322 GLOSSARY. 



AL-LAN-TOID'E-A. The group of Vertebrata in which the foetus is furnished 

 with an allantois, comprising the Reptiles, 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. ot'alvus, belly"). Applied to the sockets of the teeth. 



AM-BU-LA'CRA (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 EcMnoderrnata. 



AM'BU-LA-TO-BY (Lat. ambulo, I walk). Formed for walking. Applied to a 

 single limb, or to an entire animal. 



A-MET-A-BOL'IC (Gr. a, without ; tnetabole, change). Applied to those insects 

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

 through any marked metamorphosis. 



AM'NI-ON (Gr. amnos, a lamb). One of the foetal membranes of the higher 

 Vertebrates. 



AM-NI-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 Rhizopod, so called from the 

 numerous changes of form which it undergoes. 



A-MOE'BI-FORM. Resembling an Amoeba in form. 



A-MOR-PHO-ZO'A (Gr. a, without ; morphe, shape ; zoi'n, animal). A name some- 

 times used to designate the Sponges. 



A-MOR'PHOUS. 



AM-PHIB'I-A (Gr. amphi, both ; bios, life). The Frogs, Newts, and the like, 

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



AM-PHI-COS'LOUS (Gr. ampM, at both ends; icoilos, hollow). Applied to ver- 

 tebrae which are concave at both ends. 



AM'PHI-DISCS (Gr. ampki, at both ends ; diskos, 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 ; oxus, sharp). The Lancelet, a little 

 fish, which alone constitutes the order PharyngoorancMi. 



AM-PHI-PNEUS'TA (Gr. ampM^ both : pneo, I breathe). Applied to the " pe- 

 rennibranchiate " Amphibians which retain their gills through life. 



AM-PHIP'O-DA (Gr. ampM ; and pous, a foot). An order of Crustacea. 



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

 anus. 



AN-AL-LAN-TOID'E-A. The group of Vertebrata in which the embryo is not 

 furnished with an allantois. 



A-NAL'O-POUS. Applied to parts which perform the same function. 



AN-AM-NI-O'TA. The group of Vertebrata in which the embryo is destitute of 

 an amnion. 



AN-ARTH-ROP'O-DA (Gr. a, without ; arthros, a joint ; pous, foot). That divi- 

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



ANCH-Y-LO'SIS or ANK-Y-LO'SIS (Gr. ankulos, crooked). The union of two 

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

 joined together. 



AN-DROG'Y-KOUS (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'DRO-PHORES (Gr. aner, a man ; and phero, 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 Ringed Worms, which 

 form one of the divisions of the Anarthropoaa. 



AN'NU-LA-TED. Composed of a succession of rings. 



AN-NF-LOI'DA (Lat. annulus, a ring; Gr. eidos, form). The sub-kingdom 

 comprising the EcMnoderrnata and the Scoleeida (= JEcMnozoa). 



AN-NU-LO'SA (Lat. annulus). The sub-kingdom comprising the AnartTiropoda 

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

 evidently composed of a succession of rings. 



