PROFESSOR WOOD ON THE NECK- AND SHOULDER-MUSCLES . 
115 
attachments to the clavicle (x) and sterno-clavicular ligament (%') of the fol- 
lowing muscles, viz. scapulo-clavicular (k), the cleido-mastoid (b), the cleido- 
occipital (c), the levator humeri (b c ) (clavicular fibres of the pectoralis major 
of the human subject), and the sterno-clavicular (T), including the subclavius. 
Fig. 17. Front view of the dissection of the muscles of the neck and shoulder of the 
Guinea-pig ( Cavia vulgaris). A, the muscles “in situ,'' the lettering corre- 
sponding to the foregoing. B, the right scapula and its muscles with the rudi- 
mentary clavicle (x), detached from the trunk, dissected out and turned back. 
Fig. 18. Right side view of the same muscles of the Squirrel ( Sciurus vulgaris) with 
corresponding lettering, showing also the sterno-costalis muscle (n). 
Fig. 19. Right side view of the corresponding muscles, with the same lettering, of the 
Norway Rat or Surmulot (Mus decumanus). 
PLATE XL 
Fig. 20. View of the left side muscles, taken from a dissection of a fawn of the Fallow Deer. 
a , sterno-mandibular (v. maxillaris ) dividing into two slips, one (a 1 ) to the 
angle of the lower jaw, and the other (a! ) to join the homologue of the cleido- 
mastoid (b) and the rectus capitis anticus major (u), and to be attached with 
the latter to the basilar of the occipital, as seen in the Rabbit (in fig. 13) ; e, 
the acromio-trachelien attached to the transverse process of the atlas (1), and 
forming, with b, the levator humeri (b e). The figure also shows the sterno- 
scapular muscle (i). 
Fig. 21. View of the right side muscles of the neck and shoulder of a Donkey. The 
lettering refers to muscles corresponding to those of the last figure. The 
cleido-mastoid (b) passes, in this animal, to the mastoid process with the fibres 
of the rectus lateralis [w), instead of joining those of the rectus anticus major 
04 
Fig. 22. Front view of the muscles of the right side of the neck and shoulder of the 
Pledgehog ( Erinaceus europaeus). The lettering refers to the homologous 
muscles of the preceding. The acromio-trachelien (e) is here seen to form 
the levator humeri alone, and by its relation to the clavicular fibres of the 
deltoid (D) to foreshadow the closer union of these muscles which occurs in the 
two preceding figures. 1, the transverse process of the atlas. 
P. Sternal fibres of pectoralis major. P'. Clavicular fibres of the same 
muscle, showing at their origin a close homology with the levator humeri 
( b c) in the next figure of the domestic Cat. 
Fig. 23. Right side view of the corresponding muscles of the domestic Cat, with the 
same lettering. X shows the position of the rudimentary clavicle, covered 
by the fibres of b and c , which form below the levator humeri ( b c). 
