322 GLOSSARY 



parts or organs which in simpler forms of life are more 



or less united. 

 Dimorphic. — Having two distinct forms. — Dimorphism is 



the condition of the appearance of the same species 



under two dissimilar forms. 

 DicECious. — Having the organs of the sexes upon distinct 



individuals. 

 DiOKiTE. — A peculiar form of Greenstone. 

 Dorsal. — Of or belonging to the back. 



Edentata. — A peculiar order of Quadrupeds, characterized 

 by the absence of at least the middle incisor (front) teeth 

 in both jaws. {Examples, the Sloths and Armadillos.) 



Elytra. — The hardened fore-wings of Beetles, serving as 

 sheaths for the membranous hind-wings, which consti- 

 tute the true organs of flight. 



Embryo. — The young animal undergoing development 

 within the egg or womb. 



Embryology. — The study of the development of the 

 embryo. 



Endemic. — Peculiar to a given locality. 



Entomostraca. — A division of the class Crustacea, having 

 all the segments of the body usually distinct, gills at- 

 tached to the feet or organs of the mouth, and the feet 

 fringed with fine hairs. They are generally of small 

 size. 



Eocene. — The earliest of the three divisions of the Tertiary 

 epoch of geologists. Rocks of this age contain a small 

 proportion of shells identical with species now living. 



Ephemerous Insects. — Insects allied to the May-fly. 



Fauna. — The totality of the animals naturally inhabiting 

 a certain country or region, or which have lived during a 

 given geological period. 



Felid^. — The Cat family. 



Feral. — Having become wild from a state of cultivation or 

 domestication. 



