ASA 



[37] 



A S B 



ARTICTTLA'TA. The first division of 

 the sub-kingdom Annulosa, com- 

 prising four classes, namely; ID- 

 secta, Myriapoda, Arachnida, and 

 Crustacea. 



AETI'CFLATED. Jointed; having joints; 

 united by joints. In botany, the 

 term articulated is applied to leaves, 

 when one leaflet, or pair of leaflets, 

 grow out of the summit of another, 

 with a sort of joint; to stems divided 

 by joints or knots, or divided from 

 space to space by contractions : to 

 culm with joints. 



ARTI'CTJLATING. Fitting by means of 

 joints. 



AETICULA'TION. (articulatio, Lat. 

 articulation, Fr. articolamone, It.) 

 The juncture or joint of bones. 

 There are three kinds of articulation, 



1. Immoveable, called Synarthrosis; 



2. Moveable, or Diarthrosis; 3. 

 Mixed, or Amphi-arthrosis. 



ABTIODA'CTYLA. The fourth order of 

 the class -mammalia, and so named 

 from having an even number of 

 toes, two or four. This order 

 comprizes ron-ruminantia, as the 

 hippopotamus and pig; andrumin- 

 antia, as the camel, stag, sheep and 

 cow. 



AHTICTJLO'SA. See Articulata. 



ARVI'COLA AGRESTIS. The field vole. 

 A species of fossil rodentia, dis- 

 covered in the caves at Torquay 

 and Kirkdale. 



ARVI' COLA AMPHIBIA. Thewatervole. 



ABVI'COLA PKATENSIS. The bank vole. 

 Two species of fossil rodents, found 

 in Kent's hole. 



AETTNDINA'CEOUS. (Lat.) Resembling 

 reeds. 



ASUNDI'NEOTJS. | (arundinem, Latin.) 



AKU'NDINOSE. ) Reedy; abounding 

 in reads. 



ARYTJE'KOID. (from dpvraiva, a ewer, 

 and e^o5, resemblance, Gr.) A 

 name given to some of the cartil- 

 ages, glands, and muscles of the 

 larynx. 



A'SAPHUS. (affcKpfc, Gr. obscurus.) 

 A genus of Trilobites, thus named 



by Brongniart. Professor Buckland 

 observes, in writing of Trilobites, 

 "Fossils of this family were long 

 confounded with insects, under the 

 name of Entomolithus paradoxus; 

 after many disputes respecting 

 their true nature, their place has 

 now been fixed in a separate section 

 of the class Crustaceans, and al- 

 though the entire family appears to 

 have been annihilated at so early a 

 period as the termination of the 

 carboniferous strata, they neverthe - 

 less present analogies of structure, 

 which places them in near approxi- 

 mation to the inhabitants of the 

 existing seas. 



The generic characters of asaphus 

 are thus described by Brongniart. 

 " Corps large et assez plat ; lobe 

 moyen, saillant et tres distinct. 

 Flancs ou lobes lateraux ayant 

 chacun le double de la largeur du 

 lobe moyen. Expansions submem- 

 braneuses depassant les arcs des 

 lobes lateraux. Bouclier demi-cir- 

 culaire, portant deux tubercules 

 oculiformes reticules ? Abdomen 

 divise* en huit ou douze articles." 

 Sir R. Murchison's Silurian system. 

 There are many species ; fourteen 

 are figured in Sir R. Murchison's 

 work. 



In some parts of Wales, that 

 species of Asaphus known as A. 

 Debuchu, is so abundant that the 

 laminaB of the slates are charged 

 with them, so that millions of them 

 have probably lived and died not 

 far distant from those places where 

 we now discover them. 



ASBE'STINE. Incombustible; partak- 

 ing of the properties of asbestos. 



ASBE'STINITE. A species of asbestos. 

 This mineral is amorphous. Texture 

 foliated. Lustre silky, 3. Specific 

 gravity, 1-880. Colour white, with 

 shades of red, yellow, blue, and 

 green. At 150 Wedgewood, it 

 melts into a green glass. 



ASBE'STOID. A mineral, thus called 

 from its resemblance to Asbestos. 



