H 



[24] 



A K I 



Is but one general orifice to the 

 alimentary cavities, the several 

 stomachs opening into the buccal- 

 orifice. 



ANEN'TEEOTJS. 



An anenterous monad with a single 

 cavity presents the simplest form 

 of the digestive apparatus known 

 among animals. 



ANGIOSPE'EMIA. (from a^ciov, a 

 receptacle, and ffTrep/aa, seed, Gr.) 

 In the artificial system of Linna3us, 

 an order of plants of the class 

 Didynamia. In a more recent 

 arrangement, the order Apetalee is 

 sub-divided into two sub-orders, 

 the Gymnosperms and the Angios- 

 perms; of the Angiosperms, the 

 nettle, spurge, oak, elm, &c., are 

 examples. In the first order, or 

 those having naked seeds, the plants 

 are mostly wholesome and aromatic 

 In the second, where the seeds are 

 enclosed in a seed-vessel, we find 

 the Digitalis, and other poisonous 

 plants. 



ANGIOSPE'EMOTTS. (angiosperme, Pr.) 

 Belonging to the order Angios- 

 permia; having the seeds enclosed 

 in a seed-vessel. 



ANGIO'STOMA. "j A family of univalve 



ANGYO'STOMA. } shells, in the order 

 of Siphonobranchiata. It includes 

 many genera, as the Conus, Cypra3a, 

 Terebellum, &c. 



ANGUI'LLIFOEM. (from anguilla, an 

 eel, and forma, Lat.) A term 

 given to fishes having the form of 

 an eel. 



A NGUL'ITHES . A genus of multicocular 

 shells, possessing many of the char- 

 acters of nautilus, the mouth being 

 of a triangular form. 



ANGTJ'STATE. (angustatus,~Lo.i.'] Begin- 

 ning with a narrow base, which 

 base then dilates and thickens. 



A^HT'DEITE. (A substance so named 

 in consequence of no water enter- 

 ing into its composition.) The 

 Count de Bournon has proposed to 

 substitute the term Bardiglione for 

 Anhydrite. It is a combination of 



lime and sulphuric acid, in the 

 proportion, according to Vauqeulin, 

 of 0-40 lime, and 0.60 sulphuric 

 acid. It has obtained various 

 names, as Chaux Sulfatee Anhydre, 

 by Haiiy ; Chaux Sulfatine by 

 Brongniart ; Anhydrite by Werner; 

 Muriacite by Poda and Klaproth ; 

 Pierre de Vulpino by Fleurian, and 

 Marno Bardiglio di Berganio by 

 the Italian statuaries. Anhydrous 

 gypsum. A variety of sulphate of 

 lime, called anhydrous gypsum, or 

 anhydrite, in consequence of its 

 being quite free from water. It is 

 harder than selenite, and sometimes 

 contains chloride of sodium, when 

 it is called muriacite. Its colours 

 are white, blue, red, and grey. It 

 occurs both massive and crystallised,. 

 Lustre alternates from splendent to 

 glistening, and is pearly. Fracture 

 splintery and conchoidal. Specific 

 gravity 2*85. There are six 

 varieties of this mineral. 



ANHY'DEOTJS. (from a priv. and vdwp, 

 water.) Without water in its com- 

 position ; containing no water. 



ANIMA'LCULE. (animalculum, Lat. ani- 

 malcule, JY. animaletto, It.) An 

 exceedingly small animal, scarcely 

 discoverable by unaided vision, but 

 which, by the help of the micros- 

 cope, is found both in solids and 

 fluids. The simplest gelatinous 

 animalcules, which possess no in- 

 ternal cavity, are reduced to super- 

 absorption, and thus form a transi- 

 tion to the mode of nourishment of 

 the vegetable kingdom. Professor 

 Grant. 



A'NKEEITE. Paratomous limestone, a 

 species of limestone thus named 

 after Prof. Anker. It is found in 

 the mines of Styria. 



A'NIMAL KINGDOM. The animal king- 

 dom comprehends beings the most 

 diversified as to form, structure, 

 and the media in which they live. 

 The great naturalist Cuvier ar- 

 ranged the animal kingdom under 

 four great divisions, or sub-king- 



