xx GLOSSARY OF TECHNICAL TERMS 



COROLLA (Lat., little wreath), one of the whorls of modified 

 leaves of which a flower is composed, usually formed of 

 gaily coloured petals. 



CORPORA LUTE A (Lat., yellow bodies), glandular structures which 

 make their appearance on the surface of the ovary (in 

 mammals) at the spots whence ova have been discharged. 



CORPUSCLE (Lat. corpusculum, little body), a term applied to 

 certain cells, such as blood corpuscles. 



CORRELATION, the dependence of one character upon another. 



CORTICAL (Lat. cortex, bark, rind), belonging to a protective outer 

 layer. 



COSMOPOLITAN (Gr. KO'O-JUIO?, world ; TroAiTrj?, citizen), of world- 

 wide distribution. 



COSMOZOA (Gr. Mo-pas, universe ; C<j>oy, living thing), minute 

 germs which are supposed to float about in space between 

 the planets (purely imaginary). 



COTYLEDONS (Gr. KoruArjSoVes, suckers), the seed-leaves of flowering 

 plants. 



CRETACEOUS (Lat. creta, chalk), a term applied to the geological 

 period in which the chalk rocks were deposited. 



CRYPTIC (Gr. KpuTiroy, hidden), a term applied to colouration when 

 adapted for concealment. 



CRYSTALLOIDS (Gr. KpvoraAAo?, crystal ; eiSoj, form), a group of 

 chemical substances which usually form crystals and which 

 are capable of diffusing through organic membranes. 



CYCLOPEAN (Gr. KVKX^, cyclops), having a single eye in the 

 middle of the head. 



CYCLOSTOME (Gr. Kv/cAos, circle; oro/mo, mouth), a term applied 

 to the lampreys on account of their suctorial circular 

 mouths. 



CYST (Gr. KVO-TTI, bladder, bag), a protective envelope formed 

 around an organism during a period of rest. 



CYTOLOGY (Gr. /euros, a hollow vessel [cell] ; Ao'yos, discourse), 

 the special study of cells. 



CYTOLYSIS (Gr. KUTOS, cell ; Aim?, breaking up), the disintegra- 

 tion of cells. 



CYTOPLASM (Gr. KVT-OJ, cell ; TrAa^a, lit. that which is moulded, 

 used in the sense of the formative material), the proto- 

 plasm of the cell body, outside the nucleus. 



CYTOSTOME (Gr. KVTOS, cell ; oro'/xa, mouth), the mouth of a 

 unicellular organism. 



