SPANISH MACKEREL. 



The figure of this fish at the head of the page is from 

 the first plate quoted. 



Dr. Turton states, that the species he has described under 

 the name of the Coly Mackrel is found frequently in the 

 rivers about Swansea, and seldom exceeds six or seven inches 

 in length : he also adds, that it is varied with rich green" and 

 blue ; spurious fins five above and below. Although Dr. 

 Turton has called his second species of Mackerel S. colias, 

 it is possible that his fish may prove to belong to a third 

 species, which also occurs in the Mediterranean. Cuvier 

 and M. Valenciennes have described a species of Mackerel 

 of small size, which is decidedly more green in its colour, has 

 five spurious fins above and below, and seldom exceeds 

 eight or ten inches in length. Mr. Couch describes S. colias 

 as possessing six spurious fins above and below. 



The name of this small-sized species of Mackerel is S. 

 pneumatophorus ; so called by M. Laroche, on account of its 

 possessing a swimming-bladder. S. colias is also provided 

 with a swimming-bladder : the common Mackerel, S. scom- 

 brus, Linn, is, as before mentioned, without any. 



