to that genua as now restricted 



Mr. Hill, of Jamaica, in a useful catalog of the fiflhftfl of tl 



noticed a fish which he referred to Luhru, under the name of /,. pfa 



weather Chub. It is said by that gentleman to be confounded by 



the Lnhrax mucrmata* l=Mar<»ie amcrhana of this article), hut di 



Gknts ROCCUS, (Mi 



Lahrarrs with pccthtatrd prropcrcHlum, cycloid or nuprrf* rth, rtmoitt chnk owl opercular 



The body is elongate, subfusiform or oblong-ovate, compressed, and with the hack 

 anteriorly curved. 



The head is compressed, laterally oblong conic. The < .pereulum is armed with two 

 spines, the upper of which is small; the preoperculum pectinated both behind and 

 below; the suborbital bones entire. The muciferous cavities of the lower jaw are not 

 very evident. 



Teeth on the intermaxillary, dentary, palatine, and vomerine hones villifbrm; 

 those on the tongue present in a band along the lateral margins, and in two longitu- 

 dinal rows, or an elongated oval patch at the base. Interbranchial osselets smooth. 



The scales are ctenoid on the body, but on the head, from the nape to the nostrils, 

 and on the cheeks, are mostly cycloid. 



The lateral line is straight and continuous to the base of the caudal hm 



The dorsal fins are not united by a perceptible membrane: the anterior Jin has 

 nine spinous rays; the second is oblong, with one spinous, and from eleven to Fourteen 

 branched ones. 



The anal fin is opposite the second dorsal, and has three spinous rays regularly 

 increasing in size. 



The caudal is emarginate. 



The skull has the brain-case with nearly flat sides below, rectilinear and flat toward 

 the aperture for the last two branches of the fifth nerve, a vacuity on each side between 

 the basioccipital and alispheroid bones, and the postfrontals laterally well developed 



The genus Roccus is very closely allied to both Lahrax as now restricted as well 

 as to Morone From Labrax, it differs chiefly in the character of the armature of the 



