TRANSMISSION OF MALFORMA TIONS. 1 7 7 



The various projections and depressions of the human 

 pinna have received at the hands of anatomists dis- 

 tinguishing names ; with these we must make ourselves 

 acquainted. In the drawing of the pinna (fig. 93), H 

 indicates the helix, and the prominence X is the anti- 

 helix ; below the helix we recognize a projection T known 

 as the tragus. In elderly persons this is furnished with 

 some stiff hairs, sometimes of 

 great length ; opposite the tragus 

 we note another elevation marked 

 A in the sketch, this is the anti- 

 tragus. The tragus and anti- 

 tragus are separated by a deep 

 notch, the intertragic fissure. 

 The lower boundary of this fissue 

 is formed by the lobule L, which 

 varies considerably in size in 

 different individuals. The signifi- 

 cance of the terms helix and 

 antihelix is easily understood, 

 but the meaning of the term 



FIG. 93. The human pinna ; 



tragus, from the Greek, signify- H, helix ; x, antihelix ; T, 



ing a goat, is not SO evident. tragus ; A, antitragus ; L, 



Hyrtl suggests the following ex- 

 planation : In elderly persons the tragus not infre- 

 quently has some stiff hairs growing from it, known as 

 goat's hair. The presence of these hairs was formerly 

 regarded as indicating a sensual individual. It is pro- 

 bable that such ears, when the hair on the tragus was 

 abundant, caused them to resemble the sharp-pointed ears 

 of the goat-footed satyrs (aegipans). 



13 uNIVEI 



