calcar 
Cartilaginous structure attached to the tarsus and supporting the interfemoral membrane.
caudal vertebrae 
Bony parts comprising the skeleton of the tail located at the terminal end of the vertebral column.
lumbar vertebrae 
Bony parts of the back located between the thoracic and sacral vertebrae.
cervical vertebrae 
Bony parts of the neck comprising the upper terminal end of the vertebral column.
sacrum 
Bone resulting from the fusion of several vertebrae and located between the lumbar and caudal vertebrae; the pelvis articulates with it.
femur 
Long bone of the hind limb articulating with the pelvis, the tibia and the fibula.
phalanges 
Articulated bones forming the skeleton of the fingers and supporting the interfemoral membrane.
tarsus 
Portion of the foot formed of short bones between the tibia, the fibula and the metatarsus.
phalanges 
Articulated bones forming the skeleton of the fingers and supporting the wing membrane.
carpus 
Portion of the wing formed of two short bones; it is located between the radius, the ulna and the metacarpus.
scapula 
Large thin flat bone; with the clavicle, it serves as an attachment point for the wing.
rib 
Thin curved bone articulating with the vertebral column and the sternum.
sternum 
Long flat bone to which certain ribs are attached; powerful flight muscles are inserted into its crest.