1909.] 



OLFACTORY ORGAN" OF TELEOSTEAN FISHES. 



657 



opens to the exterior by two nostrils, and contains a rosette in 

 which the component laminae are as a rule set radially around the 

 sides and hinder end of an axis which is attached in front to the 

 anterior wall of the anterior nostril (Rosette, Column 1). 



An olfactory organ of this description occurs in most of the 

 lower Teleosteans, and is well represented in a generalized con- 

 dition in the Haddock, which, therefore, serves as a good central 

 type with which to compare the rest. 



Minor variations occur to different degrees in all parts — in the 

 details of the nostrils, of the rosette, and of the cavity, some of 



Proc. Zool. Soc— 1909, No. XLV. 45 



