VOL. XXXI.] PHILOSOPHICAL TRANSACTIONS. AA^ 



all the other glands of the mouth, viz. by many ways from the buccal, besides 

 their colour; in which particular, they are also distinguished from the internal 

 maxillary and sublingual glands; they differ also from these as well as from the 

 parotids, in having a great number of common excretory ducts. This number 

 of excretory ducts was not observed by Steno, nor did he know that these ducts 

 in the same line, were the excretory ducts of large conglomerate glands, like 

 the parotids, distinct from the buccal. 



Bartholine, p. 542, mentions the external maxillary glands, but does not 

 describe them. Nuck, Adenol. p. 5, n. U, only gives them a place in his 

 Catalogue of Glands, but takes no further notice of them, though he writes 

 a book, Sialog. p. 15, J 58, chiefly about a new salival duct rising from a gland 

 found in no animal besides a dog. 



Mr. Cowper had never seen these external maxillary glands, as appears by a 

 letter of his, now by me, written above 20 years since, in answer to one I 

 sent him on the first discovery of these glands. The external maxillaries in 

 men, of the conglobate kind, are marked g, in the first figure of his Myotomia 

 Reformata. 



The ducts of the external maxillary glands are opposite to the orifices of 

 Steno's ducts; from which glands and ducts, as also from the buccal, labial, 

 and gingival glands, the saliva flows from all parts of the mouth without the 

 teeth. From Wharton's and the sublingual ducts, from the tonsils, fauces, 

 fretum Stenonis, gingival, lingual, and palatine glands, the saliva is derived 

 from the upper and lower, former and hinder parts of the mouth within the 

 teeth. 



What has been said of these salivary glands, &c. will be best understood by 

 the following figures, drawn in October 16973 at Trin. Coll. Oxon. by Mr. 

 Burghers, and have been lately compared with the parts themselves in cows, 

 calves, &c. These figures are part of many more taken from preparations at 

 the same time. 



The insertions of all the lymphatic vessels into the veins can be discovered 

 only in few subjects ; and no figure has yet been given of them. 



These figures show the course of the lympha, both below and above the 

 subclavian veins in men, and axillary veins in dogs. The lympha below the 

 receptaculum chyli is conveyed from all the inferior parts by a great number of 

 small lymphatic vessels, which uniting with others obliquely above the valves, 

 become larger in proportion, till at length they constitute two large trunks near 

 the emulgents, which are the pedunculi or beginnings of the receptaculum 

 chyli. The lympha from the parts above the subclavian veins is derived in like 

 manner from lesser lymphatics, to the common ducts here delineated. 



