Lateral Wall of the Cavum Nasi in Man. 641 



Ethmoidal nomenclature 



Owing to the comparatively large number of ethmoidal conchas 

 and meatuses present in the nose of the late fetus in compari- 

 son to adult conditions, it will be necessary for the sake of descrip- 

 tion to adopt some nomenclature sufficiently extensive to cover 

 the extreme cases one meets at this time. 



Zuckerkandl's nomenclature is not extensive enough to cover 

 the fetal field in all cases. He designates the ethmoidal conchae 

 as ''untere, mittlere, obere, und vierte (oberste) Siebbeinmus- 

 cheln." He speaks of the ethmoidal meatuses as ^ inferior, 

 superior, und suprema Fissurae ethmoidales." He, however, 

 complicates his nomenclature by his views on the ''vierte (oberste) 

 Siebbeinmuschel." He makes the following statements: 



"In 6.7 Percent der Falle tritt bei Kindern und Embryonen 

 noch eine vierte Siebbeinmuschel auf, die sich zwischen die mitt- 

 lere und obere Concha ethmoidalis einschiebt. . . Vierte 

 Siebbeinmuschel (Concha suprema), begrenzt: unten von der 

 Fissura ethmoidalis suprema, oben von der Siebplatte." 



There is doubtless a discrepancy in the above statements. 

 If the ''vierte (oberste) Siebbeinmuschel" inserts itself ("ein- 

 schiebt") between the "mittlere und obere Concha ethmoidalis," 

 then the furrows or meatuses that border it are his (Zuckerkandl's) 

 "superior und suprema Fissurae ethmoidales," and the "obere 

 Siebbeinmuschel" would be between his "Fissura ethmoidalis 

 suprema" and the "Siebplatte." The reader will at once notice 

 the difficulty encountered in attempting to compare this with 

 other nomenclatures. 



Killian adopts a nomenclature to cover, according to my speci- 

 mens, all cases, by naming the ethmoidal meatuses, including 

 the meatus medius, ' Hauptfurchen i-e;' and the ethmoidal con- 

 chae, ' Hauptmuscheln i-e.' He, however, includes among his 

 "Hauptmuscheln" the agger nasi (nasoturbinal) plus the pro- 

 cessus uncinatus as his 'erste Hauptmuschel,' which has not been 

 done in this paper. 



Peter also covers the field by designating the ethmoidal con- 

 chae 'Ethmoturbinaha 1-5.' The latter does not include Kil- 

 lian's 'erste HauptmuscheF among this number. 



