ANATOMICAL NOMENCLATURE 102 



with; the terms adopted throughout are exceedingly satisfactory. The names 

 for the genitourinary organs are nearly all easily understood; the terms Annulus 

 urethralis vesicce, Crista urethralis, Corpus glandulare prostates, Isthmus prostates, 

 Colliculus seminalis (the old Caput gallinaginis) are especially dealt with. 



As might have been expected, there are numerous notes upon the pelvic 

 floor and the pelvic fascia. After the notes were written the Commission changed 

 Trigonum urogenitale to Diaphragma urogenitale. The floor of the pelvic 

 cavity is formed by the M. levator ani and the M. coccygeus, and to this mus- 

 cular funnel the name Diaphragma pelvis, suggested by H. Meyer, is given; 

 the fascia above it is called the Pars diaphragmatica fasciae pelvis, that below 

 it the Fascia inferior diaphragmatis pelvis. The two parts of the Fascia pelvis 

 are designated Pars diaphragmatica and Pars endopelvina, instead of, as of 

 yore, Pars parietalis and Pars visceralis, the reason being that the latter terms 

 are used only for serous membranes. The distinction between the Arcus 

 tendineus musculi levatoris ani (the tendinous arch helping to give origin to 

 the M. levator ani interwoven with the obturator fascia, whose two extremities 

 reach to the upper margin of the pelvis) and the Arcus tendineus fasciae pelvis 

 is sharply drawn; the latter crosses the former and the two are easily separable 

 from one another. 



The Diaphragma urogenitale, the triangular mass of tissue stretching across 

 between the pubic rami leaving a space at its upper end (beneath the Lig. arcua- 

 tum) open for the passage of the Vena dorsalis penis (s. clitoridis), is described 

 as having a framework made up of two powerful fascial layers, the Fascia dia- 

 phragmatis urogenitalis superior (the old "deep layer of the triangular liga- 

 ment"), and the Fascia diaphragmatis urogenitalis inferior (the old "superficial 

 layer of the triangular ligament"). These two fasciae are fused at their upper 

 and lower margins, enclosing a flat slit-like space. The union of the upper 

 margins gives rise to the Lig. transversum pelvis. The compartment between 

 the two layers (middle perineal compartment) is traversed by the membranous 

 urethra with its M. sphincter urethrae membranacece. In the compartment lie 

 the M. transversus profundus, Cowper's glands, and numerous venous plexuses. 

 The term "Fascia perinei propria" has been dropped; it was used in so many 

 different ways that students were confused by it. 



The revision of the names for the peritonaeum seems satisfactory. By 

 Membrana mesenterii propria is meant the layer of connective tissue remaining 

 after removal of the two peritoneal layers; it carries the blood and lymph-vessels, 

 lymph glands, and fat. The division of the Bursa omentalis (lesser peritoneal 

 cavity) into a Vestibulum, Recessus superior, Recessus inferior, and Recessus 

 lienalis, is important. The Plica gastropancreatica is explained. 



The old name of suspensory ligament of the liver has been changed to Lig. 

 falciforme hepatis for obvious reasons. 



On the following terms of gynaecological anatomy comments are made: 

 Lig. suspensorium ovarii, Bursa ovarica, and Parametrium. 



