ANATOMY OF THE MUCOUS COAT. 49 



paper by M. Galeati in the Bologna Transactions, on the inner 

 coat, which he calls the cribriform coat. The pores, according 

 to Galeati, are visible through the whole tract of the canal, and 

 particularly in the great intestines." Meckel designates/^hese 

 as glandular bodies under the name of glandules mucosce, cryptoi 

 minimce. Another order of glands are those of Brunner.* 

 They are readily found in the duodenum at all ages; and parti- 

 cularly well in infancy, as low down as the ileo-colic valve. 

 The third order are the glands of Peyer, discovered in 1677.f 

 The celebrated Ruysch appears also to have understood the exist- 

 ence of the follicles of the stomach, and Swammerdam to have had 

 some idea of those of the small intestines,^ and he calls them tu- 

 buli glandulosi intestinorum interiores. I may here remark, 

 that the figure of the villi of the small intestines given by Hed- 

 wig, in his Disquisit. Ampullarum, &c. 1797, and which ap- 

 pears, from its introduction into Caldani's and M. Jul. Cloquet's 

 Anatomy, to have a classical value, is, judging from my own 

 preparations, too much a work of the imagination, executed un- 

 der probably some fallacious views of the part itself: a clustre 

 of cylindrical villi, with holes at the ends, would be an anomaly, for 

 those of the upper part of the intestines are either serpentine folds, 

 as represented in my preparations, with branches running into 

 contiguous folds; or semi-oval laminae; while those lower down 

 are of a flattened conical shape, somewhat bent, but in every in- 

 stance they are destitute of what has been termed by Lieberkuhn 

 an ampulla, and to my eye have uniformly polished surfaces, 

 uninterrupted by foramina. 



Mascagni has also introduced views of a good kind in regard 

 to the follicular structure of the stomach and colon. But it is 

 to Sir Everard Home, that we are indebted for one of the best 

 papers on the glandular structure of the stomach of different 

 animals.|| 



As the real muciparous glands have an orifice leading into 



* Glandule intestini duodeni vel pancreas secundarius; discovered in 1715 

 See Mangetus, Theat. Anat. where this paper is introduced with the plates illus- 

 trative of it. 



f See also Mangetus for the description from Peyer, with his plates. 



* Mangetus Theat. Anat. Vol. I. p. 310. 



Prodromo delta grande anatomia. Tab. xiii. 

 1 Phil. Trans. 1807 and 1817; and also his Comparative Anatomy. 

 VOL. II. 6 



