during his.refidence in Holland, in 1738. This 

 method, which took in the Cetaceous order, 

 now among the MAMMALIA, and the Nantes, 

 now referred to the AMPHIBIA, was eftablifhed 

 on the ftrudure or rather fituation of the tails in 

 the cetaceous order ; and in others, on the difference 

 in the gills, and the rays of the fins, whether r^r* 

 tilaginous or bony. In the two laft editions, ano- 

 ther difpofition is attempted : after having dif- 

 rniffed the cetaceous order to the Mammalia, and the 

 Chondropterygii or Cartilaginous Fifhes, and 

 the Branchiojlegi to the Nantes, our author forms 

 four orders of the bony fifhes (which refpire by 

 means of gills only) from the fttuation of the 

 'ventral fins; which he analogically confiders as 

 the feet of the animal, according as they are 

 placed either before, under, or behind the perioral 

 or gill fins, or as in one order wanting the 

 ventral fins. 



I. APODES. Apodal. Fifhes deftitute of ven- 

 tral fins. 



II. JUGULARES. Jugular. Fifhes having 

 the ventral fins placed before the peroral fins, 



III. THORACICI. Thoracic Fifhes hav- 

 ing the ventral fins placed underneath the pec- 

 toral fins. 



IV. ABDOMINALES. Abdominal. Fifhes 

 having the ventral fins placed on the abdomen 

 l)ehind ihe pedoral fins. 



Abbreviated 



