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 oi 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, pi. bullae — - The swollen portion of the bony part of the external meatus of 



the ear; see chart, p. 12. 

 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 Chironym — Unpublished or manuscript name.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. 



489 



