380 GLOSSARY. 



AMPHILESTES (Gr. amphi, both ; lestes, a thief). A germs of Jurassic Mam- 



mals. 

 AMPHISPONGIA (Gr. amphi, both ; spoygos, sponge). A genus of Silurian 



sponges. 



AMPHISTEGINA (Gr. amphi, both ; siege, roof). A genus of Foraminifera. 

 AMPHITHEBIUM (Gr. amphi, both ; therion, beast). A genus of Jurassic Mam- 

 mals. 

 AMPHITRAGULUS (Gr. amphi, both ; dim. of trar/os, goat). An extinct genus 



related to the living Musk-deer. 



AMPLEXUS (Lat. an embrace). A genus of Rugose Corals. 

 AMPYX (Gr. ampux, a wreath or wheel). A genus of Trilobites. 

 ANARTHROPODA (Gr. a. without ; arthros, a joint ; pous, foot). That division 



of Annulose animals in which there are no articulated appendages. 

 ANCHITHERIOM (Gr. aychi, near ; therion, beast). An extinct genus of Mammals. 

 ANCYLOCERAS (Gr. agkulos, crooked; ceras, horn). A genus of A mnumitidce. 

 ANCYLOTHERIUM (Gr. agkulos, crooked ; therion, beast). An extinct genus of 



Edentate Mammals. 



ANDRIAS (Gr. andrias, image of man). An extinct genus of tailed Amphi- 

 bians. 

 ANGIOSPERMS (Gr. anyeion, a vessel ; sperma, seed). Plants which have their 



seeds enclosed in a seed-vessel. 

 ANNELIDA (a Gallicised form of Annulatd). The Ringed Worms, which form 



one of the divisions of the Anarthropoda. 

 ANNULARIA (Lat. annulus, a ring). A genus of Palaeozoic plants, with leaves 



in whorls. 

 ANNULOSA (Lat. annulus). The sub-kingdom comprising the Anarthropoda 



and the Arthropoda or Articulata, in all of which the body is more or less 



evidently composed of a succession of rings. 

 ANOMODONTIA (Gr. anomos, irregular; odous, tooth). An extinct order of 



Reptiles, often called Dicynodontia. 

 ANOMURA (Gr. anomos, irregular ; oura, tail). A tribe of Decapod Crustacea, 



of which the Hermit-crab is the type. 

 ANOPLOTHERID.E (Gr. anoplos, unarmed ; thcr, beast). A family of Tertiary 



Ungulates. 

 ANOURA (Gr. a, without ; oura, tail). The order of Amphibia comprising the 



Frogs and Toads, in which the adult is destitute of a tail. Often called 



Bairachia. 

 ANTENNA (Lat. antenna, a yard-arm). The jointed horns or feelers possessed 



by the majority of the Articulata. 

 ANTEXNULES (dim. of Antennae). Applied to the smaller pair of antennae in 



the Crustacea. 

 ANTHRACOSAURUS (Gr. anthrax, coal ; saura, lizard). A genus of Labyrintho- 



dont Amphibians. 

 ANTHRAPAL.EMON (Gr. anthrax, coal ; palcemon, a prawn originally a proper 



name). A genus of long-tailed Crustaceans from the Coal-measures. 

 ANTLERS. Properly the branches of the horns of the Deer tribe (Cervidce], but 



generally applied to the entire horns. 

 APIOCRINID.E (Gr. ap'on, a pear; krinon, lily). A family of Crinoids the 



" Pear-encrinites." 

 APTERYX (Gr. a, without ; pterux, a wing). A wingless bird of New Zealand, 



belonging to the order L'ursores. 

 AQUEOUS (Lat. aqua, water). Formed in or by water. 

 ARACHNIDA (Gr. arachne, a spider). A class of the Articulata, comprising 



Spiders, Scorpions, and allied animals. 

 ARBORESCENT. Branched like a tree. 



ARCHJSOCIDARIS (Gr. archaios, ancient ; Lat. cidaris, a diadem). A Palaeo- 

 zoic genus of Sea-urchins, related to the existing Cidaris. 

 ARCHJEOCYATHUS (Gr. archaios, ancient ; kuathos, c\ip). A genus of Palaeozoic 



fossils allied to the Sponges. 

 ARCH^EOPTERYX (Gr. archaios, ancient ; pterux, a wing). The singular fossil 



bird which alone constitutes the order of the Kaururce. 



