370 GLOSSARY. 



As'ter-oid (Gr. aster ^ a. star; und eidos, form). Star-shaped, or possessing 



radiatii\tr lobes or rays like a star-tish. 

 As-te-roid'e-a. An order of Echinodermata^ comprising' the Star-fislies, 



characterized by their rayed form. 

 A-stom'a-tous (Gr. a, without ; stoma^ mouth). Not possessing a mouth. 

 At'las (Gr. the god who holds up the heavens). The ttrot vertebra of the neck, 



which articulates with and supports the slvuU. 

 A'tri-um (Lat, for a hull). AppUed to the great chamber or " cloa'ca," into 



which the intestine opens in the Tunicata. 

 Au-rel'la (Lat. a^/rw/n., i^okl). Applied to the chrysalides of some Lepidop- 



tera^ on account of their exhibiting a golden lustre. 

 Au'ri-cle (Lat. dim. of auris, ear). Applied to one of the cavities of the 



heart, by which blood is driven into the ventricle. 

 Au-toph'a-gi (Gr. autos, self; phmjo, I eat). Applied to Vnrds whose young 



c.in run about and obtain food for themselves as soon as they escape trom 



the egg. 

 A'vES (Lat. avis, a bird). The class of the Birds. 

 Av-i-ou-la'hi-um (Lat. ai'icula^ dim. of a;u's, abird"). A singular appendage, 



often shaped like the head of a bird, found in many of the Folyzoa. 

 Axis (Gr. axo/i, a pivot). The seconJ vertebra of tile neek, upon v/hich the 



Hkull and atlas usually rotate. 

 Az'r-G03 (Gr. a, without; zugon, yoke). Single ; without a fellow. 



Bag-te'ri-um (Gr. haHerion^ a stafi'). A kind of staff-shaped filament which 

 appears in organic infusions after they hiive been exytoycd to tiie air. 



Bal'an-cers. 



Ba-lan'i-d^ (Gr. haIanof>. an acorn"). A family of sessile Chriptides^ com- 

 monly called *■' Acorn-slaells." 



Ba-leen' (Lat. bihjina., a whale"!. The horny plates which occupy the palate 

 of the true or " whale-bone" Whales. 



Bat'i-des (Gr. /;fl^w, a bramble). The family of the Ela-^mohmncldi, com- 

 prising the Kays. 



Ba-tra'cui-a (Gr. batracJios, a frog). Often loosely applied to any of the 

 Amphihla^ but sometimes restricted to tlie Amphibians as a class, or to the 

 single order of the An-oura. 



Bi'fid (Lat. his. twice; Jindo, I cleave). Cleft into two parts ; forked. 



Bi-lat'er-al (Lat. his, twice ; latus, a side). ILiving two symmetrical sides. 



Bi-maVa (Lat. his, twice ; manus, a hand). The order of Maminalia compris- 

 ing Man alone. 



Bip'e-dal (Lat. hls^ twice ; pes, foot). Walking upon two legs. 



Bi-ra'mous (Lat. his, twice; ramus, a branch). Applied to a limb which is 

 divided into two branches (e. g., the limbs of Cirripedes). 



Bi' VALVE (Lat. his^ twice ; valves, folding-doors). Composed of two plates or 

 valves; applied to the shell of the Laindlihrancliiata and Bracldopoda, and 

 of the carapace of certain Crustacea. 



Blas-toid'e-a (Gr. hlastos, a bud ; and eidos, form). An extinct order of EcJii- 

 ■iiodermata, often called Pentremites. 



Brach-i-op'o-ua (Gr. hrachion, an arm ; pons, tlie foot). A class of the Mol- 

 lascoida, often called "Lamp-shells," characterized by possessing two 

 flesliy arms continued from the sides of the mouth. 



Bra'chi-um (Gr. hrackion, arm). Applied to the upper arm of Verte- 

 brates. 



Braci-i-y-u'r.v (Gr. brarhus, short; oura, tail). A tribe of the Decapod Crus- 

 ticeans with short tails (/. ^., the Crabs). 



Bracts. {See Hydrophyllia.) 



Brad-y-pod'i-d.e (Gr. hradus, alow ; podes, feet). The family of Edentata 

 comprising the Sloths. 



Branch'i-a (Gr. hragchia, the gills of fishes). A respiratory jrgan adapted to 

 breathe air dissolved in watc'r. 



Branch'i-ate. Possessing gills orbranchi;e. 



BitAX-uHiF'i£-RA (Gr. hvagcJiia^ gills; and pkero, I carry). A division of Qa»- 



