Alt — Glandular Structures Appertaining to the Human Eye. 199 



the " glands of Krause." As I could not procure Krause's 

 own original description * I had to rely on what the text-books 

 could give me, and this is what I found. 



H. Frey f states that " in man we find small acinous 

 glands, so-called mucous glands (according to Henle * acces- 

 sory lacrymal glands '). They lie in the fornix of the con- 

 junctiva between the tarsal tissue and the eyeball, and 

 there are in the upper eyelid as many as 42 of them, in the 

 lower eyelid from 2 to 6." 



What Frey here refers to, are probably the lacrymal glands 

 forming the palpebral or inferior lacrymal gland and the 

 adjoining separate lobules which I have described, and which 

 together may number about 40. Why, however, he calls 

 them mucous glands, Frey does not explain. 



W. Waldeyer % says: "The acino-tubular glands in man 

 lie in certain distinct localities, at the edge of the tarsus near- 

 est the fornix, and with 'preference in its nasal part. There 

 they are found, partially along the edge of the tarsus, and 

 partially within the tissue of the tarsus itself. They are 

 more numerous in the upper eyelid than in the lower one; ac- 

 cording to Krause and his pupil Kleinschmidt there are about 

 42 of them in the upper and from 6 to 8 in the lower eyelid. 

 Their excretory ducts open into the conjunctiva of the fornix. 

 The glandular body belonging to an excretory duct is rela- 

 tively large and consists of short tubular glandular chambers 

 to which round acini are attached in large numbers." Yet, 

 in the text to his beautiful illustration, he calls the acinous 

 glands lying buried wholly within the tarsal tissue itself, the 

 acino-tubular glands. 



Surely it is utterly impossible from these two apparently 

 authoritative descriptions to arrive at a clear and distinct idea 

 of what is meant by the term " Krause's glands." Frey calls 

 them mucous glands or, with Henle, accessory lacrymal 

 glands, and Waldeyer states that they lie with preference in 



* Zeitschrift fur raticmelle Medicin. 4 : 337. (1854). 



t Handbuch der Histologie and Histochemie des Menschen. 673. Leipzig. 

 1874. 



X Handbuch der gesammten Augenheilkunde, von A. Graefe u. Th. 

 Saemisch. I 1 : 238. Leipzig. 1874. 



