USED IN NATURAL HISTORY. 



83 



INDURATED. Hardened. 



I.YDU'SIAL. fr. lat. indusium, a tunic. 

 Applied to a fresh-water lime- 

 stone, which contains incalculable 

 numbers of indusia or cases of 

 larvae of the phryganea. 



INDU'SIUM. fr. lat. induo, to putori. 

 That portion of the epidermis of 

 ferns which covers the sori. Also, 

 applied to the peculiar form of 

 the hairs of the style in certain 

 plants, when they are united into 

 a cup, enclosing the stigma. 



INDU'VIJE. fr. lat. induvwe, clothes. 

 The withered remains of leaves, 

 which, not being articulated with 

 the stem, do not fall off, but de- 

 cay with it. 



INDU'VIATE. Covered with indu- 

 viae. 



INEQ.UILA'TERAL. fr. lat. inaqualis, 

 unequal ; latus, lateris, side. Hav- 

 ing unequal sides. When the an- 

 terior and posterior sides of a 

 shell make different angles with 

 the hinge. 



lNE'q.inv*LVE Where one valve is 

 more convex than the other, or 

 dissimilar in other respects, as in 

 the common oyster. 



INFERIOR. Below. A calyx or co- 

 rolla is inferior when it comes out 

 below a germ. A fruit or ovary 

 is termed inferior, when the ca- 

 lyx adheres to its walls. That 

 valve of adherent bivalves by 

 which they are united to other 

 substances is termed the inferior 

 valve. 



IN'FEROBRANCHIA'TA fr. lat. inferus, 

 below ; branchia, gills. Name of 

 an order of gasteropods which 

 have the branchiae below the 

 mantle, (p. 62, Book v). 



INFILTRA'TION. fr. lat. filtrare^ to 

 filter. The act of filtering through, 

 producing an accumulation of li- 

 quid. 



INFLA'TED. Blown up and hollow. 



INFLE'XED Bending inward. 



INFLORE'SCENCE. fr. lat. infloresco, to 

 flourish. The flowering of plants. 



The arrangement of flowers upon 

 a branch or stem. 



INFO'LDED. Folded in. 



INFUNDI'BULAR. ") fr. lat. infundi- 



INFUNDIBU'LIFORM. j bulum, a fun- 

 nel. Funnel-shaped. 



INFUSO'RIA. fr. lat. infundo, I pour 

 in. A class of microscopic ani- 

 malcules, which are for the most 

 part developed in infusions of 

 decayed animal and vegetable 

 substances. 



INFUSO'RIAL. Belonging or relating 

 to the infusoria. 



INGE'STA. Food taken into the sto- 

 mach. 



INGLU'VIES. Lat. The crop of a 

 bird. 



INNA'TE. A botanical term, applied 

 to the anther, when it is attached 

 by its base to the apex of the 

 filament. 



INOCE'RAMI'S fr. gr. en, with ; ke- 

 ramos, earthenware. A genus of 

 bivalve fossil shells, which are 

 chiefly characterized by their 

 hinge and the fibrous structure of 

 their constituent substance. The 

 shell, in consequence of the ver- 

 tical arrangement of the fibres, 

 readily breaks to pieces, and it is 

 often extremely difficult to extri- 

 cate a specimen with the hinge 

 and beaks tolerably entire. 



IN OPE'RCTTLAR. fr. lat. in, not ; oper- 

 culum, a lid. A term applied to 

 univalve shells which have no 

 operculum. 



INORGA'NIC Without organs or or* 

 ganization. 



INOSCULA'TION. fr. lat. in, in ; oscu- 

 /wm, a little mouth. Anastomosis. 

 The union of vessels. 



IN PLACE. In their original position 

 where they were formed. 



INQ.UIXA'TA. Lat. Stained, dirty. 



INSECT. fr. lat. aecare, to cut. The 

 generic name of small animals 

 whose body is, as it were, divi- 

 ded or cut into several parts ; as 

 the chest and belly. ^ Insects have 

 neither a circulating apparatus, 



