622 GLOSSARY. 



Al-lah-toid'e-a. The group of Verte'jrata in which the fcetua is fumiahed 

 with an allantois, comprising the Eeptiles, Birds, and Mammals, 



Al-lan-tois' (Gr. alias, a sausage). One of the "membranes" of the foetus 

 in certain Vertebrates. 



Al-ve'o-li (Lat. dim. o{ alvus, belly). Applied to the sockets of the teeth. 



Am-bu-la'cba (Lat. ambulacrum, a place for walking). The perforated spaces 

 or "avenues" through which are protruded the tabe-feet, by means of 

 which locomotion is effected in the Echinodermata. 



Am'eit-la-to-by (Lat. ambulo, I walk). Formed for walking. Applied to a 

 single limb, or to an entire animal. 



A-met-a-bol'io (Gr. o, without ; metabole, change). Applied to those insects 

 which do not possess wings when perfect, and which do not, therefore, pass 

 through any marked metamorphosis. 



Am'hi-on (Gr. amnos, a lamb). One of the foetal membranes of the higher 

 Vertebrates. 



Am-hi-o'ta. The group of Vertebrata in which the foetus is furnished with 

 an amnion, comprising the Eeptiles, Birds, and Mammals. 



A-M(e'ba (Gr. amoibos, changing). A species of Ehizopod, so called from the 

 numerous changes of form wmch it undergoes. 



A-si(e'bi-eorm. Eesembling an Amceha in form. 



A-moe-pho-zo'a (Gr. a, without ; m^yrphe, shape ; zoorii, animal). A name some- 

 times used to designate the Srponges. 



A-moe'phous. 



Am-phtb'i-a (Gr. ampM, both ; bios, life). The Frogs, Newts, and the like, 

 which have gills when young, but can always breathe air directly when adult. 



AM-PHi-offi'ions (Gr. amipM, at both ends ; koilos, hollow). Applied to ver- 

 tebra which are concave at both ends. 



Am'phi-disos (Gr. ampM, at both ends ; diskos, a quoit, or round plate). The 

 spioula which surround the gemmules of Spongilla, and resemble two 

 toothed wheels united by an aSe. 



Am-phi-ox'tis (Gr. amphi, at both ends ; oxus, sharp). The Lanoelet, a little 

 fish, which alone constitutes the order PharyngoorancTiU. 



Am-phi-pneus'ta (Gr. amphi^ both : pneo, I breathe). Applied to the " pe- 

 rennibranchiate " Amphibians which retain their gills through life. 



Am-phip'o-da (Gr. amphi; audi perns, a foot). An order of Crustacea. 



A'hal (Lat. anus, the vent). Connected with the anus, or situated near the 

 anus. 



Aif-AL-tAN-ToiD'E-A. The group of Vertebrata in which the embryo is not 

 furnished with an allantois. 



A-nal'o-gous. Applied to parts which perfonn the same function. 



An-am-ki-o'ta. The group of Vertebrata in which the embryo is destitute of 

 an 'amnion. 



An-aeth-kop'o-da (Gr. a, without ; arthros, a joint ; pous, foot). That divi- 

 sion of Annulose animals in which there are no articulated appendages. 



Akch-y-lo'sis or Ank-y-lo'sis (Gr. anhulos, crooked). The union of two 

 bones by osseous matter, so that they become one bone, or are immovably 

 joined together. 



An-deog'y-nods (Gr. aiiir, a man ; gu/ne, a wouian). Synonymous with her- 

 maphrodite, and implying that the two sexes are united in the same indi- 

 vidual. 



An'dro-phoeeb (Gr. auer, a man ; andpliero, I carry). Applied to medusiform 

 gonophores of the Byd/rozoa, which carry the spei'matozoa, and differ in 

 form from those in which the ova are developed. 



An-hel'i-da (a Gallicised form of Annulata). The Einged Worms, which 

 form one of the divisions of the Anarthropoda, 



An'nu-xa-ted. Composed of a succession of rings. 



Au-nu-loi'da (Lat. annuhis, a ring; Gr. eidos, fonn). The sub-kingdom 

 comprising tne Echmodermata and the Scoledda (= Echinozoa). 



Ah-nd-lo'sa (Lat. annulus). The sub-kingdom comprising the Anarikropoda 

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

 evidently composed of a snoceBsion of rings. 



