642 



Jacob Parsons Schaeffer. 



Schonemann speaks of the concha media as the 'Basoturbinale/ 

 and PauUi in an exhaustive study refers to all the major nasal 

 conchae as 'Endoturbinalien/ in contradistinction to the acces- 

 sory conchae which he designates as 'Ektoturbinalien.' 



The general text-books of anatomy, also the BNA (nomina 

 anatomica, Basel), offer nomenclatures sufficient for practically 

 all adult conditions, but not for the late fetal stage. In order not 

 to depart too far from the general texts on anatomy and the BNA, 

 yet offer for late fetal conditions a sufficiently comprehensive 

 nomenclature, I will in subsequent paragraphs use the following 

 names for the several nasal conchae and meatuses. 



The nomenclature offered is not necessary for all cases, never- 

 theless it is essential to have a terminology that covers not only 

 the adult, but also the extreme fetal conditions one frequently 

 meets. 



Nomenclature used in this paper: 



Meatus nasi. 



Meatus nasi inferior, 

 Meatus nasi medius, 

 Meatus nasi superior, 

 Meatus nasi suprema I, 

 Meatus nasi suprema II, 

 Meatus nasi suprema III. 



Conchae nasales. 



Concha nasalis inferior. 

 Concha nasalis media, 

 Concha nasalis superior, 

 Concha nasalis suprema I, 

 Concha nasalis suprema II, 

 Concha nasalis suprema III. 



The nasal meatuses and conchae as seen during the latter stages of 



intrauterine life 



The nasal meatuses and conchae of the fetus of the latter half of 

 intrauterine life may now be considered in detail. The ethmoidal 

 region is rather complex in construction, and with the accessory 

 folds (conchae) and furrows, the anlages of the paranasal chambers, 

 and the conchae and meatuses, offers an interesting field for study 

 from the second month on to term. The meatuses will be taken 

 up first for detailed study, followed by the nasal conchae. After 

 this the accessory folds (conchae) and the accessory furrows of the 

 meatuses will be considered; finally the anlages of the paranasal 

 chambers. 



