PHARYNGEAL TEETH OF FISHES. 



387 



arch has five flat dome-shaped tubercles. All these tubercles 

 also are teeth-bearing. The upper pharyngeal teeth consist of a 

 long narrow patch on the second epibranchial, an irregular 

 oblong patch on the third epibranchial, with another narrow 

 piece running down this epibranchial, and on the fourth epi- 



FlG. III. — ScORFiENA SCROFA. 



branchial a roughly circular patch that has its lower margin 

 projecting from the mucous lining of the back of the mouth. 

 The lower pharyngeal teeth are arranged in a roughly diagonal 

 patch. All the pharyngeal teeth are cardiform. Fig. III. 



Sebastes imperialis, a Mediterranean fish. The upper and 

 lower pharyngeal teeth are minute cardiform teeth. Fig. IV., 1. 



