32 MESSRS. MURIE AND MIVART ON THE 
D. Anconeus quartus (the anconeus proper of Man). 
E. Anconeus quintus' (the dorso-epitrochlear). 
F. Anconeus sextus? (the lower part of the internal head of Man). 
In Cheiromys Professor Owen* found the lower portion of the inner head of this 
muscle almost as distinct as it is asserted to be by Burmeister in Tarsius. In our dis- 
section we can confirm this statement; but we found the origin of the upper part of the 
internal head (which is not distinctly mentioned by Professor Owen) to extend up as 
high as in Lemur and in the other forms already noticed. Thus the so-called triceps 
may here, as also in Hyrax (and, no doubt, in many other forms), be more correctly 
spoken of as the quadriceps extensor; and we remark that the aspect of the part called 
“sextus” by Burmeister, lying as it does beneath the others in the intercondyloid space, 
may perhaps be compared to the crureus of the thigh, so distinct in the Lemuroids. 
Ancongus.—Evidently but the continuation of the triceps. It may be said to arise 
from the posterior aspect of the external condyle, and to be inserted into the radial 
border of the olecranon. 
In Cuvier’s ‘ Recueil,’ pl. 69. fig. 1, no separate letter indicates the anconeus, but a 
darker shade seems nevertheless to point to its existence in L. varius. 
The three species L. varius, L. vanthomystax, and L. nigrifrons do not entirely agree 
with the above description, inasmuch as the anconeus muscle crosses over much of the 
intercondyloid space. 
Figured in Galago crassicaudatus (P\. U1. fig. 3, and more distinctly in Pl. IV. 
fig. 13, Anc). 
It is present in G. peli*, and named anconeus quartus. 
Van Campen says it is wanting in the Potto (Perodicticus’). 
In Tarsius this is described as the anconeus quartus°. 
Very large and distinct in Chetromys. 
Dorso-EPITROCHLEAR.—This takes origin from the outer margin of the latissimus dorsi 
near its insertion (7.e. just before it becomes tendinous); it broadens out into a thin 
muscular sheet, and becomes continuous with the fascia of the forearm’ between its 
two insertions, which are into the inner condyle of the humerus and the olecranon. 
It arises over the tendinous part of the latissimus dorsi and goes to the shaft of the 
ulna in LZ. varius, as Cuvier already has shown, pl. 69. fig. 1, ¢°. 
See Galago crassicaudatus (P1. II. fig. 3, Pl. II. figs. 5, 6, & 7, and Pl. IV. figs. 13 
& 14, D.ep). 
In G. allenii this muscle does not so broaden out as in Lemur catta, but it is also 
inserted into the inner side of the olecranon process. 
Tn Yarsius Burmeister ® notices this offshoot from the latissimus dorsi under anconeus 
quintus, as before mentioned by us in describing the triceps. 
Tab. 3. fig. 2. 22d. 7 Tab.3. fig. 2.22. * Loe. cit.p.61. + Kingma, loc. cit.p.25. * Loc. cit. p. 34. 
® Loe. cit. p. 54. 7 Mentioned by Meckel, loc. cit. p. 267. ® Loe. cit. p. 50, tab. 3. fig. 22, . 
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