291 



Jack. This last term is probably a corruption of 

 cavalho, and may find an analogy in our " Horse 

 Mackarel," an epithet by which a British species of 

 the same genus is familiarly distinguished. 



Some very little fishes are common in the same 

 situations as those above described, which go by the 

 name of Fry, but consisting of two species, so much 

 alike, on a cursory examination, as to be readily con- 

 founded. They are all of about the same size, two 

 inches and three-fourths in length, of a greyish, pel- 

 lucid appearance, with the cheeks and gill-covers, and 

 a broad band running down each side, silvery. Some, 

 which have the mouth and gill-opening enormously 

 wide, are a small kind of Anchovy [Etigraulis Brownii). 

 The others belong to another genus, and constitute, 

 I believe, a new species of Clupea, remarkable for 

 the great length of the head in proportion to the 

 body.* It is a curious circumstance that fishes of 

 different genera should associate together in shoals ; is 

 it on account of their close resemblance in form, size, 

 general appearance, and colour ? 



* The Silver-banded Herring. Clupea lamprotcenia, mihi. (Aa/xirphs, 

 resplendent, raivia, a ribbon or band.) Head one-fourth of total 

 length, and nearly twice the vertical diameter of the body ; back 

 nearly straight : belly very slightly arched : body but slightly com- 

 pressed : belly not serrated. Fin-rays, D. 13; A. 13; C. 24; 

 P. 13 ; V. 8. Length two inches and three fourths. Irides silvery. 

 Body pellucid, greyish ; a broad band of rich silver runs along each 

 side from the operculum to the base of caudal : cheeks and gill covers 

 silvery: fins grey, transparent. (Plate I. fig. 2.) 



I find teeth certainly on the intermaxillaries, and, I think, in a band 

 on the vomer ; hence I consider it a Clupea, as restricted by Cuv. and 

 Val. ; but from the minuteness of the specimens it is difficult to 

 ascertain this point with accuracy. 



