Dwight.] 



120 



[March 17, 



EIGHT. LEFT. TOTAL. 



Female Present 80 83 103 



Wanting 34 26 60 



Total 114 109. 223 



Per cent, present 71 76,1 73 



Both Sexes Present 260 272 532 



Wanting 79 (SI 141 



Total 339 334 673 



Per cent, present 76.6 81.4 70 



The above table of sides only shows the muscle present only in 83 per 

 cent, of the male sides, in 73 per cent, of the female, and in 79 per cent, 

 of those of both sexes, which, however, were unequal. It was somewhat 

 more common on the left. 



The next table shows the results in the same series of two hundred and 

 fifty subjects which was used for the psoas parvus. 



PrRAMIDALTS RECORDS OF BOTH SuDES IK 250 SUBJECTS, OP WhICH 



165 Were Male and 85 Female. 



MA7>E. FEMALE. 



Present on both sides 125 =: 75.6% 58 — 68.1 % 



Present on neither side .. . 25 = 15.1 22 = 25.9 



Present on right side -, 



only 5 I 



Present on left side M^ — ^-^ 



only 10 J 5J 



Total 165 = 99.7 85 = 99.8 



5= 5.8 



BOTH SEXES. 



183 = 73.2% 

 47 = 18.8 



20= 8.0 



15 J 



250=100.0 



This shows, in addition to what was shown by the preceding table, that 

 the two sides were alike in 92 per cent. 



We must now subdivide this series into smaller groups according to the 

 presence or absence of pyraraidalis and psoas parvus considered collec- 

 tively. 



Records of Both Muscles on Both Sides in 350 Cases, op Which 

 165 Were Male and 85 Were Female. 



GROUP. 



A. 



Pyramidalis and 

 psoas parvus on 

 both sides. 



.SEX. NUMBER. PER CENT. 



Male 48 29 



Female 16 18.8 



Both sexes 64 25.6 



