158 ANATOMY OF THE RABBIT. 
of the articulating portion with the condyloid process, the 
so-called neck of the mandible (collum mandibulae), is a thin 
plate of bone, the anterior and posterior margins of which are 
barely notched by the anterior and posterior mandibular 
incisures. Connecting the anterior incisure with the rim of the 
alveolus of the last cheek-tooth there is a deep groove, the sulcus 
ascendens, the lateral margin of which is formed by the reduced 
coronoid process (processus coronoideus). Its low medial margin 
is formed by a bony stay which 
extends to the medial surface of 
the horizontal portion opposite the 
last cheek-tooth, and is continued 
forward into the mylohyoid line. 
The sulcus ascendens lodges in the 
natural. condition the insertion 
portion of the greatly reduced 
temporalis muscle. 

C: 
THE HYOID APPARATUS. 
BIG O'S. Lateral “surface” cf the 
hyoid and roe c.a., arytenoid The hyoid bone (os hyoideum) 
Cantilages) /G:c.,/ackicoid sicartilage;s ccs, 
inferior cornu of thyreoid cartilage; (Fig 65) is a stout somewhat 
c.m., lesser cornu of hyoid; c.mj., greater 2 * ? 
cornu of hyoid; c.s., superior cornu of r fac = : 
thyreoid cartilage; c.t., left plate of the W edge shaped bone lying il front 
thyreoid cartilage; e., epiglottic cartilage; of the larynx and between the 
f.t.s., thyreoid foramen; l.h., lateral ae 
hyothyreoid ligament; 1.h.m., median angles of the mandible. Its ven- 
hyothyreoid ligament; m.ct., cricothy- 
reoideus muscle; o.h., hyoid bone; s.m., tral portion is connected with the 
stylohyoideus minor muscle; s.mj., stylo- 
hyoideus major muscle; tr., cartilaginous thyreoid cartilage of the larynx 
tracheal rings. ’ % ra 
by the median hyothyreoid 
ligament. With its lateral portion are articulated two indepen- 
dent elements, termed the lesser and greater cornua. The lesser 
cornu (cornu minus) is a small, partly cartilaginous structure, 
attached to the anterodorsal angle of the hyoid, and connected 
through the stylohyoideus minor muscle with the jugular process 
of the skull. The greater cornu (cornu majus) is a larger element 
extending obliquely dorsad, and similarly suspended from the 
jugular process by the stylohyoideus major muscle. The con- 
nection of the lesser cornu with the styloid process through the 
stylohyoideus minor replaces the stylohyoid ligament of the human 
