16 ANIMAL RESOURCES OF THE UNITED STATES 



39. NEMATOGKATHI. (Cat-fish, "bull-heads," &c.) 



Useful products : 

 Food. D. 1. 

 Guano, (cat-fish.) D. 31. 



40. APODES. (Eels, congers.) 



Useful products : 

 Food. D. 1. 

 Bait, eel-skins. D. 5. 

 Leather, (eels.) D. 20. 



41. CYCLOGANOIDEI. (Mud-fish, or amia.) 



42. IiH0MB0GAI^I01DEL (Gar-pikes.) 



Useful products : Scales, used for arrow- tips. D. 14. 

 Injurious traits : Enemies of other fish. 



43. SELACHOSTOMI. (Paddle-fish, or spoon bill) 



44. CHO]!TDROSTEI. (Sturgeons.) 



Useful products : 



Foods : Fresh. D. ] . 

 Smoked. D. 1. 



Eggs, pickled, (caviare.) D. 3. 

 Chorda-dorsalis. dried, (veziga.) D. 2. 

 Isinglass, (sturgeon.) D. 24. 

 Oil. D. 27, T. 

 Scales. D. 14. 

 Useful traits : Scavengers. 

 Injurious traits : Said to destroy eggs of white-fish. 



VI. ELASMOBRANCHIATES. 



45. HOLOCEPHALI. (Ohirasera, or king of the herrings.) 



46. EAI^. (Skates, rays, "devil-fish.") 



47. SQUALL (Sharks.) 



Useful products : 



Food, (sharks, skates.) D. 1. 



Bone, (sharks.) D. 9. 



Oil, livers, (sharks, rays, &c.) D. 27. 



Shagreen, (sharks.) D. 20. 

 Injurious traits: Enemies of man and fishes. 



