L36 



ROY L. MOODIE 



attention to this phase of paleontological work, which offers 

 considerable interest in vertebrate morphology, as well as to 

 describe the two casts above referred to. A comparison of the 



sup 



ui os fr 



Fig. 1 A photograph of the sinus frontales and a part of the sinus maxillaris 

 superior of the oreodont, Meryeochoerus, to show the rich blood supply, as indi- 

 cated by the molds of the arteries. X 2. 



results of paleontology and embryology, in regard to these cavi- 

 ties, would be of great importance. 



The casts made by von Brunn and Kallius ('05; figs. 35 and 

 36) of the sinuses of the human head, beautiful and complete 



