28 
inclusive are compressed, broad and fleshy, and are inserted in the 
strong round tendons described in the preceding muscle, and attached 
to the oblique processes of the twelfth to the sixth cervical ver- 
tebre inclusive: the ninth fasciculus, which forms the main anterior 
continuation of the longus colli posticus*, is larger than the rest, and 
receives, as it advances, accessory fibres from the spinous processes 
of the seventh to the third cervical vertebrze inclusive, and is inserted, 
partly fleshy, partly by a strong tendon, into the side of the broad 
spine of the vertebra dentata. A slender fasciculus is detached from 
the mesial and dorsal margin of the Jongus colli posticus, near the 
base of the neck, which soon terminates in a long round tendon: 
this tendon is braced down by short aponeurotic fibres to the spines 
of the fifth to the second cervical vertebre inclusive, immediately be- 
yond which it again becomes fleshy, and expands to be inserted into 
the occipital ridge : this portion is the digasirique or biv xter capitis 
of Cuvier. 
Spinalis dorsi.—The displacement of the dorsal portion of the pre- 
ceding muscle and the Jongissimus dorsi brings into view the spi- 
nalis dorsi, which is a well-developed and distinct muscle in the 
Apteryx. Origin. By two long, narrow, flattened tendons, from the 
spines of the eighth and seventh dorsal vertebra : these pass obliquely 
downwards and forwards, expanding as they proceed, and terminate 
in two fasciculi of muscular fibres ; the posterior one passes forwards 
beneath the anterior one, and inclining inwards and upwards divides 
into two portions, inserted by long tendons into the spines of the 
second and first dorsal vertebree ; it then sends a few fibres forwards 
to join the outer and anterior fasciculus, which is partly inserted by 
a slender tendon into the spine of the last cervical vertebra: the rest 
of the fibres of the second fasciculus join the portion of the longis- 
simus dorsi which is implanted into the oblique process of the last 
cervical vertebra. The three inserted tendons of the spinalis dorsi 
are also the medium of attachment of fibres continued from the 
multifidus spine, beneath them. 
Multifidus spine.—The series of muscles so called arises by fleshy 
fibres from the transverse processes of the five last dorsal vertebre, 
which pass upwards, forwards and inwards, to be inserted by four flat 
tendons into the spines of the seventh to the third dorsal vertebrze 
inclusive, and by the tendons of the spznalis dorsi into the two an- 
terior dorsal spines. 
Obliquo-spinales.—The removal of this muscle brings into view 
a series of long, narrow, flat tendons, coming off from the spines of 
all the dorsal vertebrae, and slightly expanding as they proceed for- 
wards and obliquely downwards and outwards ; they become fleshy 
half-way from their origin, and are inserted into the posterior 
oblique and transverse processes of the six anterior dorsal vertebree, 
and into the posterior oblique processes of the three last cervical 
vertebree. 
Interspinales—The interspinales muscles do not exist in the 
* « Aecessoires du long postérieur du cou, Cuvier, loc. cit. p. 284. 
