2. AGONOSTOMA. 465 



Fresh waters of San Domingo and probably of Jamaica. Nine 

 inches long. 



a. Adult female. kSan Domingo. Purchased of Mr. Cuming. 



b-e. Adult and half- grown: sjiins. Jamaica? From Dr. Parn ell's 



Collection. 

 /. Adult. West Indies. Presented by the Medical Officers, 11. A., 



at Fort Pitt. 



♦ 



Description. — This species is nearly allied to A. monticola, from 

 which it may be readily distinguished by the cliaracters mentioned ; 

 it is necessary, however, to give a more detailed description, as 

 probably more spcsies will be discovered. The body is moderately 

 compressed, with the upper anterior profile considerably arched ; its 

 greatest depth is below the origin of the spinous dorsal, where it 

 is contained four times and a third or four times and a half in the 

 total length. The length of the head is nearly equal to the height 

 of the body, or contained three times and two-thirds in the total 

 length, the caudal fin not included. The interorbital space is quite 

 flat, its width being rather more than that of the orbit, which cciuals 

 the extent of the snout, and is one-fourth of the length of the head. 

 The snout is compressed, with thin lips, and with the cleft ot the 

 mouth horizontal • the maxillary extends beyond the vertical from 

 the anterior margin of the eye. The nostrils are close together, the 

 anterior being on the middle between the end of the snout and the 

 orbit. There are four series of scales between the orbit and the angle 

 of the praeoperculum, sixteen between the snout and the spinous 

 dorsal fin. The latter commeHces midway between the snout and 

 the base of the caudal, above the tenth scale of the lateral line ; the 

 length of its anterior spine is more than one-half of that of the head. 

 The soft dorsal is as high as the spinous, and commences above the 

 twenty-second scale, or above the third soft ray of the anal. Caudal 

 deeply emarginate ; anal higher than the dorsal opposite. The pec- 

 toral is inserted above the middle of the depth of the body, and ex- 

 tends to the ninth scale of the lateral line ; it is as long as the head, 

 the length of the snout not included ; the ventral is somewhat shorter 

 than the pectoral. 



Nearly uniform greenish (in spirits) ; blackish blotches between 

 the dorsal spines. 



Length of a mature female six inches ; the species, however, at- 

 tains to a larger oize. 



9. Agonostoma forsten. 



Mugil albula, Forst. Descr. Anim. ed. Licht. p. 145. 



forsten, Bl. Schn. p. 120 ; Cuv. 8f Val. xi. p. 141 ; Michanh. Voy. 



Ereb. <^ Terr. Fishes, p. 77. pi. 44. figs. 20-26 (young). 

 Dajaus diemensis, Richards. Proc. Zoul. Soa. 1840, p. 25, and Trans. 



Zool. Soc. iii. p. 123, and Voy. Ereb. ^' Terr. Fishes, p. 37. pi. 26. 



tigs. 1-4 ; Jenyns, Zool. Beagle, Fishes, p. 82. 



D. 4 U. A. ^. L. lat. 55. Ctec. pylor. 3. 



I 10 12 ^ •' 



Narrow bands of villiform teeth in the jaws, on the vomer, on the 



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