GLOSSARY. 23 



Caulis (L. a stalk). An aerial stalk of a plant. 



Ca'vum arterio'sum (L. arterial cavity). The left portion of 



the ventricle in the turtles. 

 Ca'vum pulmonale (L. pulmonary cavity). The portion of the 



ventricle in the turtles from which the pulmonary artery 



arises. 

 Ca'vum veno'sum (L. venous cavity). The right portion of 



the ventricle in the turtles. 

 Cecomor'phae (Gr. kex, kekos, a sea-gull ; morphe, form). The 



Gulls, a group of birds. 

 Celeomor'phae (Gr. keleos, a woodpecker; morphe, form). The 



Woodpeckers. 

 Cellulose (L. cdlula, a little cell). A vegetable substance of 



which the cell-wall of plants is composed. 

 Cen'trum (L. centrum, the centre of a circle). The cetnral 



portion, or body of a vertebra. 

 Centrum ovale (L. oval centre). A mass of white substance 



in the cerebrum. 

 Cephalas'pidae (Gr. kephale, the head; aspis, a shield). An 



extinct sub-order of Ganoid fishes. 

 Cephalic (Gr. kephale, the head). Relating to the head. 



Applied to a pair of nerve ganglia in the anterior part of 



the body in the Mollusca. 

 Ce'phalo-humeralis (Gr. kephale, the head; L. humerus, the 



upper part of the arm). One of the muscles of the 



humerus in some Vertebrata. 

 Cephalo'poda (Gr. kephale, the head; pous,podos, a foot). A 



division of the Mollusca, so called because the organs of 



locomotion are arranged round the head. 

 Cephalos'tegite (Gr. kephale, the head; stego, I cover). The 



anterior division of the carapace in some Crustacea. 

 Ce'phalo-tho'rax (Gr. kephale, the head; thorax, a breast- 

 plate). The anterior portion of the body in the Cnistacea 



and Arachnida, formed of the coalesced head and thorax. 

 Ce'rato-hyal (Gi.keras, a horn). The lower ossification of the 



hyoidean arch in the Teleostean fishes; represented in 



human anatomy by the lesser cornua of the hyoid bone. 

 Cer'ci (Gr. kerkos, a tail). A pair of styles at the hinder 



extremity of the abdomen in the cockroach. 

 Cerebellum (L. the little brain). The part of the brain which 



overlies the fourth ventricle. 

 Ce'rebrum (L. the brain). The brain proper; applied to all 



those parts which lie above the cerebellum. 



