PART IV 



GENETIC INTERPRETATION OF THE PRIMATE ALVEO- 

 LINGUAL SALIVARY AREA 



By Geo. S. Huntington 



The attempt to furnish a morphogenetic interpretation of primate 

 salivary organization in the sub- and inter-mandibular area, based on 

 observations in adult man and in the lower genera of the primate 

 order is necessarily restricted by the limits which our relatively scant 

 knowledge of primate sahvary ontogenesis imposes. The present 

 state of our information on the development of the salivary glands in 

 the human embryo is summed up in a separate chapter of this volume 

 by Schulte (cf. Part II), who has been able to supplement the small 

 and incomplete series of previous records by new observations based 

 on additional material. We lack, on the other hand, as yet all knowl- 

 edge whatsoever regarding salivary development in the lower primates. 



In attempting, therefore, at this time a definition of the morpho- 

 logical significance of the entire primate salivary apparatus of the 

 intermandibular area, as well as of the relative value of its individual 

 components, we are forced to draw our conclusions from the following 

 available sources : — 



1. The structure of the adult human salivary glands of the alveo- 

 lingual region, including variants. 



These observations are valuable because the large number of avail- 

 able individuals enables us to determine both the average normal and 

 the occasional variant conditions. A more comprehensive and definite 

 comparison of the human structures with those of lower primates 

 thus becomes possible. 



2. The development of the alveolingual sahvary glands in the human 

 embryo, as far as the same is at present ascertained. 



IIS 



