K I L 



[243] 



K Y A 



is an intermediate substance be- 

 tween mica- slate and clay-slate. 

 Dean Conybeare states that the com- 

 mon Ullas has been at last admitted 

 on all hands to be a genuine clay- 

 slate. Dr. Boase proposes to apply 

 to the Jcillas the name of Cornubia- 

 nite. See Cornubianite. Kir wan 

 gives the following analysis of 

 killas : 100 grains contained silica 

 60, alumina 25, magnesia 9, iron 6. 



KI'LLINITE. A mineral of a pale green 

 colour, occuring in veins of granite 

 at Killiney, near Dublin. 



KI'HMERIDGE CLAY. A blue and grey- 

 ish-yellow slaty clay of the upper 

 oolite formation ; a member of the 

 oolite group, thus called from its 

 being found abundantly at Kim- 

 raeridge, in the Isle of Purbeck. 

 It contains gypsum and bituminous 

 shale. It is a marine deposit. 

 Kiinmeridge clay forms the base of 

 the Isle of Portland. The bitumin- 

 ous shale found in the Kimmeridge 

 clay on the coast of the Isle of 

 Purbeck, has obtained the name of 

 Kimmeridge coal, and is used as 

 fuel. The most interesting remains 

 contained in the Kimmeridge clay 

 are those of the extinct genera 

 allied to the order Lacerta, 

 evidently calculated for a marine 

 abode; the vertebrae, paddles, &c., 

 of a species of Ichthyosaurus diff- 

 ering from those in the lias; the 

 vertebrae, phalanges, and head of 

 another saurian, perhaps a variety 

 of plesiosaurus, have been found at 

 Kimmeridge and Headington ; 

 bones, apparently of cetacea, like- 

 wise appear. 



KING-CRAB, (an entomostracan, or 

 shelled insect.) The Limnlus 

 polyphemus, known also as the 

 horse-shoe. It is very common on 

 the coast of New Jersey. The 

 king-crab is placed by Cuvier 

 amongst the pcecilopods. 



KNOB, (knolel, hnopf, Germ.) A 

 hard protuberance. In conchology, 

 any part of a shell bluntly rising 

 above the rest. 



KOA'LA. An extraordinary quadruped 

 inhabiting the continent of Austra- 

 lia. Cuvier placed the koala in 

 marsupialia, or the fourth order of 

 Mammalia. This animal has a 

 short stout body, short legs, and 

 no tail : it has the five toes, or 

 ringers, of the fore-feet divided 

 into two groups, the thumb and 

 index forming one group, and the 

 three remaining toes or fingers the 

 other. On the hind-feet the thumb 

 is altogether wanting. Carrying 

 its young for a long period on its 

 back, this separation of the toes 

 of the fore-feet enables it to take 

 firmer hold of the branches of the 

 trees, on which it passes a portion 

 of its time. 



KOTH. A name given by the Spaniards 

 to an earthy slimy substance ejected 

 from the volcanoes of South Amer- 

 ica. It is of a blackish brown col- 

 our, an earthy texture, and is but 

 slightly coherent. The natives call 

 it Moya. 



KOT/PHOLITH. (from /cov0a<?, light, 

 and X/009, a stone, Gr.) The preh- 

 nite koupholite of Brongniart: 

 prehnite lamelliforme rhomboidal, 

 of Haiiy; a variety of prehnite. It 

 occurs in minute, rhomboidal plates, 

 is of a greenish or pale yellow 

 colour, glistening, and slightly 

 pearly. It has been found in the 

 Pyrenees. 



KT^ANITE. (from icvavos, blue colour, 

 Gr. This is frequently written 

 Cyanite.) The Cyanit of Werner; 

 the Disthene of Haiiy, and the 

 Sappare of Kirwan. Kyanite oc- 

 curs both massive and crystallized, 

 the crystals, often very long, are 

 frequently grouped. Its colour, as 

 its name imports, is blue, varying 

 from an intense to a light sky-blue. 

 It is infusible, except under the 

 compound blow-pipe. It consists 

 of alumina 64, silica 34, with a 

 small quantity of oxide of iron and 

 a trace of lime. It is found in the 

 primary rocks in Scotland and in 

 America. 



