USED IN NATURAL HISTORY. 



81 



tiihemi, I place. A theory, or sup- 

 position. A rational conjecture. 



HYPO'THETICAL. Of the nature of 

 hypothesis. 



HYPOZO'IC SYSTEM. fr. gr. zoon, an 

 animal. A geological term ap- 

 plied to those rocks of crystalline 

 slates which occur especially in 

 the central ridges of mountain 

 chains. They contain no organic 

 remains. 



HYPSIPRYM'NUS. fr. gr. ipsi, high; 

 prumnos, behind, extreme. The 

 Potoroo. 



HY'RAX.-- fr.gr. urax, a shrew mouse. 

 A genus of mammals. 



HYSTERA'JTTHOUS. fr. gr. usteron, 

 afterwards; anthos, a flower. Ap- 

 plied to those plants in which the 

 leaves appear after the flowers. 



HYSTIU x. fr. gr. ustrix, formed from 

 tts, a hog; thrix, a bristle. The 

 porcupine. 



IA'NTHIJCA. See Janthina. 



IA'NTHIS-^. Oceanic shells. 



I'BEX. Lat. A wild goat. A ge- 

 nus of mammals. 



I'BIS. A genus of birds. 



ICEBERG. A floating mountain of ice. 



ICED. In botany; covered with par- 

 ticles like icicles. 



ICE DROPS. In botany; transparent 

 processes resembling icicles. 



ICHNEUMON^ .fr. gr. ichneuo, I pur- 

 sue, I follow in the track. The 

 Mangouste, or Pharaoh's rat. 



ICHTHYO'COLIA. fr. gT.ichthus, a fish ; 

 holla, glue. Fish glue. A kind 

 of glue prepared from fishes. 



ICIITHYO'LOGIST. fr. gr. ichthus, a 

 fish ; logos, a discourse. One skill- 

 ed in ichthyology. 



ICHTHYO'LOGY. fr. gr. ichthus, a fish ; 

 logos, a discourse. The natural 

 history of fishes. 



ICHTHYO'SAUBUS. fr. gr. ichthus, a 

 fish; saura, lizard. Fish-lizard. 

 Systematic name of a kind of fos- 

 sil, (p. 57, Book viii). 



IcosAN'jmous.-Having about twenty 

 stamens growing on the calyx. 



IC'TERUS. Lat. Name of a yellow 

 bird, which, if one see, being sick 

 of the yellow jaundice, the perscn 

 recovers, and the bird dies. Sys 

 tematic name of the oriole. 



IDJE'US. Lat. Belonging or relat 

 ing to Mount Ida. 



IGNEOUS HOCKS. Are those rocks 

 whose structure is attributable to 

 the influence of heat, such as 

 granite and basalt. They are 

 distinct from stratified rocks, or 

 those formed by deposits from 

 water. 



I'GUANA. Name of a kind of sau- 

 rian. 



I'GUANIAN. Applied to saurians of 

 which the type is the Iguana. 



I'GUANIDA. From the aboriginal 

 name, iguana, and Gr. eidos, re- 

 semblance. A family of sauri- 

 ans. 



IGUA'NODOX. From iguana, and the 

 Gr. odous, tooth. An extinct ge- 

 nus of gigantic herbivorous rep- 

 tiles, discovered in the south of 

 England. 



IL'IAC. fr. lat. ilia, the flank. Re- 

 lating or belonging to the flank or 

 iliurn. 



ILIA'CUS. Lat. Name of a thrush. 



IL'IUM. The haunch bone. 



ILLY'RICA. Lat. Illyrian ; belong- 

 ing or relating to Illyria. 



IMA'GO. Lat. Image. Name given 

 to. insects after they have com- 

 pleted their metamorphosis. 



IMBEDDED. A mineral found in a 

 mass of another substance is said 

 to be imbedded. 



IMBIBI'TJON. fr. lat. in, in; 6160, I 

 drink. The act of absorbing or 

 soaking in. 



IMBRICA'TA. Lat. Imbricate, tile 

 like. Arranged like tiles. 



IMBIUCATA'RIA. Lat. As if imbri- 

 cated, or tile-like. 



IMB'RICATE. fr. lat. imbrex, a roof- 

 tile. Laid one over the other like 

 tiles or shingles. 



IMPARI-PINNATE. In botany; pin 

 nate with an odd leaf. 



