220 EXPLANATION OF TERMS. 



Ciliated. Furnished with a fringe like eye- 

 lashes ; from cilia, an eyelash. 



Cordate. Heart-shaped ; from the Latin (cor) 

 a heart. 



Contracted. The mouth is called contracted, 

 when the lips are not separated by any 

 channel or sinus ; it then holds liquids 

 though filled up to the brim. 



Congener. One of the same genus ; from con, 

 together and genus, a kind. 



Coronated. Crowned or girt towards the apex. 



Cancellated. Crossed like the bars of a latticed 

 window ; from cancelli, lattice. 



Complicated. Folded together; from con, with, 

 together, and plicare, to fold. 



Digitations or Claws. Finger-like lobes ; from 

 digitws, a finger. 



Dextral. Righthanded, turning round the pil- 

 lar from left to right, the usual course of 

 the whorls ; from dextra, the right hand. 



Dorsal. Belonging to the back ; from dorszm, 

 the back. 



Deciduous. Falling, not lasting ; from decido, 

 I fall. 



Dentated. Toothed ; from dens, a tooth. 



Diaphanous. Capable of transmitting light, 

 transparent; from the Greek &a (dia) 

 through, and paivu (phaino) I appear. 



Decorticated. Having the bark or outer skin 

 taken off ; from de, off, and cortex, bark. 



Dissepiment. A division between two chambers 

 in a shell ; from sepes, a hedge, and dis, 



