488 DR. H. BURMEISTER ON PONTOPORIA BLAINVILLII. [May 9, 



Fig. 2. 



Larynx and trachea oi Ponto2yoria blainvillii, two-thirds of the natural size, 

 seen from above (dorsal side). 



a. Epiglottis, b b. Lateral arches of thyroid cartilage, c. Cricoid cartilage, 

 c?. Trunk of the trachea, e. Left branch. /. Right branch, g. Continua- 

 tion of the trunk, h. Left bronchus, k. Eight bronchus. 



