VOL. XXXI.] PHILOSOPHICAL TRANSACTIONS. 44^ 



the right side, that receives all the lymph on that side, and conveys it into the 

 jugular; 35, the descending cava; 36, the mammary vein, which is sometimes 

 single; 37, the subclavian veins; 38, the vertebral vein; 39, the axillary veins; 

 40, the jugular veins; 41, the right internal jugular, not injected; 42, a small 

 secondary lymphatic gland on the back part of the top of the thorax; 43, the 

 sacculus, that receives all the chyle and lymph from the whole body, excepting 

 30, 31, 32, 33, 34, and discharges it into the vein; at least we know of no 

 other lymphatics that any where else enter the veins; 44, a lymphatic, or mem- 

 brane, for it was not injected, that joins 29 to the largest branch of the tho- 

 racic duct. 



Fig. 13, represents the upper part of fig. 12 reversed, the duct, &c. being 

 turned up, that the insertion, both sacculi, &c. may be better discovered. This 

 figure is to be explained by the preceding, and has only from 42 to 44 more 

 figures than the upper part of fig. 1 1. 



N. B. In this subject, the chyle and lymph are emptied into the jugulars, 

 and not into the axillary veins; they are sometimes emptied partly into the 

 jugular, and partly into the axillary, or subclavian vein. In men, generally 

 into the subclavian. 



Fig. 14, represents part of the left cheek of an ox, separated from the lower 

 jaw-bone, with the external maxillary glands, its ducts, &c. I, 2, 3, &c. to 

 14, are bristles inserted into the ducts of the external maxillary gland HI; 

 these ducts open sloping into the mouth, for the better mixture of the saliva 

 with the food; 15, the duct 3 injected with wax, to discover its division and 

 size, in respect of the orifice; 16, a lobule of the maxillary gland; its excretory 

 duct is filled with wax, and ends at 15; 17, the duct 1 laid bare and opened 

 to show its large cavity, &c. ; aa, part of the muscles and fat, &c. belonging to 

 the lower jaw ; bb part of the internal membrane that invests the mouth ; abed, 

 bristles in those ducts of the buccal glands, nn, that I could pass any into; 

 eee, those orifices of the buccal glandules, that were too small to admit bristles; 

 kkk, the papillae on the inside of the mouth; 111, the lobes that constitute the 

 external maxillary gland; mmm, the orifices of the labial glandules pp, that 

 were too small for passing bristles; nnn, buccal glandules interspersed between 

 the lobules of the maxillary gland ; nnn near rrr, part of the buccal glandules, 

 where they appear thickest, and are raised to discover the ducts rrr, running 

 under them; ppp, the labial glandules like the buccal: Mr. Cowper, in fig. 4, 

 letters them h, h; rrr, the ducts marked 6 to 14, as they appear under the 

 glandules nn. 



N. B. The same numbers and letters express the same things in the following 

 figures. 



VOL. VI. 3 M 



