202 Trans. Acad. Sci. of St. Louis. 



pathologischen Histologic des Thraenenschlauches). Joerss 

 made his studies on excised lacrymal sacs, and one of his ob- 

 jects was to see, whether true glands could be found in the 

 lacrymal sac, or not. In consequence, he devotes consider- 

 able space to this question and his conclusion is that, contrary 

 to the statements of other investigators, true glands are really 

 sometimes found lying in the normal mucous membrane of 

 the lacrymal sac; but, according to his investigation, they are 

 serous glands, of the type of Krause , s glands of the conjunc- 

 tiva. Mucous glands, according to him, have, thus far, been 

 found with certainty only at the orifice of the nasal lacrymal 

 duct in the nose, and it is still a moot question, whether these 

 mucous glands belong in reality to the nasal lacrymal duct or 

 to the mucous membrane of the nose. This investigator has, 

 therefore, seen only one form of glandular tissue lying in the 

 walls of the lacrymal sac, namely the acinous form, which 

 seems to be the most frequent one of the two forms which I 

 have found and described. 



It is a strange fact, that aside from Waldeyer's article in 

 Graefe & Saemisch's Cyclopaedia, mentioned above, and its 

 translation into French in De Wecker's Traite complet 

 d'ophtalmologie, and of the parts referring to the eyelids and 

 lacrymal apparatus in Fuchs' text-book, the text-books on 

 ophthalmology in general deal but very insufficiently with the 

 glandular structures which are the subject of these investiga- 

 tions. Especially, in tbe first volume of the large, very 

 recent, and generally admirable system of diseases of the eye, 

 published by Norris & Oliver, Philadelphia, 1897, in the able 

 article on the anatomy of the orbit and the appendages of 

 the eye by T. Dwight, these points, it seems to me, are passed 

 over too lightly. The lacrymal caruncle, for instance, though 

 not a very important organ, might have received a little 

 more attention than is expressed in the following words: " A 

 raised pinkish little body, the lacrymal caruncle (Vol. I, p. 

 80)." The largest amount of the literature on the subjects 

 here considered, is dispersed in journals and magazines 

 which are not, as a rule, even ophthalmological ones, and it 

 is, therefore, not easily obtained. 



With regard to the small portion of hyaline cartilage 



