ANATOMY OF THE LEMUROIDEA. 71 
The slip referred to, viz. a roundish belly, terminating in fascia in the middle of the 
length of the femur, near the insertion of the conjoined adductors magnus and brevis. 
With an origin similar to that of the Ringtailed Lemur, the adductor magnus in 
Galago crassicaudatus has an insertion for two-thirds of the upper and postero-inner 
shaft of the femur (PI. V. figs. 19, 20, & 21, Ad.m). 
In Nycticebus tardigra.lus the adductor magnus arises from the tuberosity of the 
ischium for a breadth of 0:4, and is inserted by a broad linear interval from the base 
of the great trochanter to the lower two-thirds of the shaft. This muscle is not 
perforated by the femoral artery. 
According to Burmeister the adductor muscles in Tarsius' are two in number. The 
inner springs from the descending ramus of the pubis, and also from the ascending 
branch of the ischium, and is inserted into the inner side of the linea aspera for rather 
more than half the shaft of the femur. The posterior adductor springs by tendon from 
the tuberosity and the rest of the ascending branch of the ischium, and is inserted into 
the posterior surface of the femur above the last (tab. 4. fig. 5. 12). The inner one of 
Burmeister seems in the main to be our adductor magnus, which, however, is the 
outermost adductor as regards its insertion. 
In Cheiromys we find it is quite as in L. catta. What Professor? Owen describes as 
the adductor magnus, is evidently our quadratus femoris, as we are inclined to think is 
the case with the adductor magnus of Van Campen’. 
Appuctor LonGus.—This the shortest, smallest, and most internally inserted of the 
adductor muscles. It arises from the anterior upper extremity of the symphysis pubis 
and from the so-called horizontal ramus of the pubis, beneath the gracilis. It becomes 
entirely aponeurotic near its insertion, which is into the femur just within and in close 
union with that of the adductor brevis. 
This muscle appears in Cuvier’s plate of L. varius* to be confused with the pectineus, 
what is described as the pectineus being really the psoas. In his figure of Loris gracilis, 
however, they are represented distinctly®. 
It is not quite so short in L. nigrifrons, and it is muscular, with an insertion almost 
to the upper part of the adductor magnus. 
A narrow strip-like plane of muscular fibres represents the adductor longus in the 
Thick-tailed Galago (Pl. V. figs. 19 & 20, Ad./). Its origin is as in LL. catta, and inser- 
tion like that of Z. nigrifrons. It is in close apposition with the pectineus. 
We found a slight difference in the right and left legs of Nycticebus tardigradus. The 
condition in the former was much as in L. catta. We noted that the upper margin of 
its insertion was conterminous with the pectineus, but that the adductor longus descended 
fully 0":3 below it. In the left limb there seemed to be a division between the two 
1 Loe. cit. p. 71. * Loc. cit. p. 65, pl. xxv. fig. 3. 
3 Perodicticus, 1. c. p. 41. 4 Pl. 70. fig. 3, 1. 
© Pl. 67. fig. 2, where J points to the adductor longus, and & to the true pectineus. 
