PERCOIDE.E. 



23 



Dimensions. 



Inches. Lines. 

 Length from tip of snout to extremities of 



caudal fin ..... 9 



„ „ end of scales on caudal 7 10 



„ „ anus ... 4 2 



„ „ beginning of anal . 4 9£ 



„ „ first soft ray of anal 5 7 



„ „ last ditto, ditto . 6 3£ 



„ „ beginning of dorsal . 3 4 



,, „ first soft ray of ditto 5 5 



n „ last ditto, ditto . 6 2 



„ „ orbit ... 8 



„ „ tip of gill-cover . 2 8 



„ of chin to ditto .... 2 11 



„ orbit 8 



„ vertical diameter of orbit 7J 



„ intermaxillary ... 1 



labial 1 



Inches. Lines. 

 Length of lower jaw to its articulation with 



the preoperculum .... 1 4 



„ attachment of whole dorsal . 3 8^ 



„ „ spinous part of ditto 2 4 



„ highest dorsal spine . . 9 



„ „ soft rays . . 1 4 



„ attachment of anal ... 2 1 



„ „ of soft rays of ditto 1 



„ soft rays of anal ... 1 5 



„ pectorals .... 1 6 



„ ventrals .... 1 5 



„ caudal from scales on longest rays 1 6 



„ ditto from origin of longest rays 1 10 



„ central rays of caudal from their base 1 6 



Greatest height of body .... 3 8 



Vertical diameter of tail ... 1 



Distance between anus and first anal spine 6 



M. Le Sueur has described, in the Journal of the Philadelphia Academy of 

 Sciences, two Lake Erie fish, which he associates with his Cichla cenea, the Cen- 

 trarchus aneus of the preceding article. The presence of palatine teeth excludes 

 them from Pomotis, but as he does not mention whether the tongue be toothed or 

 not, nor the presence of serratures on the preoperculum, it is impossible to say 

 whether they belong to Centrarchus or Bryttus, or even to the same group. We 

 abridge M. Le Sueur's descriptions. His first species resembles Pomotis Catesbei 

 (Cuv. et Val.) in the streaks on the gill-covers, but differs from it in its palatine 

 teeth, and from all the species of the group described in the Histoire des Poissons, 

 in its transverse bands on the sides. 



Cichla fasciata. (Le Sueur.) 



Form. — Body compressed, tapering at the two extremities, three and a half times as long 

 as the head, by one length in depth. Head narrow, scaleless between the eyes and upon the 

 snout, which is short. Jaws large, truncated posteriorly, intermaxillary long and narrow. 

 Inferior jaw hardly longer than the superior one, mandible strong, enlarged, spoon-shaped. 



Teeth very small, numerous, card-like on the jaws, palate, and extremity of the vomer. 



Fins.— £r. 6; P. 18 to 20 ; P. 5; D. 10/15; A. 3/12; C. 17 8 . 



Dorsal Jin high, rounded behind, arched before, and very low at its junction with the soft 

 part. Anal rounded shorter than the soft part of the dorsal. Caudal slightly emarginated 

 with rounded lobes. 



Scales rounded, not toothed, rather irregularly placed, large on the sides, smaller on the 

 back, small on the back of the neck, very small under the belly, on throat and cheek, and a 



