This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...below, it divides superiorly into two limbs, termed the crura antihelicis, between which is a triangular depression, the fossa triangularis. The elongated furrow between the helix and antihelix is named the scapha. The concavity of the concha is overlapped in front by a tongue-like process, the tragus, and below and behind bya Fm. 703.----DlAGRAMMATlC Vn-zw or ran ORGAN or HEARING. triangular projection, the antitragus; the notch, directed downwards and forwards between these two processes, is named the incisura intertragica. The tragus consists really of two tubercles, the upper of which constitutes the tuberculum supratragicum of His, and is separated from the helix by a groove, the sulcus auris anterior. The lobule is situated below the incisura intertragioa, and is the most dependent part of the auricle. The medial or cranial surface also is irregular, and presents Crus antihelicis super-lo Ductus cochlearls Auricnla Auditory tube Membrane tympani Recessus epitympunicus External acoustic meatus triangularis, etc. Tragus The anricula is usually smaller and _ _ _ more finely modelled in the female than h1“““"“t'"t“‘8‘ ‘ in the male, but presents great variations in size and shape in different individuals. In the newly born child its len th is about_ one-third of that of the ‘lad W131; e:m11I1?reaf§s Bhghtll’ "1 Fro. 704.--V1sw or Lsrsasn Sunrscs or LEFT Aomcona en an r in 0 age. 1, If t 1 i-v)_ The relation of the width to the ( a mum me height is termed the auricular index, and is expressed as follows:--width of auricula x 100.. V W.---e 7--=Auncu1ar mdex. length of aur1cula This index is less in white than in dark races. The cephalo-auricular angle may be...