CLASS PISCES. 601 



Has a salient keel on each side of the tail, and the 

 lobes of its caudal almost equal. Its size has often 

 caused it to be confounded with the shark \ 

 Species uniting air-holes and an anal. 



Galeus 2 , Cuv., 



Have pretty nearly in all respects the form of the 

 sharks, but differ from them by having air-holes. 

 But one is known in our seas ; of middling size, and 

 to be recognized by its teeth, dentated only at their 

 external side. It is the Sq. galeus 3 , L., Bl. 118. 

 Duham. Sect. IX. pi. xx. f. 1 and 2. 



MUSTELUS 4 , Cuv., 



Present all the forms of carcharias and galeus ; but 



388, are nothing else but the Sq. nez, which has become very large, 

 whatever Bloch may say, Ed. de Schn. p. 132. The pretended jaws 

 of Carcharias, given by Aldrov. 382, are also those of the nez : it 

 appears more common than the true shark in the Mediterranean. 



1 Add the Beaumaris, (Sq. monensis, Sh.,) which has the muzzle 

 shorter, and the teeth more sharp. Isurus oxyrhynchus, Rafin. 

 Caratt. XIII. 1, may well be a species of this genus, perhaps even 

 the common species disfigured by stuffing. 



2 Galeus, the Greek generic name for the squali. 



3 It is also the Lamiola, Rondel. 377, copied, Aldrov. 394 and 

 393 ; Salv. 130. I. cop. Will. B. 6 1. If an enormous size has 

 been sometimes attributed to it, it is because they have referred to it 

 the jaws and teeth represented, Lacep. I. vii. 2, and Herissant, Ac. 

 des Sc. 174, but which come from a foreign species, which we shall 

 describe in our great work on ichthyology. 



" Mustelus is the Latin translation of yaXeot;, and generic for the 

 squali. N.B. M. Rafinesque unites ScyUium, Galeus, and Mustelus, 

 in his genus Galeus. 



