186 Trans. Acad. Sci. of St. Louis. 



tion has of late been reintroduced and has become a legiti- 

 mate surgical procedure. 



The investigations herein recorded may claim to be original 

 in so far as they were made, in a sense, as if I had known 

 nothing of the literature on the subject. This was in reality 

 the case with some of the more recent monographs which I 

 did not and had no chance to consult until my researches, 

 at least as far as my material would allow me, were finished. 



The illustrations, except the three last ones, which are more 

 or less schematic drawings, are made from photographs I 

 took of my own specimens. 



THE ORBITAL, PALPEBRAL AND CONJUNCTIVAL LACRYMAL 



GLANDS. 



The lacrymal gland is usually spoken of as consisting of 

 two separate parts, one the so-called orbital lacrymal gland 

 and the other termed the inferior, palpebral, conjunctival or 

 accessory lacrymal gland. 



The orbital lacrymal gland, as its name denotes, is situated, 

 at least to its greatest extent, within the orbital cavity. There 

 it is located in the fovea lacrymalis which lies right behind the 

 outer upper bony orbital margin in the processus zygomaticus of 

 the frontal bone. Its anterior end usually slightly protrudes 

 beyond the bony margin. The gland is held in this position 

 by a connective tissue capsule which is united with the orbital 

 periosteum by means of loosely interwoven trabeculae. This 

 capsule is generally somewhat firmer on the nasal side of the 

 gland. 



When this gland is in toto removed from the fovea lacry- 

 malis, its shape is seen to resemble to some extent that of an 

 almond (Fig. 1). It is convex at the orbital surface, and 

 more or less concave at its ocular (lower) side. Its posterior 

 portion is usually thick and rounded, its anterior one thinner 

 and sharper. The posterior part of the gland may, when it is 

 well developed, reach back into the orbit about as far as the 

 anterior third of its depth. The nasal edge usually reaches 

 to the temporal margin of the superior rectus muscle. 



However, the actual measurements of this gland, like those 

 of other glands, are subject to great variations. As an inter- 



