SALIVARY GLANDS IN MARSUPIALS, INSECTIVORES, RODENTS 317 



gland terminates in two processes separated by a deep notch. The 

 cephalic prolongation covers the corresponding portion of the sub- 

 maxillary duct (/) . The narrower caudal process is longer and extends 

 into the neck overlying the sternomastoid muscle. 



The parotid duct occupies the ungulate position on the mesal 

 surface of the mandibular angle and internal pterygoid muscle, 

 turning thence dorsad along the cephalic margin of the masseter to 

 the buccal orifice. 



2. The submaxillary gland (i), of triangular shape, and composed of 

 several loosely connected lobes, lies in the lower cervical region, 

 in the supraclavicular fossa, its base corresponding to the entire 

 length of the clavicle. 



The long, slender submaxillary duct (/) ascends on the sternomastoid, 

 and reaches the oral floor by passing under cover of the ventral pro- 

 longation of the parotid, continuing thence forward to the phca 

 subungualis. In this long course the duct is simple without lateral 

 derivatives. 



3. The lesser subhngual glands (j) form a slender mass on the lateral 

 aspect of the terminal portion of the submaxillary duct. 



I could, in this specimen, find no indication of a greater sublingual 

 duct and gland. I am under the impression that a specimen of 

 Pteropus contained in the Princeton Museum shows a small Bartho- 

 linian gland closely embedded in the dorsal border of the submaxillary 

 gland, with a slender duct accompanying the submaxillary duct to 

 a separate parafrenular orifice. 



[Note by Editors: — On inquiry the presence of a greater sublingual gland in a 

 specimen of Pteropus contained in the Princeton collection was ascertained.] 



Fig. 4. ScALOPS Aquaticus — .\merican Mole. 

 Columbia University Morphological Museum, No. 1962. 



In this insectivore all three major salivary glands, parotid, sub- 

 ma.xillary, and greater sublingual, are present. 



They have all shifted from the facial, inter-, and sub-mandibular 

 regions caudad to the level of the pectoral girdle. 



The parotid (5) appears divided into two main lobes. 



The greater sublingual gland is entirely under cover of the lateral 

 portion of the subma.xillary (/). Only its duct (2) is exposed on the 



