SCOMBERIDiE. XIPHYINiE. 259 



opening beneath the eye ; first dorsal fin very long ; 

 tail not carinated ; anterior teeth longest. 

 T. lepidopoides. Cuv. and Val. pi. 220. 



Gempylus Cuv. Body much elongated; head, jaws, 

 and teeth as in Thyrsites, but without palatine teeth ; 

 ventral fins very minute, placed before the pectorals ; 

 lateral line curved, and marked with large scales; 

 pectorals falcate. 



G. Promethsus. Cuv. and Val. pi. 222. 



Zyphothyca Sw. Body very long, linear, and gTeatly 

 compressed; lateral line straight, simple; mouth open- 

 ing before the eye ; the lower jaw much the longest, 

 with the chin elongated and pointed ; ventral fin 

 minute, of two little rays, placed behind the pectorals 

 which are oval. 



Z. coluber Sw. Cuv. and Val, pi. 221. 



3. SuBFAM. XIPHYIN.S Linn. Sward-fish. 



Upper jaw excessively prolonged, considerably flattened 

 above, the edges sharp ; the mouth is placed beneath ; 

 ventral fins either wanting, or of a single inflexible 

 bone in each ; branchial arches two, not pectinated. 



XiPHiAS Linn, Ventral fins none ; tail singly carinated 

 on each side. 



Z. gladius. Cuv. and Val. pi. 225, 226. 



Tetrapterus Raf. Body nearly cylindrical; snout 

 narrow ; ventral fins with a single bony ray ; tail 

 doubly carinated on each side ; dorsal fin very long, 

 falcate near the head ; eyes large. 



H. belone. RafF. Caratt. p. 54. pi. 1. fig. 1. 



HiSTioPHORUs Cuv. Ventral fins of two unequal rays, 

 connected by a membrane ; mouth opening behind 

 the eye, which is very large ; caudal fin small, lobed. 

 H. pulchellus. Cuv, and Val. 230. 



Zanclurus Sw. Body with hard oblong scales ; ven- 

 tral fins of two long equal rays ; eyes very small ; 



