IQO GLOSSARY 



Canals, channels through the body- walls of sponges. 



Car'a pace, the shell which covers a portion or all of the cephalo-thorax in 

 crustaceans. 



Car'di nal, pertaining to a cardo or hinge. 



Car niv'or ous, flesh-eating. 



Car ot'id, a large artery which supplies the brain and head with blood. 



Car'pal, a bone of the wrist. 



Cat'er pil lar, the larva of a butterfly or moth. 



Caud al, pertaining to the tail. 



Cell, the smallest living unit. 



Cell-wall, the lifeless membrane surrounding many cells, secreted by the pro- 

 toplasm. 



Central cavity, the cavity surrounded by the body-wall in the simpler many- 

 celled animals, as in the sponges. 



Ceph a lop'o da, the class to which the squid, octopus, nautilus, etc., belong. 



Ceph'al o-tho'rax, the division of the body formed by the fused head and 

 thorax in many arthropoda. 



Cer'vi cal groove, the groove marking the place of union when head and 

 thorax are merged into a cephalo-thorax. 



Cha la'za, one of the spiral masses of albumen found at the two ends of a 

 bird's egg. 



Che'lipeds, the large claws in many crustaceans. 



Chor-date, animals with a. notochord, present throughout life or disappear- 

 ing. 



Chro mat'o phore, color body. 



Chrys'a lis, the pupa stage of a butterfly. 



Ciri um (pi. cilia), a minute vibrating hair on the surface of many cells. 



Co coon', the envelope spun by certain larval insects in which they are inclosed 

 during the pupa stage. A similar structure, as the egg-case of spiders, 

 earthworms, etc. 



Coe'cum (se'kum), a blind pouch or bag ; a sac open at one end. 



Coe len te ra'ta, rather simple, sac-like animals with nettle cells in the body 

 ,waJJs. 



Co le op'te ra, beetles. 



Col'ony, a group of animals, of the i same kind found in one locality, usually 

 related. to each other and often actually connected. 



Com men'sal ism, an association of two animals, not mutually helpful, but 

 without injury to either. 



Com pound eye, an eye made up of many simple eyes or eye elements. 



Com pressed', narrower /rom side to side than from dorsal to ventral surface. . 



Con ju,^',tion, -.a process occurring in some, one-celled animals, preceding 

 reproduction. In this process two animals unite temporarily a,nd exchange 



