CHAPTER i 

 GLOSSARY, 



ABDOMEN, the part of the body between the thorax and the 



extremity of the pelvis. 

 ACETABULUM, the socket of the hip-joint in vertebrates; in 



invertebrates, a fleshy sucker on the arm of a cephalopod. 

 ACROMION, the curved, flattened process of the mesoscapula or 



spine of the shoulder-blade. 

 ALISPHENOID, one of the greater wings of the sphenoid bone 



of the skull. 



ALVEOLUS, a socket, as of the teeth. 

 AMPHICCELOUS, concave at both ends. 

 ANAPOPHYSIS, the lower and more slender back war dly projecting 



process of the neural arch. 

 ANCHYLOSIS, the same as ankylosis. 

 ANGULARE, the principal element of the lower jaw in the tailless 



amphibians. 

 ANGULO-SPLENIAL, the inner element of the lower jaw in the 



tailed amphibians. 

 ANKYLOSIS, the coalescence of two bones so that they become 



immovably united. 

 ANNULARIS, the third finger. 

 ANOUROUS, having no tail. 

 ANTERIOR, in the fore part. 

 ANTIBRACHIAL MEMBRANE, that part of a bat's wing which 



extends above the arm. 

 ANTIBRACHIUM, the fore arm consisting of two bones, the 



radius and the ulna. 

 ARTICULATED, jointed. 



ASTRAGALUS, the ankle bone immediately below the tibia. 

 ATLAS, the first of the neck vertebrae, the one on which the head 



is carried. 

 AXIS, the second of the neck vertebras, that on which the skull and 



atlas rotate. 

 BASI-DORSALIA, the vertebral elements forming the neural arch 



in reptiles. 



BASIHYAL, the outermost of the benes of the tongue. 

 BASI -OCCIPITAL, the bone in the skmll nearest to the axis of the 



vertebral column. 

 BASI-SPHENOID, the [bone in the skull immediately in front ot 



the basi-occipital. 

 BICUSPIDS, the premolar teeth. 

 BRACHIUM, the upper arm. 

 BRACHYODONT, having short crowns and long roots (applied to 



teeth). 

 BUCCAL, pertaining to the mouth cavity or to the cheeks. 



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