ANATOMY OF THE SALIVARY GLANDS IN THE CARNIVORA 169 



in the adult, from the isthmian series, which I take to be the cranial 

 extension of the faucial focus of the embryo. 



The isthmian glands are a numerous group in the arcus palatinus, 

 filling the interval between the lesser subHnguals and the palatine 

 glands, with both of wliich they are continuous in the adult. The 

 palatine group, the orifices of which are scattered over the soft palate 

 and the surface of the internal pterygoid muscle, are separated from 

 the orbital series only by the inner gland-free area of the trigonum 

 glandulare. In the embryo cat of 70 millimeters {vide Part VI, Fig.i 14) 

 there is a sagittal interval between the anlages of the orbital and 

 faucial elements ; the latter are attached to the roof (palatine glands) 

 and sides (isthmian glands) of the fauces and are perfectly continuous 

 at this stage, the earhest in which their presence has been observed. 

 The recognition of isthmian and palatine groups, both evolved from 

 the faucial focus of the embryo, is purely for convemence of reference 

 and implies rather a topographical than an important morphological 

 distinction. 



FELIS LEO 



In a lioness (Morphological Museum of Princeton University, No. 

 1471) conditions very similar to those of the cat obtain (Fig. 6). The 

 parotid orifice (j) is at the extremity of a stomal ridge (75), opposite 

 the midcusp of the upper carnassial. The duct (2) is horizontal, 

 transmuscular, devoid of accessory lobules, single at its emergence 

 from the body of the gland (/), which lacks a ventral angle. Pre- 

 meatal and postmeatal processes are moderately developed. The 

 first orbital {g) is large, bilobed ; its duct opens on the stomal ridge 

 behind the parotid, opposite the third cusp of the carnassial. The 

 inferior alveobuccal glands are well developed; caudad they ascend 

 rather nearer to the parotid than in the cat. The submaxillary {20) 

 closely resembles that of the cat. The sublingualis major {23) is 

 elongated, molded upon the digastric (jj), its fundus apphed to 

 the cranial and a portion of the mesal surface of the submaxillary. 

 The prolongation along the duct is well developed and not externally 

 distinguishable from the body proper. Its cranial extremity is placed 

 ventrad to its own duct (24), and is crossed by the duct of the submaxil- 

 lary gland {21) on its lateral surface. The orifices of these ducts are 



