70 TELEOSTEI: ISOSPONDYLL XIII. 



4; 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 4J ; depth 4. D. 12 

 A. 27. Cumberland K. to Ala. (o-eA^w;, moon ; aty, eye.) 



FAMILY XXVIII. ALBULID-^. (THE LADY-FISHES.) 



Body elongate, little compressed, covered with small, silvery 

 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; villiform 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.) 



163. A. vulpes (L.). LADY-FISH. 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 XXIX. ELOPID^J. (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 Amid) ; 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 warm seas. 



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

 present. (Elopince.) ............. ELOPS, 69. 



aa. Body oblong, compressed, with very large scales ; no pseudobranchiae ; 

 last ray of D. much produced. (Megaloplnae.). . . MEGALOPS, 70. 



69. ELOFS Linnaeus. (eXo^Jr, name of some sea-fish.) 



164. E. saurus L. TENPOUNDER. 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 



