322 GLOSSARY. 



Al-lan-toid'e-a. The group of Vertehrata in -which the fcetus is ftmished 

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



Al-lah-tois' (Gr. allae, a sausage). One or the "membranes" of the foetus 

 in certain Vertebrates. 



Al-vh'o-li (Lat. dim. ofalvm, belly). Applied to the sockets of the teeth. 



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

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

 which locomotion is effected in the EcMnodermata. 



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

 single limb, or to an entire animal. ., 



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

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

 through any marked metamorphosis. 



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

 Vertebrates. 



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

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



A-m<e'ba (Gr. amoiios, changing). A species of Ehizopod, so called from the 

 numerous changes of form which it undergoes. 



A-M(e'bi-form. Eesembling an Amoeba in form. 



A-moe-pho-zo'a (Gr. a, without ; morphi, shape ; zoZn, animal). A name some- 

 times used to designate the Sponges. 



A-mok'phod3. 



Am-phie'i-a (Gr. ampTii, both ; Jjos, life). The Frogs, Newts, and the like, 

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



Am-phi-oce'lotjs (Gr. ampM, at both ends ; koilos, hollow). Applied to ver- 

 tebrae which are concave at both ends. 



Am'phi-disos (Gr. am/phi, at both ends ; dish>s, a quoit, or round plate). The 

 spicula which surround the gemmules of Spongilla, and resemble two 

 toothed wheels united by an axle. 



Am-phi-ox'us (Gr. ampM, at both ends ; oxvs, sharp). The Lancelet, a little 

 fish, which alone constitutes the order PharyTigoorancMi. 



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

 rennibranohiate " Amphibians which retain their gills through life. 



Am-phip'o-da (Gr. amphi ; and poua, a foot). An order of Crukacea. 



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

 anus. 



An-al-ian-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 perform the same function. 



An-am-ni-o'ta. The group of Fertebrata ia which the embryo is destitute o£ 

 an amnion. 



An-aeth-eop'o-ba (Gr. a, without ; arthros, a joint; poiis, foot). That divi- 

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



Anoh-y-io'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. 



As-deoo'y-nous (Gr. aner, a man ; gune, a woman). Synonymous with her- 

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

 vidual. . 



AN'nBO-PHOEES (Gr. aiier, a man ; and pfero, I carry). Applied to medusiform 

 gonophores of the Hydrozoa, which carry the spermatozoa, and differ in 

 form from those in which the ova are developed. 



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

 form one of the divisions of the Anartliropoda. 



AnVu-la-^ed. Composed of a succession of rings. 



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

 comprising tne Eckmodet'Tnata and the Scolecida (= Echinozoa'), 



An-nd-lo'sa (Lat. amrnlus). 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. 



