70 MESSRS. MURIE AND MIVART ON THE 
expansion, and is inserted by a fascia into the outer part of the ligamentum patellee 
and capsule of the knee-joint.” 
The Sarrortus, a wide and thin muscle, arises from the inferior (anterior) margin of 
the ilium at its posterior (lower) half, and is inserted in common with the gracilis into 
the tibia. 
Cuvier figures it in Z. varius (0. c. pl. 70. fig. 3,4) and in Loris gracilis (1. ¢. pl. 67. 
fig. 2, ¢). That of Galago crassicaudatus is delineated in Pl. IL fig. 3, and Pl. V. 
fig. 19, Sa. 
Burmeister describes and figures it in Tarsius, p. 73, tab. 3. fig. 1. 15; and Owen in 
Cheiromys, p. 64, pls. 24, 25, no. 15. 
The GRaciLis is very broad, especially at its origin, which extends along the whole 
length of the symphysis pubis, nearly half the anterior (superior) margin of the so- 
called horizontal ramus of the pubis, and for about a quarter of an inch along its 
so-called descending ramus. It passes downwards and outwards, and at rather more 
than an inch from its insertion it becomes intimately connected with the semiten- 
dinosus, and afterwards with the sartorius, the three being inserted by a common 
tendon into the outer side of the anterior surface of the tibia, about half an inch below 
the patella. 
It is figured by Cuvier in Z. varius (1. ¢. pl. 70. fig. 3, u) and in Loris gracilis (1. ¢. 
pl. 67. fig. 2,w). The gracilis in Zoris gracilis has two heads, as Meckel says; but the 
apparent third head is really the semitendinosus, which muscle also joins the gracilis in 
Nycticebus. 
In Galago it is inserted along with the sartorius, which partially overlaps and hides it. 
G. crassicaudatus (Pl. I. fig. 3, and Pl. V. figs. 19 & 20, Gr) shows its origin and 
insertion, the muscle being relatively smaller than in our type. 
There is little or no difference presented in Nycticebus'. We did not find the division 
spoken of by Meckel?. 
In Tarsius* it is very small indeed, the smallest of all the thigh muscles. 
In Cheiromys* it is much as in Lemur catta. 
Appuctor MAGNUS.—This is the longest, largest, and most externally inserted of the 
adductors. It has a strongly tendinous origin from the margin of the so-called descend- 
ing ramus of the pubis; the origin of the posterior part of the gracilis being superficial 
to it. It is inserted into rather more than the middle third of the femur. 
The distinction between this muscle and the adductor brevis is not defined in Cuvier’s 
plate of Z. varius, but they are together marked /' and /’, pl. 70. fig. 3. The same is the 
case in Loris gracilis, pl. 67. fig. 2, 7 and 0’. 
In L. wanthomystax, the limb having been separated from the body, the origins of 
the adductors were severed; therefore the origin of the following slip was not noticed. 
' P. Z. 8. 1865, p. 249. * Anat. Comp. vol. vi. p. 397. 
* Loc. cit. p. 74, tab. 3. fig. 1, no. 14, * Loe. cit. p. 65, pl. 64. no. 14, 
