28 
cover of the biceps muscle, into the inner lip of the bicipital 
groove. 
The muscle is quite free from the latissimus dorsi. Its origin 
is excluded from the axillary border of the scapula by the greatly 
extended scapular head of the triceps, which occupies the whole 
of that border lying close to the subscapular muscle. 
The muscle in Marsupials is usually well developed, and has the 
ordinary attachments. It is frequently in connection with the latissi- 
mus at its insertion (e.g., Thylacinus*), and with the subscapularis near 
its origin. In no case is it excluded from the axillary or posterior 
margin, as in Notoryctes. 
In Ornithorhynchus, Owent notes a large teres major. Lecheft 
describes it as consisting of two quite separate and well-developed 
portions, the larger of which, doubtless, corresponds to a muscle which 
Meckel$ regards as the separately developed scapular portion of the 
latissimus, while the other, deeper, shorter, and thicker, corresponds 
to the teres major of the latter author. As already stated, it is the 
first part of Leche which is the true teres major. His second part is 
subscapularis. 
In Echidna, Mivart|| correctly notes tt as a small muscle tendinous 
at origin and insertion, arising from the recurved posterior angle of 
the scapula, and inserted into the prominent ridge running down from 
the lesser tuberesity. 
In Chlamydophorus{ the muscle is large, and “ occupies an extensive 
area of the posterior margin of the post scapula.” It is attached to 
the subscapularis, as also in Tatusia and Dasypus,{i while in all these 
it is separate from the latissimus. 
In some other Edentates, however, it is united with the latter at its 
insertion. 
In Cyclothurus** it is a huge muscle, arising from axillary border, and 
also from spine of scapula, and having close relations to the scapular 
triceps, as well as to the latissimus. Galtont+ notes that Cuvier re- 
garded the muscle as part of the triceps, but maintains that at least 
the fibres arising from the scapular costa are to be regarded as teres. 
Humphryt?+ speaks of the whole muscle as teres; and in the same 
animal he notes a strap-like portion of muscle which passes from the 
angle of the scapula, with the latissimus, to be inserted into the inner 
side of the olecranon and partly into the inner side of the forearm. 
He is doubtful whether this belongs to latissimus or teres. 
Macalister$§ notes that in Orycteropus and Tatusia dorso-epitrochlear 
fibres arise from the teres major. 
In Orycteropus Galton notes the muscle as at its origin completely 
fused with the scapular triceps. || || 
In the Mole the teres major is very large, “‘ perhaps more hyper- 
trophied than any of the arm muscles,” arising from upper two-thirds 
of axillary border, a broad surface on the vertebral border, by an ad- 
ditional slip from the anterior part of vertebral border, and from 
*iv., page 8. + xlv., page 6. }txxvi., page 795. §xxxvii., page 26. 
|| xxxix., page 384, ‘I xxvii., page 245. ** xvi., page 248. tt xvi., page 
249. ttxxil., page 35. §§xxvii., page 246. |llixv., page 078. ‘‘I{ xi, 
page 213. 
