860 MR. ST. GEORGE MIVART ON THE [ Dee. 6, 
The internal oblique (figs. 2, 6, and 7, I. O) arises by a very 
strong tendon from the anterior margin of the ilium ; thence radia- 
ting, it passes upward beneath the sacro-lumbalis to the lumbar 
transverse processes, and there, as well as downward and forward, 
it is undistinguishable from the external intercostals, and so con- 
tinues fleshy to the ventral middle line. 
From its origin, it is more or less separable into a dorsal and a 
ventral portion. The dorsal part somewhat resembles a quadratus 
lumborum, except that it is on the dorsal side of the transversalis 
fascia. 
Transversalis. This muscle arises as a very delicate fascia ex- 
tending downward, inside the body-wall, from the dorsal region. 
Its fibres seem to form the internal intercostals, the abdominal 
nerves passing between this layer and the internal oblique. 















Deepest muscles of right side; the scapula removed. 
C. Complexus. C.A. Ceryicalis ascendens. C.M. Cerato-mandibular. D, 
D>, Deltoid. E£. O. External oblique. G.H. Genio-hyoid. G. G. Genio- 
glossus? H. Cerato-hyoideus. JZ. O. Internal oblique. ZL. Levator clavi- 
cule. O.H. Omo-hyoid. PP. Pectoralis. P.C. Supracostalis. Sc. Sca- 
lenus. S.H. Sterno-hyoid. S.M/. Serratus magnus, S¢, /, Sterno-mas- 
toid. 7. H. Sterno-thyroid. 

