SALIVARY GLANDS OF LOWER PRIMATES 



109 



gus, Figs. 6 and 17; Simia salyrus. Figs, i and iS), or compound in 

 the sense of carrying only the accessory glands (all three types of 

 Cynocephalus, Figs. 3, 4, 5, 19, 20, 21). 



C. Finally in certain forms the sublingual papilla has a single 

 orifice which represents the terminal of both the submaxillary complex 

 and of the greater sublingual duct. The submaxillary duct in these 

 instances may be simple {Lemur, Figs. 12 and 23; Troglodytes, Figs. 

 2 and 22), or compound, with both secondary submaxillary gland and 

 duct, and accessory glands (A teles. Figs. 11 and 25). 



Genetically this condition must be derived from the preceding 

 forms, by extension of the keel formation forward in the papillary 

 zone beyond the level of the separate openings of submaxillary and 

 sublingual ducts, so that, by further canalization of the crest, both 

 ducts obtain a single common terminal segment, indicated in Fig. 26 

 by the green area C 



As far as generic characters are concerned, the three Cynocephalus 

 species here reported (Figs. 3, 4, 5, 19, 20, and 21) are absolutely 

 congruent. They possess all three alveolingual components. The 

 greater sublingual duct has a separate papillary orilice. The sec- 

 ondary submaxillary duct and gland has not developed, and the 

 main submaxillary duct receives the short ductules of accessory 

 prehngual glands. This arrangement seems, therefore, characteristic 

 for the Baboons. 



The two Macaques here figured (Figs. 6, 7, 17, and 22) also show a 

 consistent type common to the entire genus, characterized by the 

 separate orifice of the greater sublingual duct. The main submaxil- 

 lary duct of Macacus cynomolgus (Figs. 6 and 17) is simple, as it is 

 also in several additional species examined {Macacus pilealus, rhesus, 

 ochreatus) . This arrangement appears to be typical for the genus as a 

 whole. Macacus nemestrinus (Figs. 7 and 22) shows in addition a 

 secondary submaxillary duct, approaching in this respect closely to 

 one of the adult human variants recorded in Part I (cf. supra, Part I, 

 page 14, Figs. 7 and 9). 



A marked character of the Macaques is the partial subdivision of 

 the lesser sublingual mass, the resulting interval being occupied by 

 the greater sublingual gland! 



The South American forms are in general characterized by great 



