394 EXPLORATIONS ACROSS THE GREAT BASIN OF UTAH. 



the genus Pcrca, all the species of which, he informs us, have naked heads. He sug- 

 gested for it a new genus, for which he proposed to give the name Lejiibema, in allu- 

 sion to the scaly bases of the unpaired fins. Lesueur subsequently sent to the Paris- 

 ian -Museum two specimens of a species which lie called I'crru multiliitcata, which 

 Cuvier and Valenciennes placed in their genus Labrax, adopting for it the specific 

 name of Lesueur. Their description is mostly comparative, it being said to differ 

 from the Labrax Uncut us by its higher body, shorter head, more feeble teeth, the 

 stronger asperities of the tongue, and especially the larger scales of the maxillaries, 

 which resemble those of Labrax mucrouatus, while in Labrax Jhteatus they were said to 

 be scarcely perceptible. 



The description of the lingual dentition is very unsatisfactory, and no correction 

 is made of the statement made in the second volume that the Labrax lineatus has only 

 lateral teeth. It is not so much in the development of the asperities of the tongue 

 that the lingual dentition of the species differs, as in that, while there are two narrow 

 rows separated by a mesial line in Pwccus li/tcatus, the rows are broader at the middle 

 in proportion, and coalescent in Roccus chnjsops. 



There were said to be in one specimen sixteen, and in another nineteen, longitu- 

 dinal dark lines. So large a number is rarely seen; the most constant arrangement is 

 five above, including the one through which the lateral line runs, while sometimes 

 there are several below the lateral line, and at other times they are obsolete. These 

 lines are sometimes straight, but often interrupted. 



In the "Fauna Boreali- Americana" of Richardson, a Labrax is described in the 

 volume on Ichthyology, under the name Labrax notatus (Smith), the Bar-fish, or 

 "Canadian Basse". This species is said to "differ from Mitchill's Basse (L. Uneatus, 

 Cuvier) in being much more robust, and in being marked with rows of spots, five 



five below the 





the same as the Perca MitchilU var. interrupts of Mitchill, but the comparison will 

 apply very well to Roccus clmjsops, and it is doubtless identical with that species. In 

 the remarks upon the species, it is said, by Dr. Richardson apparently, that "in the 

 more robust form, and in the strong scales of the head, the Canadian liar-fish resembles 

 the L. mucronatus of the United States and the West Indies, ami the /, multiUncutus of 

 the Wabash. The latter has sixteen narrow, black, longitudinal lines on the Hanks." 



