258 Trans. Acad. Sci. of St. Louis. 



Crown shields.— The large plates which cover the upper surface of 



snakes' heads. 

 Dentaries. — The anterior bone of the lower jaw, the one usually bearing 



the teeth. 

 Dermal folds. — The thickened ridges of skin on the back of some frogs; 



the glandular folds. 

 Diapophysis. — The transverse process of a vertebra; here used of that' 



of the sacral vertebra. 

 Digits. — Fingers and toes. 

 Distal. — Remote from point of attachment. 

 Entoplastron. — One of the bones of the plastron of a turtle. 

 Emarginate. — Furnished with an obtuse notch. 

 Epicoracoid. — The portion of the coracoid bone or cartilage lying in 



front of and more or less separated from the rest by a fontanelle. 

 Femoral. — Pertaining to the thigb. Femoral pores are found on the 



under side of the thighs of some lizards. 

 Fontanelle. — A space filled with membrane between bones that approach 



one another without meeting. 

 Fossa. — A depression or excavation more or less cup-shaped. 

 Frontals. — Plates of the top of the head of a snake. 

 Gastrosteges. — Transverse band-like plates on abdomen of snakes. 



Ventrals. 

 Gular. — Pertaining to the throat; gular-fold, a fold of skin across the 



throat. 

 Holders. — Organs of adhesion at the corners of the mouth of a tadpole. 

 Humerals. — Scutes of the plastron of a turtle. 

 Hypapophysis. — A process from the median line of the under surface 



of the bodies of the vertebra. 

 Imbricate. — Overlapping like shingles. 



Inframarginals. — Scutes of some tortoises lying above the marginals. 

 Inguinal. — Pertaining to the groin. 

 Internasals. — Plates on top of snout, behind the rostral and between 



the nasals in serpents. 

 Isodont. — Equal toothed. 



Keel. — A ridge. Keeled, furnished with a sharp ridge. 

 Labials. — Plates that border the mouth, except the rostral. In serpents. 

 Larva. — The undeveloped young of some animals, as the tadpole of 



frogs. 

 Loral.— Pertaining to the space in front of the eye. See anteorbital. 



Serpents. 

 Mandible. — The lower jaw. 



Marginals. — The plates around the carapace. Turtles. 

 Maxillary bones. — Those bones of the upper jaw lying behind the pre- 



maxillary of each side usually bearing the outermost row of teeth. 

 Metacarpals. — The long bones in the hand separating the carpals from 



the phalanges. 

 Metatarsals. — Bones in the foot separating the tarsals from the 



phalanges. 



