| OCR Text |
Show 384 DR. B. C. A. WINDLE AND MR. F. G. PARSONS ON THE [Apr. 6, the same animal; still, so far as our observations go, the four-layered muscle is the most generalized type and corresponds to the human three-layered pectoralis major and the pectoralis minor. The above description corresponds as closely as can be expected with Allen's Procyon lotor (XXVI.). Procyon cancrivorus (57) agrees with P. lotor except that /3 is inserted largely into the shoulder capsule, while 5 was not distinguished. The Mustelidae resemble Fig. 7. i4- - - P£C TORffl /s PFCT.QUflR: &C/PEft. Tk OSL Pectoral muscles and panniculus of Lutra vulgaris. the Procyonidae in the feeble development of the pectoralis quartus (see fig. 7) ; in some animals, however, e. g. Proteles (25), this part is much more marked, rising from a considerable distance back along the linea alba and being connected by the panniculus to the latissimus dorsi in such a manner that the floor of the axilla is quite closed in by muscular fibres. In the Hyaenidae the muscle is very strong and is inserted into the whole length of the humerus: moreover it does not appear to be as broken up as in other Car- |
