340 MAMMALIAN ALVEOUNGUAL SALIVARY AREA 



In his summary he states: — 



Die Ohrspeicheldruse wircl als eine Furche dem Boden der Wangenrinne ent- 

 lang angelegt, welche Furche durch Abtrennung in ihrer grossten Ausdchnung als 

 Rohr frei gemacht wird. 



Die Submaxillarisdriise wird in fast ahnJicher Wcise, obwohl als eine solide, an 

 ihrem aboralen Ende verdickte Leiste dem Boden der Alveololingualrinne entlang 

 angelegt und gleichfalls spaler abgetrennt. 



It would seem, therefore, that Hammar recognized the inception of 

 the anlage as associated with the formation of a fold, not in the sense of 

 a bridging over of the sulcus (His), but as the apposition of its walls to 

 form a blind fold or flange. I have elsewhere expressed my doubt of the 

 correctness of Hammar's observation upon the parotid, and my reasons 

 for holding that his description really refers to the orbital inclusion. 



In an embryo of 24.4 millimeters he found five lesser sublingual 

 sprouts, but not associated with a crest. The Barthohnian element 

 is not described. 



Sudler ("02) briefly notes the solidity of the submaxillary anlage, as 

 against the description of His, and its appearance before that of the 

 parotid, Hammar to the contrary. 



Goppert ('02) gives an excellent figure through the oral cavity of a 

 mouse embryo, in which the sublingualis major is attached to the floor 

 of the alveolingual region lateral to the sulcus lingualis. The duct of 

 the submaxillary is free at this level, so that the Bartholinian ele- 

 ment is at this stage caudal, as well as lateral, to the attachment of the 

 larger gland. 



Bujard ('11) describes in detail the conditions of the anlages in a 

 human embryo of about ten weeks and notes, further, an observation 

 of Paulet upon the parotid and submaxillary in an embryo of 14.7 

 millimeters. In this the anlages have the form of globular buds sus- 

 pended at the extremities of short epithelial crests, which represent 

 their ducts. The larger embryo is described in detail, on the basis of 

 reconstructions. The submaxillary has already assumed its definitive 

 relations. Bujard records the presence of a small lobule arising from 

 the venter of the duct just before its division into three primary 

 branches. This he terms the accessory submaxillary lobule : it is 

 equivalent to the ventral accessory submaxillary of Huntington. 

 With regard to the other glands his conclusions are as follows : — 



