188 Trans. Acad. Sci. of St. Louis. 



lid alone, I have in normal lids almost invariably found its 

 lobules to reach downwards through and beyond the outer 

 canthus into the lower eyelid (Figs. 6, 7). The gland- 

 ular lobules here lie grouped around the temporal and some- 

 times even the lower edge of the tarsus. Similar lobules of 

 glandular tissue, only still more loosely connected with and 

 further apart from each other, are found in most eyelids to 

 extend from the more compact temporal body of this palpebral 

 glandular system towards the nasal side of the upper eyelid. 

 These more isolated lobules may reach to the middle line 

 of the eyelid and even somewhat beyond it (Figs. 8, 9). 

 They lie in the loose tissue of the fornix of the conjunctiva 

 or a little below it on the palpebral side. The farther away 

 from the outer canthus, the smaller these glandular lobules 

 usually are. Those found in the temporal side of the lower 

 eyelid seem to be of a more uniform size. Yet, there is no 

 absolute rule about this. 



It seems that when speaking of the palpebral or inferior 

 lacrymal gland, we have to include all of these separate and 

 so widely dispersed glandular lobules. Their number in the 

 aggregate may well reach up to 40 or more. 



The structure of the glandular lobules is exactly the same 

 as that of the orbital lacrymal gland. They differ in no 

 particular. Their numerous efferent ducts, lined with cylin- 

 drical epithelium, lead their secretion to the conjunctival sac 

 (Fig. 10). The statement has often been made and 

 repeated, that the ducts of these glands are taken up by 

 those of the orbital lacrymal gland around which, in part, 

 they are grouped, before reaching the conjunctival surface. 

 Whether this happens often, I cannot tell definitely in spite 

 of my numerous specimens ; but it may occasionally be the 

 case. I find, that most frequently several of these lobules 

 have an excretory duct in common, which runs separately from 

 the excretory ducts of the orbital lacrymal gland to the con- 

 junctiva. Such a duct has generally a wavy course and does 

 not reach the conjunctiva by the shortest route ( Figs . 10 to 16 ) . 

 The more widely separated and the totally isolated glandular 

 lobules in the lower eyelid and those glands which extend in 

 the upper eyelid towards its middle line, must of necessity 



