371 



Confluent — blended so that the hue of deinai-catioii is not 

 visible. 



Corallites — the indivichial tnbes of a eomponnd corallnm. 



Coralluni — the calcareons skeleton of a single, oi- of a colo- 

 nial, coral stock. 



Corneo us — horny . 



CostiP — the extrathecal extensions of the septa of the 

 corals. 



CostaJs — the hrst brachial or arm-plates of the Crinoids 

 lying between the radials and the first bifnrcation of the 



arms. 

 Counter quadrants — the qnadrants bonnding the connter 



septnm of a Tetracorallnm. 

 Counter septum — the front primary septum of the Tetraco- 



ralla, opposite the cardinal septnm ; the secondar^^ septa 



are parallel to it. 

 Crenulated — notched, so as to prodnce series of teeth. 

 Crura — the apophyses to which the brachidiumof the Brach- 



iopods is attached. 

 Cuneate — wedge-shaped . 

 Cyathophrlloid — in form like Cyathophyllum ; one of the 



Tetracoralla. 

 Cyst — a closed cavit}'. 



Delthyrium — the triangnlar fissnre nnder the beak of the 



pedicle valve of the Brachiopoda. 

 Deltidial plates — the two jjlates which close the delthyrinm 



in the higher Brachiopoda (Telotremata). 

 Deltidium — the single covering i)late of the Delthyrinm (also 



called pedicle plate). 

 Dendroid — branching after the Jiianner of a tree. 

 Denticula te — toothed . 



Denticulation — set of denticles or small teeth. 

 Dicyclic — with two cycles of basals; applied to Crinoids. 

 Diduct or muscles — opening muscles of the Brachiopoda. 

 Discmoid — resembling Discina. 

 Discoid — disk-like. 



