no 



A GLOSSARY OF TERMS 



O'YULJE. Lat. plur. of ovula. 



OVULA'TIOST. The production of 

 eggs. 



O'vuw. Lat. An egg. 



OXFORD CLAY. Clunch clay ; an ar- 

 gillaceous bed interposed between 

 the lower and middle oolite, (p. 

 62, Book viii). 



OXIDA'TION. The process of con- 

 verting metals or other substances 

 into oxides. 



O'XIDE. fr. gr. oxus, acid; eidos, 

 form. A compound, which is not 

 acid, containing oxygen. 



OX'YGEN. fr. gr. oxus, arid, sour ; 

 gennao, I engender. The genera- 

 tor of acid, as it was believed to 

 be, exclusively, when this name 

 was given to it. A gas which 

 constitutes about one-fifth of our 

 atmosphere, which is necessary 

 to the respiration of animals, and 

 consequently, indispensable to an- 

 imal life. But it cannot be breathed 

 alone for any considerable time 

 with impunity, requiring to be 

 mixed with about four parts of 

 nitrogen (azote), as is the case in 

 our atmosphere to render it suita- 

 ble for respiration. 



OXYO'PIA. fr. gr. oxus, sharp ; ops, 

 vision. Unusually acute vision. 



OZO'NE. fr. gr. 026, I smell of some- 

 thing. The odorous matter per- 

 ceived when electricity passes 

 from pointed bodies into the air. 



PACHYDE'RMS. An order of quad- 

 rupeds, including the elephant, 

 horse, pig, &c., distinguished by 

 the thickness of their hides. 



PA'cHrDE'itMA. Lat. fr. gr. pachus, 

 thick : derma, skin. Thick-skin- 

 ned 



PACHYUER'MATA. fr. gr. pachus, 

 thick; derma, skin. An order of 

 mammals; pachyderms. 



PA'CHYDE'RMATOUS. Relating to pa'- 

 chyde'rms. 



PA'cHYeuA'TUS.^Lat. fr. gr. pachus, 

 thick; gnathos. jaw. Specific 



name of the labyrinthodon. (p 

 197, Book viii). 



PA'GINA. The surface of a leaf. 



PAGU'RUS. Lat. The hermit-crab. 



PAL^'MON". Generic name of 



prawns. 



PALJSONI'SCUS. fr. gr. palaios, an- 

 cient ; oniskos, a wood-louse. A 

 fossil crustacean. Also, a fossil 

 fish. (fig. 56, p. 48, Book viii). 



PALJEONTO'LOGIST. One skilled in 

 palaeontology. 



PALJEONTO'LOGY. fr. gr. palaios, an- 

 cient; on, creature; logos, a dis- 

 course. That branch of zo'olo- 

 gical science which treats of fossil 

 organic remains. 



PAL-EOPHYTO'LOGY. fr. gr. palaios, 

 ancient; phuton, a plant; logos, a 

 description. That part of natu- 

 ral history which treats of fossil 

 plants. Fossil botany. 



PAUEOTHE'RIUM. fr. gr. palaios, an- 

 cient ; therion, beast. A fossil ge- 

 nus of pachydermatous mammals, 

 (p. 83, Book viii). 



PALEOZOIC. fr. gr. palaios, ancient ; 

 zoe, life. Relating to ancient life ; 

 belonging or relating to fossils. 



PALAP'TERYX. fr. gr. palaios, an- 

 cient; apteryx, (fr. gr. a, priv. ; 

 pteros, wing) wingless. A genus 

 of fossil birds, discovered in New 

 Zealand. 



PALATE. The mouth of a ringent 

 flower. 



PALATI. Lat. Of the palate. 



PA'LATINE. Relating to the palate. 



PA'LEA. Lat. Chaff. 



PA'LEJE. Lat. plur. of palea. 



PALEA'cEous.-Chaffy ; covered with 

 membranous scales. 



PAL'LIAL. Belonging or relating to 

 th e pa 1 1 i um . Pallia I impression i s 

 the mark formed in a bivalve 

 shell by the pallium. 



PA'ILITJM. Lat. A cloak. The 

 mantle of mollusks is so called. 



PALMA'CEJB. Name of a family of 

 plants. 



PALMACI'TES. A genus of fossil 

 plants. 



