APPENDIX, 



571 



WiugS (Conlinued). 



95. Edge of the -wiilg {Camptmmn ; ^fargo carpi). The small featliers covering the an- 



turioi- eilye of the wing, both along the f'ureann and the hand or first joint, including 



the bend of the wing. 



G. The Legs (Pedes). 



96. Legs {P((ks). The posterior pair of limbs inserted in the pelvis, and used in walking or 



riinnint;. 



97. Thigh {Femur). The basal joint of the leg, its head articulating with the pelvis. This 



is generally imbedded in the tlesh, and covered by the skin so as not to be appreci- 

 able, especially in the prepared specimen. 



98. Shin {Tibia). The second or middle joint of the leg, articulated above to the thigh, 



below to the tarsus. The upper part, sometimes the whole, is enveloped in flesh, 

 and covered by skin and feathers; sometimes the lower extremity is covered by horny 

 plates, the 



99. (Cnemidium). 



100. Foot joiut ( Puclarlhnim). The junction of the tarsus below with the foot. 



101. Podotheca (Pmhtlieca). The horny or skinny covering of lower til)ia, tarsus, and feet. 



102. Kuee ( Giiiu). The junction of the thigh with the leg, usually concealed by the skin. 

 10.3. Heel joint {Sujfrayo). The junction of the leg with the tarsus. 



103A. Tarsus {Tarsus). The third joint of the leg and next to the tiliia ; covered generally 

 with born, sometimes with naked skin or feathers, never with flesh ; the toes are ar- 

 ticulated to its lower extremity. This joint corresponds to the ankle joint of tlic human 

 body. 



104. Instep, or Front of tarsus {Acrotarsium). The anterior face of the tarsus, 



usually covered by small plates, which in the higher groups are united into one ; 

 sometimes covered by skin. 



105. Side of tarsus {Paralarsium). 



106. Back of tarsus {Planta larsi). Homologically the Sole {Pkinta). 



107. Heel (Ca'caHcus; Talus). The upper posterior extremity of the tarsns. 



108. Spur [Calcar). Any bony sharp process or spine implanted on the tarsus, as 



in the rooster. 



109. ScuteWss {Scutelhi). The succession of small, usually rectangular plates, applied 



against the anterior face of the tarsus, and the upper surface of toes. These 

 sometimes encircle the tarsus completely, meeting on the inner side; sometimes 

 reach half round with similar half rings on tlie back side of the tarsus ; are some- 

 times divided into polygonal plates ; are sometimes fused into a continuous plate, 

 cither anteriorly or laterally. Modifications of structure in this respect indicate 

 differences in rank and systematic position of the highest value. 



110. Scutellate tarsus. When the tarsus is covered with transverse or polygonal 



scales, as described above. 

 1 1 1 Booted tarsus. Where ihc anterior face is covered with a contiuuous horny 



plate not divided into seutella;. 



112. Foot (Pis). The toes and tarsus taken together. 



113. Top of foot (^4cropoc?/Hni). The entire upper surface of the foot. ~ 



114. The track (Pe/!«a). The entire lower surface of the foot. 



115. Heel pad (Ptevra ; Tubtr). The posterior portion of the /;eZ«io, immediately under 



the joint of the foot, and freijuently prominent. 



