416 



The Journal of Heredity 



The three last interdigital patterns, 

 those of the upper row, are, with the 

 exception of the first one of this row, 

 really the second interdigital, on the 

 left hand of Mabel, large and well- 

 developed, rather better, in fact, than 



in most cases in the M ■ hands. 



There is again almost a failure of the 

 hypothenar, also in the left hand of 

 Mabel, which shows the other lack. 

 The right thenar of May is also weak, 

 but well indicated. In only one of the 

 four was the little extra loop (= first 

 interdigital) printed, the left of May, 

 but the prints are probably deficient in 

 this region in the others, owing to 

 faulty technique in printing. 



The feet of both sets, as in the case 

 of the hands, happen to be decidedly 



similar to the M s, and with the 



same slight discrepancies, occasionally 

 amounting to a lack of harmony in one 

 of the main features, as has been no- 

 ticed in the hands. For instance, note 

 the third interdigital of the left feet 



of the two M s, where the ridges 



taper to a point, but develop no lower 

 triradius, as in the rights ; also the 

 fourth, or last, interdigitals of the two 

 B s, which show but one real pat- 

 tern out of the four, the one on the 

 right foot of May. 



RESEMBLANCES CONTROLLED BY GERM- 

 PLASM 



Recapitulating, the general similari- 

 ties, with various minor departures 

 therefrom, appear in these two cases 

 about as in other typical cases of twins 

 that closely resemble each other, and 

 which, for these and other reasons, may 

 be considered duplicates. The resem- 

 blance is close, but not exact, and never 

 extends to the ridge details, the minu- 

 tiae of Galton. The conclusion is hard 

 to avoid, that, as has been done by 

 Newman and Patterson in the similar 

 correspondence of the ridges of the 

 carapace of armadillos, the corre- 

 spondences are of those parts that are 

 under the control of the germ-plasm, 

 and that where there is no definite cor- 

 respondence the development is left 

 to other forces, whatever they may be. 



The bodily measurements of the B 



twins were taken in the nude by a grad- 

 uate student. Miss Margaret Washing- 

 ton, and constituted a part of the similar 

 careful measurements of 100 students 

 used in the preparation of a thesis. 

 These twins were taken towards the 

 end of the series, after the measurer 

 had had the greater part of her prac- 

 tice, and ihe results may be relied upon 

 as accurate. The measurements were 

 taken in millimeters by the anthro- 

 pometer of Martin, made by R. Her- 

 mann, of Zurich, with the occasional 

 use of other instruments from the same 

 source. Miss Washington followed, 

 both in the selection of the measures 

 to be used and the technique by which 

 the measures were taken, the Interna- 

 tional Prescription of the Congress of 

 Geneva, in 1912. 



The measurements of the two are as 

 follows : 



May Mabel 



Total stature 1668 1669 



Arm stretch 1631 1621 



Height ; tragus 1522 1521 



Height ; vertebra prom 1431 1431 



Height; incisura sterni 1361 1360 



Height ; acromion 1349 1361 



Height; nipple 1248 1233 



Height ; umbilicus 1030 1020 



Height ; ant, spine il 966 964 



Height; trochanter 911 891 



Height ; symphysis 879 885 



Height : olecranon 1055 1080 



Height ; stjdoid radius 822 838 



Height ; end middle finger .... 621 639 



Breadth ; biacromial 340 337 



Breadth: cristal, il 255 254 



Breadth; spinal, il 250 256 



Breadth ; trochanteric 205 205 



Breadth ; nipples 190 195 



Breadth ; thorax 232 236 



Depth; thorax 175 175 



Length; foot 254 251 



Stature ; sitting 848 840 



Vert, prom ; sitting 620 613 



Incisura sterni ; sitting 551 530 



Acromion ; sitting 539 530 



Head length 185 185 



Head breadth 142 142 



Frontal breadth 97 96 



Breadth between eyes 28 27 



Zygomatic breadth 116 116 



Breadth of jaw, angle 96 95 



Chin-hair length 185 188 



Chin-nasion length 122 122 



Nasion-prosthion 76 76 



{Continued on page 419) 



