close together, of moderate 
size. Snout obtuse, rounded, as long as the eye; cleft of the mouth 
slightly oblique, with the jaws equal in length, and with the max- 
illary extending to below the middle of the eye. Teeth in villiform 
bands ; there are two curved canine teeth on each side of the lower 
jaw. The first dorsal spine is elongate, filiform, sometimes extending 
to the base of the caudal ; caudal rounded, shorter than the head ; 
none of the pectoral rays silk-like ; the ventral-terminates at a great 
24° 
