MAMMALIAN ALVEOLINGUAL SALIVARY AREA 



341 



La sublinguale et les glandes alveolo-linguales sont par centre aux premiers 

 stades de leur developpement. Dans la premiere, la longeur et la differenciation 

 marquee du canal excreteur sont hors de proportions a vec un corps glandulaire tout 

 juste ebauche; c'est la le reflet du mode de bourgeonncment primaire des glandes 

 salivaires, lequel est I'apparition precoce du canal, qui se dessine parfois meme 

 avant le corps (parotide d'apres Hammar). Chez le foetus humain de 10 semaines 

 environ, ce mode primitif est deja efface pour la parotide et la sousmaxillaire, par 

 la ramification de ces glandes: il est encore evident dans la sublinguale. 



La Crete glandulaire primitive se retrouve encore dans le fait que les bourgeons 

 des glandes alveolo-linguales sont tous encore dependant d'une liste epitheliale 

 commune, tres haute par place. 



The lesser sublinguals, five in number, arise from a common crest 

 attached to the oral epithelium along the line of a faint furrow, which 

 appears to be the sulcus circumflexus. A sixth smaller sprout in line 

 with these, but not attached to their crest, is denominated Glandula 

 buccalis. That the ducts of the larger salivary glands antedate their 

 sprouts in time of appearance is more than questionable. The clear 

 description of the relations of the lesser subhnguals to their crest of 

 origin is confirmatory of Chievitz's report, in connection with which 

 it must be taken to outweigh Hammar's statement to the contrary. 

 The crest is important as representing a transition between the simple 

 sprouts of the later diffuse glands and the keels of the submaxillarv 

 and sublingualis major. To the diffuse glands of the lesser subungual 

 series must be assigned the Glandula buccalis of Bujard. 



Elsewhere in the work of which this paper forms a part. I have re- 

 corded some observations upon the development of these glands in the 

 cat. The sublinguaUs major appears as an independent anlage (Fig. 

 i), as in the mouse, and retains its independence throughout develop- 

 ment. The inception of the submaxillary is attended with the forma- 

 tion of a flange, attached to, and representing a portion of, the Ungual 

 sulcus just caudal to the Ungual nerve crossing; yet the conclusion 

 seemed to be warranted that the definitive structures of the gland were 

 derived by a proUferation, begun in the border of the flange and thence 

 advancing along the lingual sulcus, so that duct and sprout appeared 

 as the result of a common process. The same, except that there is no 

 flange, is true of the subUnguaUs major. In the separation of the sub- 

 maxillary, remnants of the flange remain attached to the lingual sul- 

 cus as a postglandular flange, and to the duct of the submaxillary, the 



