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BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
EXPLANATION OF PLATES. 
Tue figures are all reproduced from natural size skiagraphs of the polydactyle 
specimens; in every plate the distal ends of the extremities are down, but right 
and left are reversed. Right extremities therefore appear as left in the figures, 
and vice versa. 
asg. 
cac. 
cub. 
cun. 
ec’cun. 
en’cun. 
ext.com.dg.i. . 
ext. mt’carp. mag. 
ext. mt’carp. ob. 
ext. prp. . 
ext. prp.eX. « 
ext. prp. t. 
fix. perf. . 
ABBREVIATIONS. 
Astragalus. jiziperf. 
Calcaneum. Gin. 5 
Cuboid. ms’cun. 
Cuneiform. mt’carp. . 
Ectocuneiform. mt’tar. 
Entocuneiform. nav. 
Extensor communis iM. 3 
digitorum internus. n. uln. 
Extensor metacarpi os.mag. 
magnus. pnIg. -« 
Extensor metacarpi Pie ih 
obliquus. soph... 
Ext. proprius pollicis es 
et indicis. ined. 
Extensor proprius ex- un. 
ternus. Veo 
Extensor proprius in- 1-0 05% 
ternus. 
Flexor perforatus. 
Flexor perforans. 
Lunar. 
Mesocuneiform. 
Metacarpal. 
Metatarsal. 
Navicular. 
Median nerve. 
Ulnar nerve. 
Os magnum. 
Phalanx. 
Pisiform. 
Scaphoid. 
Trapezium. 
Trapezoid. 
Unciform. 
First to fifth digits. 
First to fifth branches 
of the median nerve. 
