ANT 



[27 ] 



ANT 



described by Rose. Its specific 

 gravity is 76'3. Its constituent 

 parts are silica 44*49, alumina 

 34-4, lime 15-68, magnesia 5-3, 

 oxide of iron, under 1. 



Anorthite is found at Monte 

 Somma, the ancient crater of 

 Vesuvius. Monticelli described 

 it at the same time with Rose, 

 under the name of Christianite, 

 after Prince Christian of Denmark. 



ANOETHI'TIC MELANE-OBE. A species 

 of melane-ore, called also Allan ite, 

 which see. 



ANTA'GONISM. Opposition of action. 



ANTAGONIST, (antagonista, Lat. anta- 

 goniste, Fr. antagonista, It.) A term 

 applied to such muscles as oppose, 

 or counteract, others. 



ANTA'BCTIC. (from avrl, against, and 

 a/9/cTos, the bear, or northern con- 

 stellation. 



1. The southern pole, so called as 

 opposite to the northern. 



2. One of the lesser circles, drawn 

 on the globe, at the distance of 

 twenty-three degrees and a half 

 from the antarctic, or south pole. 



ANTE'CIAN. (from aWot/co?, Gr. living 

 opposite.) Those who live under 

 the same meridian east or west, but 

 under opposite parallels of latitude 

 north and south. The word is also 

 written Antoecian. 



ANTEDILU'VIAL. | (from ante, before, 

 ANTEDILU'VIAN. ) and diluvium, a 

 deluge.) 



1 . Existing before the deluge. 



2. Relating to things existing be- 

 fore the deluge. 



ANTEDILU'VIAN. One that lived 

 before the deluge. 



ANTEMTJ'NDANE. (from ante, before, 

 and mundus, the world.) That 

 existed before the creation of the 

 world. 



ANTE'NNJE. (antenna, Lat. antennes, 

 Fr. This word appears by all 

 lexicographers to be given in the 

 plural only.) Those delicate move- 

 able horns with which the anterior 

 part of the heads of insects are 



furnished. These are peculiar to 

 this order of beings, and are easily 

 distinguished from the tentaculse 

 of vermes, in being crustaceous ; 

 and from the palpi of insects, by 

 their situation being nearer the 

 mouth. The antenna rarely ex- 

 ceed two in number, though in 

 some insects of the apterous kind 

 they amount to four, or even six. 

 Of the uses of the antennae we are 

 still ignorant. 



The antennae are jointed organs, 

 placed one on either side of the 

 head between the angle of the 

 mouth and the eyes ; the variations 

 in their structure are very great. 

 Those which consist of equal joints 

 are called equal ; those whose joints 

 are dissimilar are called unequal. 

 The inequality of antennae proceeds 

 chiefly from the differing form of 

 their second and last joint. Antennae 

 which consist of but one joint are 

 called exarticulate ; those with two 

 joints, biarticulate ; with three, 

 triarticulate ; while those whose 

 joints are numerous are called mul- 

 tiarticulate. The great majority of 

 antennae are completely naked ; 

 others have a clothing consisting of 

 shorter or longer hair. 



ANTE'BIOB. In conchology, the an- 

 terior of bivalves is the side opposite 

 to the hinge ; of a spiral univalve, 

 that part of the aperture most 

 distant from its apex ; of a sym- 

 metrical conical univalve, that part 

 where the head of its inhabitant 

 lies. 



A'NTHER. (antkera, Lat. avOrjpa, Gr.) 

 That part of the flower which con- 

 tains the fertilizing dust, pollen, or 

 farina, which, when mature, it 

 scatters. The anther forms the 

 essential part of the stamen. An- 

 thers differ greatly as regards their 

 figure, number, and situation. The 

 most common form of the anther is 

 that of a grain of corn, only smaller; 

 it has a crease, or line, down it, as 

 the grain has, at which it opens 



