24 MESSRS. MURIE AND MIVART ON THE 
four or five dorsal vertebre, and all the cervical vertebre. It is inserted into the 
occiput as usual, and internally to the splenius. Shown by Cuvier, pl. 71. figs. 2 & 3, L. 
In Galago crassicaudatus (Pls. III. & IV. figs. 6, 9 & 10, Co) it only passes to the 
second dorsal. . 
In G. allenii it arises from the zygapophyses of the first eight dorsal vertebre, and 
from the zygapophyses and transverse processes of the seventh, sixth, and fifth cervical 
vertebra, the slips from each being somewhat separated. Insertion as in L. catta. 
According to Meckel’ there is an accessory slip in Loris. 
In Nycticebus tardigradus? it arises from the dorsal spines as low as the third. 
In Zarsius* the complexus is described as united with a biventer cervicis. The former 
of these is the broader, and springs from the transverse processes of the most anterior 
dorsal and most posterior cervical vertebrae, and goes to the occiput. 
There is no BIVENTER CERVICIS in Lemur catta, according to our dissection; but Cuvier 
appears to have recognized a portion of the complexus as digastrique dw cou, as it is 
represented in his 71st plate of his ‘ Recueil,’ figs. 2 & 3, K. 
This muscular division is demonstrated in Galago crassicaudatus (P1. III. fig. 6, and 
Pl. IV. figs. 9,10 & 11, Bi.c), its hindermost tendon reaching the sixth dorsal vertebra. 
In Tarsius* this muscle is described (as already said) as united more or less with the 
complexus. It is the smaller and longer of the two, arises from the transverse processes 
of the six most anterior dorsal vertebrie, and is inserted into the occipital protuberance. 
it has no median tendon. 
TRACHELO-MASTOID.—This is represented by a flat muscular band, which arises from 
the transverse processes of the first dorsal and last two cervical vertebre; the insertion 
of this is into the outer region of the occiput. 
Cuvier’s figure represents this as having an origin somewhat more forwards, pl. 71. 
fig. 2, Li. 
In Galago crassicaudatus (Pl. IV. figs. 9 & 10, Z.ms) its tendons attach themselves 
from the sixth dorsal vertebra forwards to the skull; fibres communicate also with the 
heads of the ribs. In G. allenii this arises from a few of the cervical vertebra, and is 
inserted into the mastoidal region of the periotic. 
It is said to be present in Tarsius, Burmeister remarking’ that what must be taken as 
this muscle arises from the transverse processes of the second, third, and fourth cervical 
vertebra, and goes to the transverse process of the atlas, and thence to the occiput. 
RECTUS CAPITIS POSTICUS MAJOR.—This is thick, and extends from the spine of the axis 
to the occiput. It is covered at its insertion by the obliquus superior, but at the same 
time diverges from its fellow of the opposite side. Figured by Cuvier in JZ. catta, 
pl. 71. fig. 3, M’. In the representation it would appear to be double, the indicating 
letter being so placed as to cover each portion. 
1 Op. cit. vol. vi. p. 146, 2 P.Z.8. 1865, p. 243. % Loc. cit. p. 37, tab. 4. fig. 4, e. 
* Loc, cit. p. 37, tab. 4. fig. 4, e. 5 Loe. cit. p. 38, tab. 4. fig. 8, m. 
