264 NEW YORK STATE MUSEUM 



biserial — with double series or rows 



brachial — pertaining to the brachia or arms of brachiopods or crinoids; one 

 of the arm plates of crinoids 



brachidium — calcareous support of the arms in brachiopods 



branchiae — gills 



bryozoum — whole compound colony of the bryozoa 



bulbiform — bulb-shaped 



byssal notch — notch or opening for the emission of the byssus (supporting- 

 threads spun by the foot) in the pelecypoda 



calicinal — pertaining to the calyx or cup 



callosity — hardened spot or area 



callus — thickened part of the inner lip of gastropods, which usually covers 



portions of the preceding volutions 

 calyx- — 1) cup of corals, limited below by the septa; 2) body, exclusive of 



the arms, of crinoids, cystoids and blastoids 

 camerate — chambered; an order of crinoidea 

 camerae — air-chambers of a cephalopod shell 

 canaliculate — channeled; having a canal 



cancellated — marked by lines crossing each other; lattice-like 

 carapace — hard shell or shield of Crustacea 



cardinal — pertaining to the area of the beak in brachiopods and pelecypods 

 cardinal process — process from under the beak of the brachial valve of 



brachiopods, to which the diductor (opening) muscles are attached 

 cardinal quadrants — two quadrants of a Tetracorallum which bound the 



main, or cardinal, septum 

 cardinal septum — first or main of the four primary septa of a Tetracorallum; 



the cardinal septum has the pinnate arrangement of the secondary septa 



on both sides 

 cardinal teeth — teeth under the beak in the pelecypods; teeth in the pedicle 



valve of the brachiopods 

 carina — projecting ridge running down the center of the branches in some 



fenestelloid and other bryozoa; the projecting ridges on the septa of 



Heliophyllum and other corals 

 carinated — having a ridge or keel 

 cartilage — compressible, elastic substance between the hinge-margins of the 



valves of pelecypods. The cartilage is the internal, as the ligament is 



the external medium for opening the valves 

 cast — the impression taken from a mold 

 caudal — pertaining to the tail 

 celluliferous — cell bearing (bryozoa commonly have a celluliferous and a 



non-celluliferous side) 

 cephalic limb — anterior border of the cephalon of a trilobite 

 cephalon — head-shield of trilobites 



cephalothorax — combined head and thorax of Crustacea 

 cercopods — lateral tail spines in the ceratiocarida 



