. The Pathology and treatment of venereal diseases [electronic resource]: including the results of recent investigations upon the subject . lacunae of the mucousmembrane, apparently destitute of glandu-lar structure, are also found upon the upper,and more numerously upon the lower sur-face of the urethra. They may sometimesbe traced for nearly half an inch beneaththe lining membrane, and their mouths arecommonly directed forwards. One, largerthan the rest, and called the lacuna magna,is situated on the upper aspect of the canal,from half an inch to an inch posterior tothe meatus. These lacunae
. The Pathology and treatment of venereal diseases [electronic resource]: including the results of recent investigations upon the subject . lacunae of the mucousmembrane, apparently destitute of glandu-lar structure, are also found upon the upper,and more numerously upon the lower sur-face of the urethra. They may sometimesbe traced for nearly half an inch beneaththe lining membrane, and their mouths arecommonly directed forwards. One, largerthan the rest, and called the lacuna magna,is situated on the upper aspect of the canal,from half an inch to an inch posterior tothe meatus. These lacunae, especially whendilated by long-continued inflammation, mayobstruct the passage of a sound and lead tothe formation of false passages. The ure-A. Superior surface of urethra. tnral mucous membrane is covered with theg. Fossa navicularis. c. Probe cylindrical form of epithelium. Except in inserted in D, the lacuna magna. ,i . .• _ .-i • i After Phillips.) tne prostatic region, this membrane is ar- ranged in longitudinal folds, which are 1 Kolliker, Manual of Human Histology, published by the Sydenham Soc, , p. 236. Fie. .SPONGY UEETHRA. 237 generally in contact, and close the canal, the latter appearing on atransverse section of the penis as a mere star or slit. The fact thatthe urethra, under ordinary circumstances, is collapsed, and cannotbe said to constitute a tube except when distended, is of importancewith reference to the method of using injections in the meatus be compressed, it is hardly possible that theurethral folds should be thoroughly opened, so that the fluid maycome in contact with the whole mucous surface and the mouths ofits lacunas; and unless this be accomplished, injections can be of butlittle avail. According to Mr. Thompson, the rugae of the mucous membraneappear to be connected wi$h the existence of numerous long andslender bands of fibrous tissue, which are seen lying immediatelybeneath the mucous membrane, for the most p
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