PISCES. 317 



in both jaws, as well as on the vomer, palatines, tongue, 

 pharyngeans, and branchial arches : one dorsal ; the 

 anal opposite. 



j. ^ <j 



anal opposite 



38. BELONE Snout attenuated, greatly prolonged: 



intermaxillaries forming the entire margin of the upper jaw : 

 both jaws with small teeth ; none on the vomer, palatines, 

 or tongue : body elongated : a row of carinated scales along 

 each side of the abdomen. 



(1. BELONE.) Dorsal and anal entire. 



(2. SCOMBERESOX.) Last rays of the dorsal and anal detached, form- 

 ing spurious finlets. 



39. EXOCOETUS. Head depressed, scaly : intermax- 

 illaries without pedicles, and forming the entire margin of 

 the upper jaw : both jaws with small teeth : branchioste- 

 gous membrane with ten rays : a row of carinated scales 

 forming a projecting line along the bottom of each flank : 

 pectorals extremely large, almost as long as the body. 



SIL URIDJE. No true scales : skin naked, or 

 covered with osseous plates : adipose Jin often pre- 

 sent : upper jaw formed by the intermaxillaries : 

 Jirst ray of the dorsal and pectoral Jins generally 

 a strong articulated spine. 



(2.) SILURUS. Skin naked, covered with a mucous secretion : head 

 depressed : mouth terminal ; with several fleshy barbules : card-like teeth 

 in both jaws, as well as on the vomer : dorsal small, without any sensible 

 spine : anal very long. 



III. SALMONID^. Body scaly: two dorsals; 

 the first with all the rays soft; second small., 

 and adipose. 



40. SALMO The greater part of the upper jaw 



formed by the maxillaries : one row of sharp teeth on the 

 maxillaries, intermaxillaries, palatines, and mandibulars ; 



