866 GLOSSARY OF TECHNICAL TERMS. 



BlOGENETIC. Gr. bios, life ; genesis, origin. Relating to the doctrine that all life springs 

 from antecedent life, in contradistinction to A biogenesis or de novo generation. 



BIOPLASM. Gr. bios, life ; plasma, what is formed. The essential vital element of all 

 organic bodies, equivalent to Protoplasm. 



BLASTOMERE. Gr. blaston, a germ; meros, a portion. The areas delimited by the 

 segmentation of the ovum. 



BUCCAL. Lat. bucca, the mouth. Relating to the mouth or oral aperture. 

 CAMPANULATE. Lat. campanula, a little bell. Having the shape of a bell. 



CANCELLATE. Lat. cancelli, a lattice or grating. Having an open network- or lattice-like 

 structure. 



CARAPACE. Gr. karabos, a crustaceous animal. The indurated dorsal shield possessed 

 by such infusorial forms as Euplotes and Aspidisca. 



CAPILLITIUM. Lat. capillitiTim, the hair collectively. The thread or hair-like filaments 

 developed within the spore-capsules or sporangia of certain Mycetozoa. 



CAPITULUM. Lat. capitulum, a little head. Term applied to the stalked spheroidal 

 spore-receptacles or sporangia of certain Mycetozoa. 



CATACLYSMIC. Gr. kataklysmos, an inundation, deluge. Having reference to sudden 



and abnormal alterations of the conditions of the universe, such as by a deluge or an 



earthquake. 

 CHITINOUS. Gr. chiton, a coat of mail. Corresponding in nature with chitine or the 



horny material which forms the protective covering and skeletal elements of Insects 



and other Arthropoda. 

 CHLOROPHYLL. Gr. chloros, grass-green ; phullon, a leaf. The green colouring-matter 



of vegetable organisms. 

 CHLOROPHYLL ACEOUS. Having the nature of chlorophyll. 



CILIA, Lat. cilium, an eyelash. The fine hair-like appendages that constitute the 

 locomotive organs of a large group of Infusoria and many lower animals. 



CIRRI. Lat. cirrus, a lock of hair. The elongate, flattened modifications of ordinary 

 cilia, developed upon the peristomal region of many Ciliate Infusoria. 



CLOACA. Lat. cloaca, a common sewer. The common cavity upon which the interstitial 



canal-systems of a sponge body open, and are thence discharged into the surrounding 



water. 

 CCENOBIUM. Gr. koinos, common ; bios, life. Term applied by Stein to the spherical 



monad clusters developed at the terminations of the branching pedicle of such a type 



as Anthophysa. 



COMMENSAL. Lat. cum, together ; mensa, table, board. Term applied by Van Beneden 

 to those pseudoparasitic organisms which do not live at the expense of the organisms 

 to which they are usually attached, but are associated with them simply as comrades 

 or messmates. 



COMMENSALISM. Lat. cum, together ; mensa, table, board. The state of existence as a 

 commensal. 



CONJUGATION. Lat. conjugo, to unite. The temporary or permanent growing together 

 of two or more infusorial bodies, such union conducing to reproduction by germs or 

 spores or to the renewal of their capacity to multiply by simple fission. 



CONVOLUTE. Lat. con, together ; -volutus, rolled. Rolled upon itself. 

 CORTICAL. Lat. cortex, bark. Relating to the bark or external layer of an organism. 

 CRATERIFORM. Lat. cratera, a cup ; forma, form. Having the shape of a cup. 

 CRENULATE. Dim. of Lat. crena, notch. Finely notched or serrated. 



