GLOSSAET. 269 



Concha. The external ear. 

 Condyle. The articulating surface of a bone. 

 Conjugation. " The coalescence of two similar masses of proto- 

 plasm ;" not supposed to be of a sexual nature. 

 Conjunctiva. The mucous membrane of the eye, covering the 



anterior surface and reflected internally on the eyelids. 

 Connexivn.m. The lateral more or less expanded border of the 



abdominal segments in certain Heteropterous Hemiptera. 

 Coracoid. A process of the scapula or sometimes a separate 



bone. 



Corallite. The corallum secreted within the body of a polype. 

 There may be a single corallite, or several connected by a coe- 

 nenchyma. 

 Corallum. The skeleton or hard structure deposited in the 



tissues or by the tissues of the coralligenous Actinozoa. 

 Corbel. A hollow or cavity partially closed by a plate in which 



the tarsus is inserted in certain Coleoptera. 

 Corbiculum. The dilated posterior tibia of the Apidse is some- 

 times so named. 

 Corbulce. Basket-shaped receptacles which enclose the gonangia 



in Aglaophenia. 



Corium. The middle portion of the hemelytron in the Hemi- 

 ptera, between the clavus and the cuneus. 

 Corneule. Applied to the transparent "segments " which defend 



the eyes of insects. 

 Corpus callosum. A layer of transverse fibres forming the great 



commissure of the brain connecting the two hemispheres. 

 Correlation. The mutual relation or association of phenomena 

 or of parts. The correlation of parts does not always imply 

 correlation of development. 

 Cotyledonary. When the villi of the placenta are collected 



into bundles. 

 Cotyloid cavity. The opening in which the coxa of insects is 



placed. 



Coxa. The basal joint of the leg in insects. 

 Coxopodite. The basal joint of the leg of a Crustacean. 

 Craspeda. Convoluted cords formed in the Actiniae and furnished 



with thread- cells. 



Crepitaculum. A talc-like spot at the base of the upper wings in 

 certain Locustidae. 



