THE EAR. 417 
ear in the fact that the edges of the auricular cartilages are 
rolled together proximad so as to overlap. There is thus no 
gap between the tragus (g) and antitragus (/), as in man, but 
these two structures partly overlap. 
The free edge (4) of the auricular cartilage corresponds 
partly to the helix of man. At its 
mediocranial angle the proximal part 
of the auricle is composed of muscle 
and integument only, so that the 
cartilage when isolated presents here 
a deep notch distad of which is 
a prominent projecting angle, the 
spine (c) of the helix, which serves 
for attachment of the adductor auris 
superior muscle (Fig. 169, 1). Proxi- 
mad of the spine, separated from it 
by the deep notch, the cranial edge 
(g) of the auricular cartilage ap- 
proaches the caudal edge (%), finally 
overlapping it, so that the cavity of 
the auricle is now completely sur- 
rounded. This overlapping portion 
of the cartilage is on the medial side 
of the cavity, and in the natural state 
is covered by muscles and integu- 
ment, So as not to be apparent. Fic. 168.—CARTILAGE OF THE 
That portion of the cranial edge Exrernat Ear, CRANIOME- 
of the cartilage that overlaps the cau- PA VIEW. : 
: a, scapha or pinna; 4, helix, 
dal edge forms a cartilaginous plate «, spine of the helix; d, antihelix; 
which projects proximad as a blunt ® concha; ©, cartilaginous andi- 
: ; z tory meatus: 7, crista helicis; g, 
point; this plate is the tragus ( g). tragus; 4, antitragus; z, processus 
Along the inner edge of the tragus is tsi, minentia conche. 
a ridge which forms a continuation of the helix; this is the 
crista helicis (7). The portion of the caudal edge of the car- 
tilage that is partly overlapped by the tragus is an irregular flat 
plate known as the antitragus (7). At its caudolateral margin 
the antitragus extends distad as a thin, pointed, cartilaginous 
spine, the processus uncinatus (2). This supports a sheet of 
