70 TELEOSTEI: ISOSPONDYLI. — XIU. 



4J; depth 3. D. 12. A. 28. Scales 5-56-7. L. 15. Great 

 Lakes and Mississippi Valley, abundant ; one of our most beautiful 

 fresh-water fishes. (Lat., polished.) 



bb. Belly nowhere carinate. 



162. H. selenops Jordan & Bean. Body elongate, less com- 

 pressed; eye very large, 2-| in head. Head 4^; depth 4. D. 12 

 A. 27. Cumberland R. to Ala. (a-eXrivt], moon ; &ij/, eye.) 



Family XXVin. ALBULID^E. (The Lady-fishes.) 



Body elongate, little compressed, covered with small, sQvery 

 scales ; head naked ; snout conic, pig-like, overhanging the small, 

 inferior mouth ; maxillary short, with supplemental bone ; preorbi- 

 tal very broad ; sides of upper jaw formed by maxillaries ; eye 

 large, with an adipose eyelid ; gill rakers tubercle-like ; preopercle 

 with membranous edge; vUliform teeth on jaws, vomer, and pala- 

 tines ; coarse blunt teeth on tongue and roof of mouth ; lateral line 

 present ; belly flattish, not carinate ; D. moderate, inserted before 

 V. ; A. very small ; no adipose fin ; C. forked. One species, in 

 most warm seas. 



68. ALBULA (Gronow) Bloch & Schneider. (Lat., white.) 



168. A. vulpes (L.). Lady-pish. Bone-fish. Macabi. 

 A band of elongate scales along middle of back; brilliantly silvery. 

 Head 3f; depth 4. D. 15. A. 8. Scales 9-71-7. L. 30. Warm 

 seas, N. to Cape Cod. (Lat., fox.) 



Family XXTX. BLOPID^. (The Tarpums.) 



Body elongate, more or less compressed, covered with silvery, 

 cycloid scales; mouth large, terminal, the lower jaw prominent; 

 maxillary long, of three pieces, forming side of upper jaw ; an elon- 

 gate bony plate between branches of lower jaw (as in Amia) ; bones 

 of mouth almost all with villiform teeth ; eye large, with an adipose 

 eyelid ; gill rakers long and slender ; belly not compressed, covered 

 with ordinary scales ; D. over or behind V. ; C. forked; no adipose 

 fin. Genera 2, species 4 or 5, in vparm seas. 



a. Body elongate, with small scales ; A. smaller than D. ; pseudobranchise 



present. {Elopinm,) Elops, 69. 



aa. Bed)' oblong, compressed, with very large scales ; no pseudobranchise ; 

 last ray of D. much produced. {Megalopinm.). . . Megalops, 70. 



69. ELOPS LinnEeus. (?Xo\^, name of some sea-fish.) 



164. E. saurus L. Tenpoundee. Silvery, darker above; gular 

 plate about three times as long as broad ; eye large ; tail very long; 

 C. deeply forked. Head 4J; depth 5^. D. 20. A. 13. Scales 

 12-120-13. L. 36. Warm seas, N. to Cape Cod; remarkable for 



