352 REPORT OF NEW JERSEY STATE MUSEUM. 
Archinephric duct. ‘Tube connecting the embryonic pronephros with the 
cloaca, 
Articular. Bone of lower jaw supporting dentary. 
Articulate. Jointed. 
Astragalus. Inner tarsal bone. 
Atlas. First vertebra. 
Atrophy. Non-development. 
Attenuate. Wong and slender, as if drawn out. 
Auditory capsules. Posterior region of skull on each side of the brain-case. 
Auditory nerves. Eighth pair of cranial nerves, supplying the organ of 
hearing. 
Auricle. A chamber of heart. 
Autogenous, Self-produced, as skeletal parts developed from ossification 
centers. 
Autostylic. Having the mandibular suspensorium suspended by the quadrate. 
Axis. The second vertebra. 
Azygous. Occurring singly. 
Basioccipital. A lower median hind bone of the skull which attaches the 
atlas. 
Basis cranii. ‘The basioccipital, basisphenoid and presphenoid together at the 
base of the skull. 
Basisphenoid. Bone in front of basioccipital forming the floor of the skull. 
Beak. Any bill-like structure. 
Biceps. A double-headed muscle. 
Bicolor. ‘Two-colored. 
Bicuspid. With 2 points. 
Brachial veins. Veins carrying the blood from the fore limb to the sinous 
venosus, 
Branchie. The gills or respiratory organs of most salamanders and young 
amphibians. 
Bridge. Junction of the carapace, at the sides, with the plastron, in turtles. 
Buccal. Relating to the mouth. 
Bulbus aorte. A ramification of the conus arteriosus. 
Caducous. Soon falling off. 
Cecal. Of blind sack-like form. 
Cecum. Blind sack-like appendage connected with alimentary canal at pos- 
terior end of stomach. 
Calcaneum. Outer tarsal bone. 
Calcar. Spur on inner hind edge of foot. 
Canines. Any conical teeth in jaws longer or larger than the others. 
Capitular. In form of a small round body like the head of a rib. 
Carapace. Upper shell of a turtle, usually composed of bony plates covered 
with horny scales. 
Cardiac vein. Vein from the heart to the abdominal vein. 
Cardiform teeth. Coarse and sharp teeth, like wool cards. 
Carinate. Keeled, usually with reference to a ridge along median line. 
Carotid artery. A division of the carotid trunk. 
