GLOSSARY. 
Allantoic— A membranous sac-like appendage for effecting oxygenation and 
other changes in the blood, developed from the posterior part of the alimentary 
tract in the embryos of mammals and other vertebrates. 
Anchylose — To grow together; to unite and become immovable. 
Alisphenoid — Pertaining to the greater wings of the sphenoid bone. 
Alveola — A pit or cavity; as the socket of a tooth. 
Arboreal — Tree dwelling. 
Antorbital foramen — Infraorbital foramen. 
Audital bulla (see Bulla). 
Axilla — Hollow space between junction of the arm and shoulder; armpit. 
Basal length (of skull) — Distance from lower edge of foramen magnum to extreme 
end of premaxillary in front of incisors. 
Basilar length of Hensel (of skull) — Distance from lower edge of foramen magnum 
to the posterior alveola border of a middle incisor. 
Bicolor — Having two colors. 
Bicuspid — With two cusps. 
Bifid — Divided into two parts. 
Brachydont — Having a low or short crown. 
Brain case — The part of the skull enclosing the brain. 
Bulla, pl. bulla — The swollen portion of the bony part of the external meatus of 
the ear; see chart, p. I2. 
Caecum — A sac or pouch open only at one end, which is situated at the junction 
of the large and small intestines; see page 22. 
Canine teeth — See chart, p. 11. 
Carnassial teeth — See chart, p. 14. 
Calcar — A bony cartilage extending from the tarsus along the edge of the inter- 
femoral membrane in bats. 
Carnivorous — Flesh eating. 
Carpus — Bones forming the wrist joint. 
Caudal — Refers to the tail. 
Cheek teeth —- Teeth on side of jaw posterior to the canine. 
Chironym — Unpublished or manuscript name. 
Clavicle — The collar bone. 
Cloaca — The common cavity into which the hind part of the alimentary canal as 
well as the urinary and generative ducts open. 
Conch — The external ear. 
Condyle — A protuberance on the end of bone forming a point of articulation with 
another bone. 
Cortex — The part of a hair which surrounds the cellular center and which contains 
the color pigment. 
Crepuscular — Active at twilight. 
Cuticle — The epidermis or outer covering of the true skin; see skin. 
Cusp— A point or protuberance on crown of tooth. 
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