614 



MR, R. n. BURNE ON THE ANATOMY OP THE [May 25, 



into tlie nostril. The i^ostei'ior nostril is larger than the anterior 

 and of more oval shape ; it is bordered by a low lip. Between the 

 two is a narrow bridge of skin. The nostrils open into either 

 end of a pit (olfactory chamber) which is oval in surf ace- view but 

 semicircular in vertical section (text-fig. 188, B). The cavity 

 of the pit is almost completely filled by a series of leaflets (the 



Text-fig. If 



Gadus ceglefimis. 



A. The relation of tlic nostrils to the superficial bones of the face. 



B. Diagram of olfactory chamber in longitudinal section. 



olfactoiy laminje) arranged radially along the sides and posteiior 

 end of a linear axis which in front is attached to the anterior lip 

 of the anterior nosti'il. The laminte are attached to the axis and to 

 the floor and a considerable extent of the side walls of the olfactory 



* For explanation of abbreviations in the text-figures see p. 663. 



