CLASS PISCES. 499 



Achirus, Lacep., 



Are soles absolutely destitute of pectoral fins. 



They may be divided according as their vertical 

 fins are distinct, (the Achiri, properly so called '). 



Or, as they are united to the caudal, Plagusia, 

 Brown 2 . 



The third family, which we shall call 



DISCOBOLI, 



In consequence of the disk formed by their ventrals, 

 comprehends two genera not very numerous. 



Lepadogaster, Gouan., 

 Are small fishes, remarkable for the following cha- 

 racters. Their ample pectorals, descending to the in- 

 ferior surface of the trunk, receive stronger rays, fold 

 a little in front, and unite one to the other under the 



exist, some bf which are doubtless confounded among the achiri of 

 authors. The PL trichodactylus must also belong to them. Add 

 the Pegouzeoi Risso 308. 2nd edit. f. 33. ; the Mon. theophile, Id. 



1 PL achirus, L., Achire barbu, Geoff. Ann. du Mus. tome T. pi. 

 xi. It is not the same as that of Lacepede. It is essential to re- 

 mark, that its barbs are not rays, but cilias, as is the case in the 

 common sole, and as is found in several achiri ; the Ach. marbre, 

 Lacep. III. xii. 3. and IV. p. 660; Ach.fasce, Id. ; PL lineatus, 

 Sloane, Jam. pi. cccxlvi. ; PL mollis, Mitch, ii. 4. 



2 PL bilineatus, Bl. 188., or Jerre potoo, E. Russel 74. ; V Ach. 

 orne, Lacep. iv. p. 663.; Pleur. arel, Schn. 159.; PL plagusice, 

 aff. Jam. Brown 445., different from PL plagiusa, L. ; PL potous, 

 Cuv., or Jerreepotoo, D. Russel 73. 



Kk 2 



