CAEANGID^. — LVI. 109 



6- Body subfusiform, the depth less than J the length; breast scaly; no 

 canines; scutes numerous, 40 to 50. 



278. C. chrysos (Mitchill.) Hard-tail. Yellow Mackerel. 

 CojiNERA. Greenish, yellow below; a black blotch on opercle; 

 none on P ; breast scaly ; arch of lateral line about half straight 

 part. Head 3|; depth 3{. D. VIII- 1, 24. A. II, 1, 19. Scutes 

 50. L. 18. Cape Cod, S., rather common, {xpvaos, gold.) 



66. Body oblong-ovate, the depth more than J the length; outer teeth 

 stronger; scutes larger, 26 to 30; silvery species. 

 c. Breast entirely scaly ; opercular spot inconspicuous; lower jaw with- 

 out distinct canines. 



279. C. latus Agassiz. Jurel. Pectoral spot usually wanting. 

 Head 3|; depth 2|. D. VIII-1, 22. A.II-1, IG. Scutes, 30. 

 L. 18. Warm seas, rarely N. (Lat., broad.) 



cc. Breast naked, except a small rhombic scaly area before V. ; lower 

 jaw with two small canines; adult with a large black spot on 

 opercle, and one towards base of P. 



280. C. hippos (L.). CREVALLt. Cavalla. Head large 

 and deep, especially in adult, mouth large. Head 3^ ; depth 2^ to 

 3. D. VIII-1, 20. A. 11-1,17. Scutes 25. L. 36. Warm seas, 

 N. to Cape Cod ; common S. (ittjtos, horse.) 



aa. Teeth of jaws equally small ; breast naked, spinous dorsal disappearing 

 with age ; soft dorsal and anal with 3 to 6 anterior rays produced in 

 long filaments. {Alectis Rafinesque.) 



281. C. gallus (L.). Thread-fish. Body very deep, broadly 

 ovate, its edges trenchant ; scales minute ; scutes very feeble ; sil- 

 very, darker above ; a dark blotch on opercle ; changes greatly with 

 age. Head 3; depth 2 (young as deep as long). D. VI -1, 19. 

 A. 16. Scutes 9 to 12. L. 2 feet. Warm seas, N. to N. Y. (The 

 American fish, called Caranx crinitus Mitchill, seems to be the same 

 as the East Indian C. gallus.) (Lat., cock.) 



136. VOMER Cuvier. (Lat., ploughshare.) 



282. V. setipinnis (Mitchill). Moon-fish. Horse-fish. Body 

 oblong, excessively compressed, but less elevated than in C. gallus 

 or in Selene vomer: fins in adult all very low, none filamentous; 

 head very gibbous above eye ; scutes minute. Head 3^ ; depth 2 

 (deeper in young). D. VIII-1, 21 to 25; A. II- I, 18 to 20. 

 L. 18. Tropical America, N. to Maine. (Lat., seta, bristle; 

 pinna, fin.) 



137. SELENE Lacdpfede. (aeX^vTi, the moon.) 



o. D, with 22 soft rays ; A. with about 18; anterior profile of head from base 

 of snout to occiput almost straight, the bones of the head being much 

 distorted. 



