668 GLOSSARY 



Hallux, the first digit of the pes, or great toe. 



Herbivorous, plant-eating. 



fHomalodotheres, see fEntelonychia. 



Horizontal ramus, the tooth-carrying part of the lower jaw. 



Humerus, the bone of the upper arm. 



Hyoid arch, a series of bony rods, attached to the base of the cranium, for 



support of the tongue. 

 fHyopsodonta, an extinct suborder of the Insectivora. 

 Hypsodont, high-crowned teeth, with late-formed roots. 

 Hyracoidea, Klipdases, an order of hoofed mammals. 



Ilium, the anterior element of the hip-bone. 



Inferior maxillary, the lower jaw. 



Infraclass, division of subclass. 



Insectivora, Moles, Shrews, etc., an order of placental mammals. 



Ischium, the postero-superior element of the hip-bone. 



John Day stage, upper Oligocene of N. W. America. 

 Jugal, the cheek-bone. See Malar. 

 Jurassic, the second of the Mesozoic periods. 



Lachrymal, a small bone on the front edge of the orbit. 



Lachrymal foramen, a canal for the tear-duct piercing the lachrymal bone. 



Lemuroidea, Lemurs, suborder of the Primates. 



Lemurs, see Lemuroidea. 



Limb-girdles, the bones which attach the limbs to the body. 



Lipotyphla, suborder of the Insectivora. 



fLitopterna, extinct order of hoofed mammals. 



Loricata, Armadillos and Gl,yptodonts ; the armoured Edentates. 



Lumbar vertebrae, those of the loins. 



Lunar, the middle bone in the upper row of the carpus. 



Magnum, the middle bone in the lower row of the carpus ; supports the third 



digit or middle finger. 

 Malar, cheek-bone. See Jugal. 

 Malleolar bone, the lower end of the fibula, persisting as a separate bone after 



loss of the shaft. 

 Malleolus, external, the lower end of the fibula. 

 Malleolus, internal, process from the lower end of the tibia. 

 Mammal, a warm-blooded vertebrate, which suckles its young. 

 Mandible, the lower jaw. 



Manubrium, the anterior segment of the breast-bone. 

 Manus, the hand or fore foot. 

 Marsupial, see Marsupialia. 



