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over the wings, called halteres, the use of 

 which is not clearly understood : the 

 oestrus, or gad-fly, the musca, or common 

 fly, the culex, or gnat, &c., are exam- 

 ples. 



INSECTI'VORA. (from insect and voro, 

 Lat.) In Cuvier's arrangement, a family 

 of animals which lead a subterraneous 

 life, and having grinders studded with 

 conical points. They live principally on 

 insects, and many of them, in cold cli- 

 mates, pass the winter season in a state 

 of torpidity. The hedgehog and mole 

 are examples. 



INSECTI'VOROUS. (from insectivora.) Ani- 

 mals subsisting wholly, or in part, on in- 

 sects. 



INSPI'SSATED. (from in and spissatus, 

 Lat.) Thickened ; made thick by eva- 

 poration. A term applicable only to 

 fluids whose consistence has been in- 

 creased. 

 INSPISSA'TION. The act of making any 



liquid of a thick consistence. 

 INSTAURA'TION. (instauratio, Lat. in- 

 stauration, Fr. restaurazione, It.) Re- 

 storation to its former condition after 

 decay ; renewal ; reparation. 

 INSTAU'RATOR. He who restores that 

 which is decayed to its former condition. 

 INSTRA'TIFIED. Stratified within some 



other body. 

 I'NSULAR. (insularis, Lat. insulaire, Fr. 



isolano, It.) Belonging to an inland. 

 I'NSULATED. (from insula, Lat.) De- 

 tached from all surrounding objects ; 

 standing by itself ; not contiguous. 

 I'NTEGRAL. (integral, Fr. integrate, It. 

 integer, Lat.) .A portion of a whole, 

 being similar to the whole and not an 

 elementary portion. Thus the smallest 

 portion of carbonate of lime is still car- 

 bonate of lime, but if by any means we 

 separate the carbonic acid from the lime, 

 we no longer have in these, separately, 

 integral portions but the elementary parts. 

 INTE'GUMENT. (integumentum, Lat.) That 

 which covers or envelopes anything ; 

 commonly applied to the natural cover- 

 ings of the body, as the cuticle, corpus 

 mucosum, cutis, &c. 



INTERCO'STAL. (from inter and costa, Lat 

 intercostal, Fr. ) Anything between the 

 ribs, as the intercostal muscles, intercos- 

 tal arteries, nerves, or veins. 

 INTERJA'CENT. (interjacens, Lat.) Lying 



between ; intervening. 

 INTERJE'CTED. (interjectus, Lat.) Thrown 



between other bodies. 

 INTERLA'MINATED. Placed between la- 

 minae of plates ; enclosed by laminae. 

 INTERMEDIATE, (intermediare, and in- 

 termediat, Fr. from inter and medius 

 Lat.) Intervening ; interposed ; betweei 

 the extremes. 



NTERMO'NTANE. (from inter and montfl- 

 nus, Lat.) Placed between mountains ; 

 lying among mountains. 

 NTERMU'NDANE. (from inter and mundus, 

 Lat. ) Subsisting between orb and orb ; 

 relating or belonging to the space between 

 worlds. 



[NTERNO'DAL. (from inter andnodus, Lat.) 

 Applied to flower-stalks proceeding from 

 the intermediate space of a branch be- 

 tween two leaves. 



['NTERNODE. The space between one knot 

 or joint and another ; a term used both 

 in conchology and botany. 

 INTERO'SSEAL. ) (from inter and os, Lat.) 

 INTERO'SSEOUS. $ Placed between bones, 

 as interosseous muscles, arteries, veins, 

 &c. 



INTERRUPTED. Divided ; separated. 

 INTERRU'PTEDLY. In botany, applied to 

 compound leaves when the principal 

 leaflets are divided by intervals of smaller 

 ones ; applied also to spikes of flowers, 

 when the larger spikes are divided by a 

 series of smaller ones. 



INTERSTE'LLAR. (from inter and stella, 

 Lat.) Placed between the stars ; situ- 

 ated amongst the stars ; a term used to 

 express those parts of the universe which 

 are without and beyond our solar system. 

 INTE'RSTICE. (inter stitium, Lat. inter- 

 . stice, Fr. interstizio, It.) The space 

 between one thing and another ; time be- 

 tween one act and another. Neither of 

 the above definitions of Dr. Johnson's 

 can be considered to elucidate the word 

 interstice in its common and usual signi- 

 fication. A small hollow space between 

 the parts of a body ; the space between 

 one part of a body and another. II se dit 

 des petits intervalles que laissent entre 

 eux plusieurs corpuscules contigus ou 

 voisins. 



INTERSTI'TIAL. Containing interstices. 

 INTERSTRA'TIFIED. Stratified between bo- 

 dies of a different character. 

 INTERTRO'PICAL. (from inter and tropical.} 

 Those parts which are situated between 

 the tropics. 



INTESTI'NA. Linnaeus divided the class 

 Vermes, or worms, into five orders, the 

 first of which he named intestina ; these 

 mostly inhabit the bodies of other ani- 

 mals ; they are denominated the most 

 simple animals, being perfectly naked, 

 and without limbs of any kind. Cuvier 

 has divided them into cavitaria, or nema- 

 toidea, and parenchymata. The cavita- 

 ria or nematoidea are worms having ca- 

 vities or stomachs, or an intestinal canal 

 floating in a distinct abdominal cavity, 

 such canal extending from the mouth to 

 the anus. The parenchymata comprises 

 those species in which the body is filled 

 with a cellular substance, or with a con- 



