380 GLOSSARY. 
a a (Gr. amphi, both; léstés, a thief). A genus of Jurassic Mam- 
mals. 
AMPHISPONGIA (Gr. amphi, both; spoggos, sponge). A genus of Silurian 
sponges. 
AMPHISTEGINA (Gr. amphi, both ; stegé, roof). A genus of Foraminifera. 
ce Spence (Gr. amphi, both; thérion, beast). A genus of Jurassic Mam- 
mals. 
AMPHITRAGULUS (Gr. amphi, both ; dim. of tragos, goat). An extinct genus 
related to the living Musk-deer. 
AMPLEXUS (Lat. an embrace). A genus of Rugose Corals. 
AMPyYx (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. 
ANCHITHERIUM (Gr. agchi, near ; thérion, beast). An extinct genus of Mammals, 
ANCYLOCERAS (Gr. agkulos, crooked ; ceras, horn). A genus of Ammonitide. 
ANCYLOTHERIUM (Gr. agkulos, crooked ; thérion, beast). Anextinct genus of 
Edentate Mammals. 
ANDRIAS (Gr. andrias, image of man). An extinct genus of tailed Amphi- 
bians. 
ANGIOSPERMS (Gr. angeion, a vessel; sperma, seed). Plants which have their 
seeds enclosed in a seed-vessel. 
ANNELIDA (a Gallicised form of Annulata). The Ringed Worms, which form 
one of the divisions of the Anarthropoda. 
ANNULARIA (Lat. annulus, a ring). A genus of Paleozoic 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. anoimos, irregular ; owra, tail). A tribe of Decapod Crustacea, 
of which the Hermit-crab is the type. 
ANOPLOTHERIDE (Gr. anoplos, unarmed ; ther, beast). A family of Tertiary 
Ungulates, 
Anoura (Gr. a, without; owra, tail). The order of Amphibia comprising the 
Frogs and Toads, in which the adult is destitute of a tail. Often called 
Batrachia. 
ANTENN& (Lat. antenna, a yard-arm). The jointed horns or feelers possessed 
by the majority of the Articulata. 
ANTENNULES (dim, of Antenne). Applied to the smaller pair of antenne in 
the Crustacea. 
ANTHRACOSAURUS (Gr. anthrax, coal; saura, lizard). A genus of Labyrintho- 
dont Amphibians. 
ANTHRAPALEMON (Gr. anthrax, coal; palemén, 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 (Cervide), but 
generally applied to the entire horns. 
APIOCRINIDH (Gr. apion, a pear; krinon, lily). A family of Crinoids—the 
“* Pear-encrinites.” 
APTERYX (Gr. a, without; pteruz, a wing). A wingless bird of New Zealand, 
belonging to the order Cursores, 
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. 
ARCHAEOCIDARIS (Gr. archaios, ancient; Lat. cidavis, a diadem). A Palxo- 
zoic genus of Sea-urchins, related to the existing Cidaris. 
ARCH&OCYATHUS (Gr. archaios, ancient ; kuathos, cup). A genus of Palzozoic 
fossils allied to the Sponges. 
ARCHOPTERYX (Gr. archaios, ancient; pteruz, a wing). The singular fossil 
bird which alone constitutes the order of the Saurure. 
