Hurter — Herpetology of Missouri. 259 



Nares.— Openings of the nose; external and internal. 



Nasal plates.— Plates about the external nares. Serpents. 



Nuchal.— Pertaining to nape of neck. Turtles. 



Occipital.— Belonging to the hinder part of the head. Occipital plate 



in serpents. 

 Ocellated.— Furnished with eye-like spots, spots consisting of concentric 



rings. 

 Opisthocoelous. — Said of vertebrae which are concave at the hinder end 



and convex at the anterior end. 

 Oviparous. — Producing young from eggs that hatch after deposition. 

 Ovoviviparous.— Producing young from eggs which hatch before being 



laid. 

 Palatine.— A bone of the roof of the mouth lying behind the vomer. 

 Palmate. — Webbed. 



Papillose. — Covered with papillae or small fleshy projections. 

 Parasphenoi'd. — A broad bone underlying the brain case. Pharasphe- 



noldal teeth are found in the hinder part of the roof of the mouth. 

 Paratoid. — A projecting gland behind the jaw on the side of the neck. 



Paratoid glands of toads are elevated glandular bodies at the sides 



of the back part of the head. 

 Pectoral arch. — The bones that support the fore limbs, as the clavicle, 



coracoid and scapula. 

 Pedicillate. — With a stem, stalk, or foot, like a mushroom. 

 Penultimate. — Next to the last. 

 Pineal eye. — A minute whitish, transluscent spot showing through the 



interparietal or occipital plates on the head of some lizards. 

 Plantar tubercles. — Tubercles on the soles of the feet. 

 Plastron. — The lower portion of the shell of a turtle. 

 Pleurodont. — With the teeth grown fast to the inner side of the bone 



of the jaw. 

 Plicae. — Folds or grooves. 



Prefrontals. — In front of the frontal in serpents. 

 Premaxillary. — The bones forming the anterior border of the upper 



jaw, meeting in median line. 

 Procoelous. — Said of vertebrae which have the anterior end concave, 



the posterior convex. 

 Proximal. — Nearest. 



Pterygoid. — A bone of the roof of the mouth lying on each side imme- 

 diately behind the palatine. 

 Quadrate. — The bone on each side of which the lower jaw of batrachians 



and reptiles is swung. 

 Rostral. — The epidermal plate covering the snout of snakes and lizards. 

 Rugosities. — Roughnesses or wrinkles. 

 Scuta. — A large epidermal scale. 

 Semipalmate. — Toes half-webbed. 



Septum. — A dividing wall, as that between the nasal passages. 

 Serrated. — With saw-tooth projections. 

 Sessile. — Attached without any stalk or foot. 



