129 



15. The subscapulo humeral I found very commonly— over fifteen 

 times during the last session; but this, I believe, is a very unusual de- 

 gree of frequency. In one instance it was especially strong and dis- 

 tinct (this specimen was exhibited before the Surgical Society of Ire- 

 land, and is recorded in the " Medical Press and Circular," vol. iii. 

 p. 79). Mr. "Wood has found this in one instance since my first publi- 

 cation of this anomaly. It was described first by Wenzel Gruber, of 

 St. Petersburg, in his " Abhandlungen aus die menschlisch. und ver- 

 gleichen. Anat." Petersburg, 1854, p. 109. 



16. The coraco-capsular of Wood I have found in one instance cross- 

 ing, but unattached to the capsule of the shoulder, and inserted into the 

 inner lip of the bicipital groove, in common with the upper border of the 

 tendon of the latissimus dorsi, which did not extend quite as far out- 

 wards as usual. This is the third instance in which I have noticed its 

 presence. Mr. Wood has met with it five times, and has given an ac- 

 curate account of it (" Journal of Anatomy and Physiology," vol. i., 

 p. 48). Mr. Wood has inferred from its comparative, as well as from 

 its human anatomy, that it represents the short part of the adductor 

 mass ; but I have given below some reasons for believing it to be the 

 representative of the pectineus, and I wish here to state that I with- . 

 draw my previously published belief that it represented the quadratus 

 femoris. 



17. I have met with another specimen of the extensor primi inter- 

 nodii pollicis et indicis, similar in all respects to the specimen de- 

 scribed before, and co-existing with the four typical extensors. 



18. An extensor medii digiti existed in two cases in the subject; it 

 lay parallel to the extensor indicis, and arose from a space of about 

 two inches in extent from the back of the ulna, and it was inserted 

 into the base of the second phalanx of the middle finger, joining with 

 the medial tendon of the extensor communis digitorum. Wood has 

 described several instances of this anomaly ; and Meckel has given an 

 instance in which the extensor indicis sent off three tendons to the 

 second, third, and fourth fingers: Henle's " Muskellehre," p. 213. 

 In one arm of a muscular male subject I found this anomaly to co- 

 exist with a completely cleft biceps, an extensor digitorum brevis 

 manus for the second, third, and fourth fingers, and an interchange of 

 tendons between the radial extensors of the carpus, a slip from the 

 longus being inserted with the brevis, and vice versa. 



19. An extensor quarti digiti, nearly separate for its whole length 

 from the extensor minimi digiti, existed in another forearm, and com- 

 pleted the second group of extensors. The increase in number of the 

 slips of this second series is interesting, as bearing upon the compara- 

 tive anatomy of the dorsal muscles of the forearm. As in the otter 

 (Lutra vulgaris), I have found the extensor digitorum communis send- 

 ing a tendon to the pollex, and one to the second and third toe ; but 

 the extensor minimi digiti sending tendons to the second, third, fourth, 

 and fifth toes. Mr. Huxley, in the Hunterian Lectures for 1865, like- 

 wise mentions that this muscle supplies the three inner toes in the 



