Journal of Kiitoniolofi) and Zoolog\ 



model. The larger model gives a picture of the mucous membrane 

 and the nasal chambers, the smaller shows the shape of the nasal 

 chamber. The knob on the inner side of the larger model is Jacob- 

 son's organ. The drawings are by Elizabeth Keyes. 



(Contribution from Zoological Laboratory of Pomona College.) 



Upper figure section of the model of epithelium. 



Lower figure model of epithelium from the outside. Jacobson's organ, the 

 little elevation in the lower t-enttr. X40. 



