524 Mr. J. Wood on Variations in Human Myology. [June 18, 



equally in the two sexes. The extensor carpi radialis longior (with the 

 accessorius) and the extensor communis digitorum are found abnormal in 

 12 subjects, and the extensor secnndi internodii in 11. These numbers 

 accord, relatively and proportionately, pretty closely with their parallels in 

 last year's series. 



The greatest number of abnormalities in each subject is found in the 

 males : — No. 7 having no less than 25 (the greatest number, it is believed, 

 ever found in one subject), of which 1 7 are in the arms, and 5 only in the 

 legs ; and No. 1 1 having 24, of which 14 are in the arms and 6 in the legs. 

 No. 17 has 20, of which 13 are in the arms and 7 in the legs. In all these 

 the greatest number is found in the arms. But, on the other hand, we 

 find that No. 4, having also 20 abnormalities, has 9 in the arms and 10 in 

 the legs. 



Of the females. No. 33 has 20 abnormalities, of which 15 are in the 

 arms and 5 in the legs; while No. 29 has also 20, of which 11 are in 

 the arms and 8 in the legs. In some, the proportion of the number of ab- 

 normalities in the arms to those in the legs'is even greater than the above — 

 as, for example, in the males No. 10 (in which it is 11 to 1), No. 13 

 (12 to 2), Nos. 2 & 6 (10 to 2), and in the females No. 31 (12 to 2), 

 and No. 23 (10 to 2). In the male No. 1 the abnormalities in the arms 

 and legs are equal, 6 in each; and in the female No. 21 they are also 

 nearly equal, 8 in the arms and 7 in the legs. In only one subject, the male 

 No. 8, is the number of abnormalities in the legs (8) greater than that 

 in the arms (4). The smallest number of abnormahties is in No. 14 (male), 

 viz. 5 in the arms and 2 in the legs; and in No. 26 (female), 1 proper 

 to the head, 2 connected with the arms, and 1 in the legs. 



In estimating the total number of abnormalities, both sides of the body, 

 when alike or nearly alike, and complications aifecting mutually two or 

 more neighbouring muscles, are, for the sake of convenience, reckoned as 

 one instance. 296 are found in the 18 males, and 262 in the 18 females, 

 making a grand total of 558. Of the 296 in males, 13 are found in the 

 muscles proper to the head and neck, 24 in those connected both with 

 the head and neck and arm, 182 belonging to the arms only, and 77 to 

 the legs only. Of the 262 in females, 7 are found in those proper to the 

 head and neck, 1 6 in those connected with the head and neck and arms, 

 168 belonging to the arms only, and 71 to the legs only. 



The proportion of those in the arms to those in the legs in the two 

 sexes is much more nearly equal in this year's than in last year's subjects 

 (in which the latter predominated), and amounts to about 5 in the arms 

 to 2 in the legs. All the lines of variation observed in former years, ex- 

 cept the occipito-scapular, supracostalis, and a few other less important 

 muscles, have been noted in this year's series. 



Of the 296 abnormalities found in the 18 males, 173 have been found 

 on both sides, 62 on the right side only, and 61 on the left side only, 

 making 123 single or one-sided specimens. Of the 262 found in the 18 



