GLANDS OF PEYER. iO 



of the large intestine, by the same author, in which the orifice 

 may be discovered in the centre, with many of the openings of 

 Lieberkuhn's follicles around it. A, is a vertical section of 

 the same follicle, showing its cavity and the orifice by which 

 it communicates with the interior of the large intestine. 

 Around it are seen the vertical tubular follicles of Boehm, 

 which appear to be the same as the follicles of Lieber- 

 kuhn. 



The Glandula AgminaicE, 



— Are better known under the name of glands of Peyer, after 

 a young anatomist who described them as well as the solitary 

 glands with much minuteness,* though they had previously 

 been pointed out by Pechlin, under the name of Vesicularum 

 Agmina. 



— These so called agminated follicles, present themselves as 

 patches under a variety of forms, generally elliptical, but some- 

 times circular or oblong. The longest diameter of the patches 

 when they are either elliptical or oblong, is always parallel with 

 the axis of the intestines. The patches are met with of all sizes 

 from two to three inches in their longest diameter, to a few 

 lines only. They vary also in regard to number ; sometimes 

 fifteen or twenty only are met with in one subject, and some- 

 times thirty or more. 



— In all cases they are found placed in the mucous membrane, 

 on the side over against the insertion of the mesentery. They 

 are found only in the small intestines, usually in the lower half, 

 and are most numerous near the termination of the ileon 

 in the colon. Peyer, however, asserts, that he discov^ered in 

 one instance a patch in the duodenum. These patches 

 appear to be formed of an agglomeration of entirely distinct 

 bodies, exactly analogous to the solitary glands of the small 

 intestines ; and in some cases where the number or size of 

 these agminated glands of Peyer is less than usual, the num- 

 ber of the solitary glands in the same region of intestine, ap- 

 pears to be increased. 



— The appearance which these glands of Peyer present, is 

 * De Glandulis latestinorum. J. Conradus Peyer, 1667.— p. 



