106 MESSRS. MURIE AND MIVART ON THE 
Fig. 8. Similar view to fig. 7, but on the left side of the Aye-Aye (Cheiromys madagas- 
cariensis), ‘The muscles are designated by the same lettering. No trace of 
a depressor scapule is present. The fibres of the latissimus dorsi commingle 
with those of the rhomboideus. 
PLATE IV. 
Deeper layers of the dorsal muscles, and dissected views of the anterior limb in Galago 
crassicaudatus, also the thoracic segment of Lemur catta to demonstrate its multiple 
pectoral and supracostal muscles. 
Fig. 9. Right lateral half of the neck and chest in the Grand Galago, displaying the 
third or middle muscular layer. The Splenius and Rhomboideus muscles, 
seen from behind in PL. IIL. fig. 6, have here been removed, and the con- 
tinuation of the long dorsal muscles into the neck thus brought out. 
Co. Complexus, cervical continuation of the Serratus 
Bi.c. Biventer cervicis. 
Di. Digastric (mastoidal attachment). 
L.cl. Levator clavicule. 
T.ms. Trachelo-mastoid. 
C.as. Cervicalis ascendens. 
Tr.c. 'Transversalis cervicis. 
S.J, Sacro-lumbalis, 
Lo.d. Longissimus dorsi. 
L.as8.=S.mg. Levator anguli scapulee, or 
magnus. 
S.p.a. Serratus posticus anterior cut 
through ; the dotted lines carry it on to 
the spine. 
S.p.p. Serratus posticus posterior. 
Ex.o. External oblique (its costal digita- 
tions). 
In. Marks some of the intercostal muscles, 
Sca', Dotted line expressing continuation of first or long scalenus muscles, which, 
attached to the fourth rib, passed through the serratus magnus previously to its ascent 
into the neck. 
Fig. 10. The vertebral column, seen behind, from the skull to the ilia, in the same 
animal, showing the fourth muscular layer on the right side and part of the 
next or deepest layer on the left side. Just sufficient of the ribs have been 
left to guide the eye to the dorsal division of the vertebra. 
Co. Complexus, 
Bi.c. Biventer cervicis. 
T.ms. Trachelo-mastoid, thrown outwards 
to show the spinal attachment of the 
two former muscles. 
Sl. Sacro-lumbalis. 
Lo.d, Longissimus dorsi. 
3Sp.d. 4 spinalis dorsi. 
4 Sp.c. 3 cervicis, 
Mi.s. Multifidus spine. The pointers 
include some of the lumbar portions of 
this complex muscle. The exposed 
dorsal parts are not lettered. 
