490 Field Museum of Natural History — Zoology, Vol. XL 



Deciduous — Periodically shed, not permanent; as, antlers of deer, which fall off 

 annually or milk teeth, which are replaced by others. 



Digitigrade — Walking on the toes. 



Diphyodont — Having two successive sets of teeth. 



Discoidal — Disk-shaped. 



Diurnal — Active by day. 



Dorsal — Refers to the back. 



Epidermis — Outer layer of the skin; see skin. 



Epiphysis — A cartilaginous part of a bone which ossifies separately and subse- 

 quently becomes anchylosed to the main part of the bone. 



Foramen, pi. foramina — A hole or opening. 



Fossa, pi. fossae — A depression or cavity. 



Fossorial — Burrowing. 



Frugivorous — Fruit eating. 



Hallux — First toe of hind foot; corresponds to big toe in man. 



Heterodont — Having diversified teeth; as, molars, canines, and incisors. 



Hibernate — To become torpid and remain for a certain length of time in a coma- 

 tose condition. 



Homonym — One and the same name for two or more different things. 



Hypsodont — Applied to teeth having long crowns and short roots, such as the 

 molars of the Bovidce. 



Incisors — Front teeth between canines; see chart, p. 12. 



Inguinal — Pertaining to the groin. 



Insectivorous — Insect eating. 



Interfemoral — Between the thighs; used with reference to the membrane between 

 the hind limbs of a bat. 



Interorbital — Between the eyes. 



Interorbital breadth — Breadth of interorbital constriction. 



Jugal or malar bone — See chart, p. 12. 



Lambdoidal ridge — ■ A ridge on side of back portion of skull. 



Mamma, pi. mammae — A teat. 



Mandible — The lower jaw. 



Mastoid breadth — Distance between mastoid processes. 



Meatus — Used here with reference to the opening of the ear. 



Molars — The back cheek teeth; see chart, p. 11. 



Monophyodont — Having only one set of teeth. 



Nares — The nostrils. 



Nocturnal — Active by night. 



Nomen nudum or anonym — Name originally given to something without an 

 accompanying diagnosis or a reference to an identifiable, published figure or 

 plate. 



Nucleated — Having a nucleus or nuclear substance. 



Odontoblast — A tooth cell that produces dentine. 



Omnivorous — Eating food of all kinds and indiscriminately. 



Orbit — Eye socket. 



Palatilar length — Distance from posterior end of palatine bone to posterior base of 

 incisors. 



Pectoral — Pertaining to the breast. 



Pelage — The hair or fur. 



Pencillated — Refers to tuft of long hairs extending beyond the end of the tail. 



