:]S:l GLOSSARY. 



Ich-thy-o-mor'pha (Gr. ichfkus ; morphe^ shape). An order of Amphibians, 



ol'ten called Urodela^ comprising the fish-like Newts, etc. 



IcH-TnY-opH-THi'RA (Gr. ic/itkus ,' phtlir-lr^ a louse). An order of Crustacea 

 comprising animals which are parasitic upon Fishes. 



IcH-Tny-Op'si-DA i^Gr. ichtlius ; opsis^ appearand-^). Tlie primary division of 

 V'ertehrata^ comprising the Fialies and Amphibia. Often spoken of as the 

 Branchiate Vtrttbrata. 



Icn-T:iY-op-TEK-YG'i-A (Gr. ■iclithu.'^ ; pterux, wing). An extinct order of 

 Reptiles. 



Ioh-thy-o-sau'ki-a (Gr. i':htliaf< : mura^ lizard). Synonymous with L-htliy- 

 opterygla. 



Il'i-um. The haunch-bone, one of the boncb of the pelvic arch in the higher 

 Vertebrates. 



I-ma'go (Lat. for an image or apparition). Tlie perfect insect, after it has 

 undergone its metamorplaoscs. 



Im'dri-ca-ted. Applied to scales or plates which overlap one another like 

 tiles. 



In-ci'soe (Lat. incido^ I cut). The cutting teeth fixed in the intermaxillary 

 bones of the Mammalia^ and the corresponding teeth in the lower jaw. 



Tn-e-qui-lat'er-al. Having the two sides miequal, as in the case of the 

 shells of tlie ordinary bivalves [LajneUihranchiata]. When applied to the 

 shells of tlie Foramii'ifera^ it implies that the convolutions of the shell do 

 not lie in the same plane, but arc obliquely wound round an axis. 



In-e'qui-valve. Composed of two unequal pieces or valves. 



In-fun"-dib'u-lum (Lat. for funnel). The tube formed by the coalescence or 

 apposition of the epipodia in the Ct^^/ffl^o^^oi/a— commonly termed the 

 '^ tunnel," or " siphon." 



Ln-fu-so ri-a (Lat. infasum^ an infusion). A class of Protozoa^ so called be- 

 cause they are often developed in organic infusions. 



In'guin-al (Lat. ingue/i, ^roinj. Connected with, or situated upon, the groin. 



Ix-o-per-cu-la'ta (Lat. ^/i, without; operculum^ a lid). The division of pul- 

 monate Gasteropoda in which there is no shelly or horny plate (operculum; 

 by which the shell is closed wlien the animal is withdrawn within it. 



In-seo'ta (Lat. inseco, I cut into;. The class of Articulate animals commonly 

 known as Insects. 



[x-sec-tiv'o-ea (Lat. iu^ednm^ an insect; voro^ I devour). An order of 

 Mammals. 



In sec-tiv'o-eous. Living upon Lisects. 



Ix-ses-so'res (Lat. insidvo^ i sil upon). The order of the Perching Birds, 

 often called Paft^eres. 



In-ter-am-bt-la'cra (Lat. iiiter^ between; amhulacrinn^tXx^i which serves 

 for walking). The rows of plates in an Eehlnoderm which are not per- 

 forated for the emission of the " tube-feet." 



In-ter-max-il'l.e, or Pr.e-max-il'l.-e (Lat. inter^ between; prce^ before; 

 i7ha.eAlla^ the jaw). The two bones which are situated between the two 

 su}>erior maxiilie in Vertthrata. In man, and some monkeys, the pnemax- 

 illic anchylose with the maxilhe, so as to be in-ccognizable in the adult. 



In-tus-scs-cep'tion fLat. i/itas^ within; susciplo^ I take up). The act of 

 taking foreign matter into a living being. 



iN-vER-TE-BiiA'TA (Lat. ifi^ without ; -vertebra^ a bone of the back). Animals 

 without a spinal column or backbone. 



Is'cHi-uii (Gr. wdtlori^ the hip). One of the bones of the pelvic arch in Ver- 

 tebrates. 



l-sop'o-DA (Gr. iw.9, equal; jmdeA^ feet). An order of Cmslaci^a in which tho 

 feet are like one another and equal. 



Ju'gu-laPv (Lat. jugulum^ the throat). Connected witli, or placed upon, the 

 throat. Applied to the ventral hns of lishes when they arc placed beneath 

 or in advance of the pectorals. 



Kai-nu-zo'ic (Gr. fcainos, recent; .:o'\ life). The Tertiary period in Geology, 



