GLANDS. 397 



prismatic. It is a form of the glandular variety, and bears no 



cilia." * 



SOLITARY GLANDS. 



The solitary glands are scattered irregularly over nearly 

 the whole surface of the small and large intestines ; they vary 

 considerably in size, the larger glandulae being found prin- 

 cipally in the lower portion of the large intestines, and ad- 

 mitting of easy recognition without the aid of lenses, while 

 the smaller glands, situated in the lesser bowel, are scarcely 

 visible, except in states of disease, when their cavities are filled 

 with secretion. Plate LIT. fig. 6. is a drawing of these 

 glands as they appeared in a case of muco-enterite in one 

 of the small intestines, while Plate LI. Jig. 6. is a repre- 

 sentation of them as found in the larger bowel in a case of 

 English cholera in a child. 



These glands are simple sacks or cells filled with a fibrinous 

 fluid, containing imbedded in it innumerable spheroidal and 

 granular cells somewhat smaller than ordinary mucous cor- 

 puscles. 



I have observed these glandule both with and without 

 central orifices ; these have been more frequently absent than 

 present ; hence it is very probable that their normal condition 

 is that of a closed cell, and that when these cavities become 

 filled with secretion, they rupture, and thus permit their con- 

 tents to escape, the orifice subsequently closing up again. 



Not unfrequently, these glands in certain animals, but not 

 generally in man, are observed to be surrounded by a circle of 

 short and tubular cascae ; these by some observers are re- 

 garded as follicles of Lieburkuhn, and it is uncertain whether 

 their bases communicate with the cavities of the glands or 

 not, but it is generally stated not to communicate with the 

 interior of the glandulse. 



The distribution of the vessels around these glands presents 

 nothing remarkable. 



* Cyclopedia of Anatomy and Physiology, Art. " Mucous Membrane," 

 vol. iii. 



