GLOSSARY. 325 



Orbit Eye socket. 



Oscine Musical. 



Oscine tarsus By ellipsis, tarsus as in oscine birds ; i. e. y its 

 envelope undivided behind and forming a sharp ridge. 



Oviparous Producing eggs which are developed after exclusion 

 from the body, as in all birds. 



Ovommparous Producing eggs which are hatched before exclu- 

 sion, as in the Blind Fish and Garter Snake. 



Palate The roof of the mouth in fishes, a part of the roof of the 

 mouth, lying behind the vomer and in front of the pharyngeals 

 (not to be confounded with either.) 



Palatines Bones of the palate. 



Palmate Web-footed, having the anterior toes full-webbed. 



Papilla A small, fleshy projection. 



Papillose Covered with papillae. 



Paragnathous Having the two mandibles about equal in length. 



Pectinate Having teeth like a comb. 



Pectoral Pertaining to the breast. 



Pectoral fins The anterior or uppermost of the paired fins, in 

 fishes, corresponding to the anterior limbs of the higher 

 Vertebrates. 



Pelage The hair of a Mammal, taken collectively. 



Pelagic Living on or in the high seas. 



Perforate Pierced through; said of nostrils when without a 

 septum. 



Perissodactylous Odd-toed (toes 1, 3, or 5.) 



Peritoneum The membrane lining the abdominal cavity. 



Phalanges Bones of .the fingers and toes. 



Pharyngeal bones Bones at the beginning of the oesophagus of 

 fishes, of various forms, almost always provided with teeth. 



Pharyngognathous Having the lower pharyngeal bones united. 



Pigment Coloring matter. 



Plantigrade Walking on the sole of the foot, as do men and 

 bears. 



Plastron Lower shell of a turtle. 



Plicate Folded ; showing transverse folds or wrinkles. 



Plumage The feathers of a bird, taken collectively. 



Plumbeous Lead-colored dull bluish gray. 



Pollex Thumb ; in birds, the digit which bears the alula corre- 

 sponding to the index finger. 



