REVIEW OF LOCAL FISHES 



75 



and the ventral fins elongate. The Lookdown has the anterior profile 

 almost vertical, the distance being excessive from its nape to the mouth 

 below. The third species, the Threadfish, is rather circular in outline 

 with dark bands on the sides, the anterior rays of dorsal and anal fin 

 indefinitely prolonged into thread-like lashes. 



Aside from those already mentioned, six species of this family have 

 a place in our local fauna. The Leatherjacket can be recognized by its 

 peculiar very silvery hide marked with short longitudinal grooves formed 

 by the fusion of its scales. It is perhaps the most maokerel-like in the 



LEATHERJACKET 



family. The posterior rays of its dorsal and anal fins are isolated resem- 

 bling a mackerel's finlets and are merely connected at the base by a low 

 membrane. It is a small species occurring occasionally in summer. 

 The Runner, of accidental occurrence here, is a large offshore 



