12 MESSRS. MURIE AND MIVART ON THE 
planes of its fibres, so that two muscles could be reckoned—the smaller being the 
anterior with a less insertion into the femur. 
In comparing Burmeister’s description with our own, we cannot say whether this 
muscle or adductor brevis is represented by his posterior adductor. ‘ 
In Cheiromys it is exactly as in L. catta. What Owen* describes as the adductor 
longus, is apparently both our adductor longus and adductor brevis. 
The ADDUCTOR BREVIS? is a shorter muscle than the adductor longus, but is much 
thicker at its origin, where it is more or less separable into two parts, which become 
completely blended together below. It arises from the pubis beneath the origin of the 
gracilis; and its fibres, radiating as it descends, are inserted into the back of the femur 
internally to the insertion of the adductor magnus. Its insertion extends about “4 of 
an inch higher up the femur than that of the adductor magnus, but does not extend so 
low down as that muscle by as much as 1-2 inch. 
Figured in Galago crassicaudatus (Pl. V. figs. 19 & 21, Ad. 0). 
In Nycticebus the adductor brevis is longer than the adductor longus, and is much 
narrower ; it arises by a narrow tendon just in front of the tuberosity of the ischium, 
beneath the gracilis. ‘The fibres below join those of the adductor magnus, and they 
are inserted together. 
Van Campen® speaks of a fourth adductor as existing in Perodicticus, arising from 
the horizontal ramus of the pubis, beneath the pectineus, and going to the small tro- 
chanter of the femur. As before said, we cannot determine the representative of this 
muscle in Tarsius. 
In Cheiromys we found the adductor brevis substantially as in L. catta, its tendency 
to division quite as much pronounced. 
TENSOR VAGINA FEMORIS‘:—We are inclined to agree with Meckel in considering this 
muscle to be absent in Lemur, as the part so named by Burmeister in Zarsius seems 
rather to be a mere portion of the gluteus maximus. In all our Galagos but one we 
also failed to detect any trace of this muscle; in one specimen of G. crassicaudatus, 
however, there appeared to be some muscular fibres arising from the crest of the ilium 
and inserted into the fascia lata, which was of unusual strength. We have not, how- 
ever, thought proper to introduce this into our plate as a distinct muscle, partly because 
of its very exceptional occurrence, and partly because we do not feel sure that it is not 
rather to be considered an exceptional development of the gluteus maximus. 
In Nycticebus some fibres come from the lower belly to the groin, which may represent 
the muscle in question. 
In Tarsius* the muscle described as tensor fasciz late is, according to our view, only 
part of the gluteus maximus. 
1 
Loc. cit. p. 65, pl. xxv. fig. 2, no, 12. 
* As before said, in Cuvier’s figures this is not marked off from the adductor magnus. % Loe. cit. p. 42. 
* This muscle is not represented in Cuvier's plates of the Lemuroids. 5 Loc. cit. p. 68, tab. 3. fig. 1, 4a. 
