54 MESSRS. MURIE AND MIVART ON THE 
Pyrammanis.—We could find no distinct trace of this muscle in either Lemur catta, 
L. varius, L. nigrifrons, or Nycticebus tardigradus, nor in the Galagos. 
Its presence in G. peli is denied by Kingma’. 
Van Campen and Burmeister agree also as to its absence in the Potto* and Tarsius*. 
It is also absent in Chetromys; but the breadth of origin of the rectus in this and 
other forms of Lemuroids suggests that the pyramidalis may be present but included 
in the former. 
b. Dorsal Region (superficial layer). 
Trapezius.—This in Lemur catta is a very thin muscular layer, its anterior (cervical) 
portion being entirely aponeurotic. It arises from the ligamentum nuche as far for- 
wards as about the middle of the neck, also from the spines of the first nine dorsal 
vertebree. It is inserted into the whole length of the anterior margin of the spine of 
the scapula to the extremity of the acromion, and by aponeurosis into nearly half the 
length of its posterior margin. This muscle is crossed and covered at the anterior part 
of its insertion by the levator claviculz. 
In L. varius‘ and L. aanthomystax the anterior part of its origin was not aponeurotic, 
but muscular. The latter has an origin from the eighteenth spinous process; and its 
posterior fibres cover those of the latissimus dorsi at the spine. 
In Galago it is almost the same as in Lemur catta. See G. crassicaudatus, P1. LI. 
fig. 3, and PI. III. figs. 6 & 7, Tz and Tz*, where it is entirely muscular and reaches 
backwards to the eleventh dorsal spine. 
In Nycticebus it only reaches as far as the fifth dorsal vertebra. 
It is small in Loris gracilis (see Cuvier, pl. 67. fig. 1, a2). 
In Tarsius* its origin extends to about the twelfth dorsal vertebra. 
In Cheiromys, according to our specimen, it was almost entirely muscular, and not 
crossed by the levator clavicule, but, on the contrary, entirely hid the latter. It arises 
from the whole length of the ligamentum nuche, the back of the skull, and the first 
seven dorsal vertebra (PI. III. fig. 8, Tz and Tz*). 
THE DEPRESSOR SCAPUL&.—A muscle of this kind has been described by Burmeister ° 
in Tarsius, and also by Kingma’ in Ofolicnus peli. The latter speaks of it as a delicate 
muscular layer arising from the lumbar fascia, becoming thicker and narrower further 
forwards, and attaching itself to the anterior inner angle of the scapula, covering part 
of the latissimus dorsi. 
In Lemur (L. niger) the rhomboideus is quite distinct from latissimus dorsi. There 
is no depressor scapule. 
In all the Galagos we found the rhomboideus well defined from the latissimus dorsi, 
1 Loe. eit. p. 28. ? Op. cit. p. 28. * Loc, cit. p. 45. 
* Indistinetly figured by Cuvier, pl. 69. fig. 2, a*. 5 Loc. cit. p. 46. tab. 3. fig. I. 1, and tab. 4. fig. I. 1. 
5 Loe. cit. p. 46, tab. 3. figs. 1, 2. 7 Loe. cit. p. 22. 
