106 FISHES. 



Ch m.< lis, Cuv., 



Have tin- same form of mouth, and the same trenchant and notched teeth 

 as in the prec( ding ubgenua, but the body is oblong and neither carinated 

 in, i dentated; eery small, round teeth in the maxillaries*. 



Myi.i;tj;s, Cuv. 



These flshei are remarkable for their very singular teeth, which re- 

 semble short triangular prisms, rounded on the ridge, and excavated on 

 tin' superior surface of the crown by mastication, so that three salient 

 poin! are formed there hy the three angles. There are two ranges of 

 i )i< < in ill in the intermaxillaries of the slightly cleft mouth, and a single 

 on.- in the lower jaw, with two teeth behind; tin' palate and tongue, how- 

 ever, are smooth. The maxillaries placed on the commissure have no 

 teeth. 



Borne of them have the elevated figure, the falciform vertical fins, for- 

 ivardly inclined spine, and even the trenchant and notched abdomen of 



tin- Serra-salmi, to which, hut for their teeth, we should certainly unite 



iln in. One of them even has a horizontal spine in front of the dorsaly, 

 Very large om , whose flesh is much esteemed, an- found in America^. 

 Others have an elongated form, 'lie first dorsal being opposite to the 



interval between the ventral:; and the anal. The species known arc only 



found in Egypt §. 



1 1 n DBOC1 on, ' 'in ., 



Have the end of tin- snout formed h\ the intermaxillaries; the maxillaries 

 commencing neat the eyes, oi before them, and completing the upper jaw. 



The tongue and vomer always smooth, hut hoth jaws are furnished with 



conical teeth; a large suborbital, thin and naked like the operculum, 



COVerS tin- (heck. 



Some of them have a compact i ; 1 1 1 ;• < • of small teeth in the maxillaries 

 and palatines, their fust dorsal corresponding to the interval hetueen tin- 



ventials and anal||. They inhabit rivers in the torrid /om-; their flesh 

 resembles that of the Carp^J. 



Others have a double row of teeth in their intermaxillaries and lower 



jaw, and a single one in the inaxillai ies ; hut (heir palatines have none. 



Their first dorsal is above the ventrals**. 



* Chalcetu maorolapldotun, Cuv., Mem. Mus, IV, pi. Kxi,f. I; Ch, opalinut, Id., 

 Hi. \ ; pi. x.wi, f. I , Ch. angulatus, 8pix, \\\l\. 



| Myleteh rhombviidalia, Cui , Mem, du Mus. IV, pi. ^\ii, f. 3. 



j Add in the preceding species, Myl durioentria, lb., I '.'. ■'/. braohypomus, lb., 

 I'. I , ,1/. maoroputnus, ll>., pi, icxi, f.3| - M.paoo, llumli. Zool.Obe. II, pi. xlvii, f, '1. 



(j The Rati of the Nile, which la the Cyprinm duntex, I.., Mus. A<l. Fred, and ed. 

 \ il. or the Sultno denU r, Ha selq , and! the s. nlloticua, [Torek., and whioh is thus 

 twioe Pound in Gmelin and Ilia auooeaaors, li is die Myt. Haaaelquietli, Cuv., Mem. 

 Mn a IV, pi, icxi, f. '2. 



|| It is I'm iln* reason thai M. de Laoepdde plaoed them among the Osmeri, 



^| Salmo faloatua, B1.383| S. odoe, Id. ;>sii, Hydrooyon fuloiroatrtt, Cuv., Mem. 

 Mm \ . p] i'.ii.i'. I; ffyd, hvpsetus, Cuv,, or Hydr. jauollh, Zool. Voj deFreyoin., 

 pi, is, i. J, 



** A new species from Brazil, ill,- Hydioe, breoidem, (\i\., Mian. Mus. V, nl. tcxvli, 

 f. l, in Charaoluus amattonicus, Spix, X XXV, 



