DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 415 
Messrs. Dow and Salvin have collected several examples, from 3 to 8 inches long, on 
the Pacific coast of Panama. 
The species described by Holbrook as &. maculatus, and said to have the dorsal 
spines separated from the soft portion, may eventually prove to be identical with the 
Pacific fish. 
19. MESOPRION ARATUS. 
Giinth. Proc. Zool. Soc. 1864, p. 145. 
D. ea «(AL L. lat. 45. L. transv. 43/12. 
The height of the body equals the length of the head, and is contained thrice and 
two-fifths, or thrice and one-fifth in the total (without caudal). The maxillary does not 
extend backwards to the vertical from the centre of the eye. Praoperculum finely 
serrated, with scarcely a trace of a posterior notch. Dorsal spines of moderate strength ; 
the third and fourth are the longest, two-fifths of the length of the head; the eleventh 
is scarcely longer than the tenth, which is rather more than half as long as the fourth. 
Caudal fin emarginate, two-thirds scaly; anal spines short, rather feeble, the third 
longer than the second, and equal in length to the last dorsal spine. Upper and 
lateral parts brownish-olive, each scale with a pearl-coloured spot, the spots forming 
together very distinct longitudinal stripes; no black lateral spot ; hind part of the root 
of the pectoral brown. Lower parts salmon-coloured. . 
We have six examples: two, 15 inches long, were collected by Mr. Salvin at Chiapam ; 
and four others were sent by Capt. Dow from the Pacific coast of Panama. 
21. APoGON DoVH. 
Giinth. Proc. Zool. Soc. 1861, p. 371. 
D.6|j. A.2. LL. 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 preopercular ridge is serrated. Dorsal 
fins nearly equal in height. 
The height of the body is one-third of the total length (without caudal); the leugth 
of the head two-fifths; eye large, its diameter being more than one-third of the length 
of the head. Palatine 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 the length of the head. Caudal fin 
slightly emarginate, with the angles rounded. 
Total length 26 lines. 
This species is so closely allied to A. inermis from the Mediterranean, that perhaps 
