524 Mr. J, Wood o/z Variations in Human Myology. [May 23, 



border, connected with the "frenum suspensorium." Such slips of the 

 pectoralis major were noticed long ago by Sir Charles Bell (Anatomy, 

 p. 302, 1829). In No 32 a band of fibres, about an inch broad, detached 

 themselves from the lower border of the pectoralis major, and, curving 

 gradually away from the rest down the arm, were inserted into a long 

 roundish tendon about three-eighths of an inch wide, which crossed the 

 brachial vessels and nerves obliquely down and inwards, and joined the 

 internal brachial ligament about 2 inches above the inner condyle. Al- 

 together this was a fair specimen of the Chondro-epitrochlear muscle de- 

 scribed and figured by the author in former papers as presenting a close 

 resemblance to the muscle so called in the Monkeys. It has been de- 

 scribed also by Soemmerring, Caldani, Theile, G-ruber, Cruveilhier, Henle, 

 Hallett, Macwhinnie, and Macalister. In another subject (No. 33) the 

 clavicular fibres of the pectoralis major were uninterruptedly continuous 

 with those of the deltoid, the cephalic vein passing through a foramen 

 low down. Otto seems to have met with this peculiarity, which he de- 

 scribes as absence of the clavicular fibres of the deltoid (Path. Anatom. 

 1830, S. 249). 



5. Pectoralis minor. — Four subjects were found (Nos. 6, 8, 10, & 13) 

 to present an insertion of this muscle into the greater tuberosity of the 

 humerus by a flat tendon usually uniting with that of the supra-spina- 

 tus, but in one case separately inserted, and grooving the upper surface 

 of the coracoid process, where it was provided with a bursa. This ar- 

 rangement was described in the author's last paper as resembling the 

 arrangement in the Mammalia. It has been noticed by Meckel, Har- 

 rison (Dissector, i. p. 79), by Benson (Cycl. Anat. & Phys. i. p. 359), 

 and by Macalister (Journ. Anat. & Phys. No. ii. May 1867, p. 317). 

 In another (No. 9) the upper fibres of the left pectoralis minor were in- 

 serted into a strong costo-coracoid membrane. Those on the right side 

 had become developed into a separate slip of muscle nearly an inch wide, 

 which was inserted into the lower border of the clavicle itself. This 

 slip was connected below with the second rib, constituting an approach 

 towards the formation of a Sterno-clavicular muscle, as described in the 

 author's last paper. , • 



6. Latissimus dorsi. — Pive subjects were aff"ected with varieties in the 

 insertion of this muscle. In two females (Nos. 17 & 24) the abnorma- 

 lity assumed the more common form of " Acliselhogen,^' viz. a short slip 

 across the vessels and nerves to the insertion of the pectoralis major. 

 In a male subject (No. 8) the slip on the right side was connected in a 

 peculiar way with the pectoralis minor, but, on the left, in the common 

 form with the pectoralis major. The former consisted of a flat, vertically 

 placed, muscular slip 1 inch broad, attached below to the upper edge of 

 the tendon of the latissimus dorsi, and above to the lower border of the 

 pectoralis minor about an inch from the coracoid process, covering partly 

 the axillary vessels and nerves. In Nos. 20 & 28 the tendon of the 



