150 ANATOMY OF THE SALIVARY GLANDS IN THE CARNIVORA 



along which they occasionally ascend a short distance towards the 

 parotid duct, which, so far as our observations go, they never reach, 

 far less surround its orifice or come into relation with the orbital glands. 

 They are then both labial and buccal or vestibular in position, a fact 

 which makes it inconvenient to term them simply buccal or labial 

 glands, and has led us to propose to designate them from the sulcus 

 with which they are associated developmentally. 



In addition to my own dissection I have made use of several of the 

 beautiful preparations of Mr. C. F. Silvester in the Morphological 

 Museum of Princeton University, in order to gain a broader basis for 

 generalization and to supply gaps in my material. For the oppor- 

 tunity to use and pubhsh descriptions of these specimens, wlaich are 

 acknowledged individually below, I owe my most grateful thanks both 

 to Mr. Silvester and to Professor C. F. W. McClure, for whose help- 

 ful assistance and generous interest in the progress of these studies, I 

 desire to record my sincere appreciation. 



The ducts of the larger salivary glands were injected with gelatine. 

 The introduction of the canula is facihtated by the pre\ious insertion 

 of a bristle or horsehair into the oritice. This procedure greatly 

 diminishes the difficulty of the proceeding, which in many cases is almost 

 impossible otherwise. In this way the parotid, submaxillar}', greater 

 sublingual, and first orbital glands were injected. The smaller ele- 

 ments were simply dissected. Their orifices easily observable with 

 a lens will usually admit a fine bristle, but very little is gained by this 

 procedure. In the cat the region of the stomal ridge, together with the 

 orbitoparotid and orbital glands were studied in serial sections. 

 The following species were examined : — 



Felis domestica 



FeUs leo 



Canis familiaris 



Ursus thibetanus 



Procyon lotor 



Mephitis putida 



Taxidea americana (2 specimens) 



Gulo luscus 



Zalophus califoriiianus (j specimens) 



Macrorhinus angustirostris 



