PHARYNGEAL TEETH OF FISHES. 425 



fourth on its outer aspect, carry distinct tubercles with similar 

 teeth. On the inner side of the fourth arch there are very 

 small tubercles. The lower pharyngeals carry two leaf-shaped 

 patches of villiform teeth, with a row of cardiform ones along the 

 edge at the back and in the middle, and a few others close to the 

 back edge. Where the second arch hypobranchials join the 

 basibranchials there is a patch of villiform teeth on each side, 

 showing very faintly in the illustration. Between the junction 

 of the second and third hypobranchials with the basibranchials 

 on each side, but in the centre of the mouth, there is a patch of 

 villiform teeth, roughly circular in shape, but divided down the 

 centre. The upper pharyngeal teeth are strong villiform teeth, 

 arranged in five patches — two elongated ones along the epi- 

 branchials of the second arch, a roughly four-sided patch on the 

 pharyngeal bone at the end of the third epibranchial, with a 

 smaller patch on the outer side along the arch-bone, and a 

 roughly circular patch on the pharyngeal bone at the end of 

 the fourth epibranchial. The "Bass," according to Couch, feeds 

 on smaller fish, crustaceans, and seaweeds. 



