16 



CHOUTEAU CORALS 



Axial increase : Growth bj' addition of two 

 or more corallites from a calyx and having 

 new septa and epitheca axially but continu- 

 ing peripheral septa and epitheca of parent. 

 Compound calcular budding. 



Axial pit: Depression of floor of calyx at 

 position of tabularium. Calicular pit. 



Axial plate: Bisects axial column in cardinal- 

 counter plane, may be continuous with car- 

 dinal septum or counter septum or neither. 

 Medial plate. 



Axial septum: Jointed counter and cardinal 

 septa. 



Axial series: Tabulae near axis of corallite. 

 Axial zone. 



Axial tabula: One of inner series. 



Axial vortex: Axial structure formed by 

 twisting of axial ends of septa. Streptocol- 

 umella. 



Axial zone*: Tabulae near axis of corallite. 

 Axial series. 



Basal budding*: Budding trom margm or 

 from definite points near base. Marginal 

 budding. 



Basal disk: Earliest portion of skeleton 

 formed. Basal plate. 



Basal epitheca*: Common investing sheath in 

 massive coralla. Holotheca. 



Basal plate: First formed part of exoskel- 

 eton. 



Base*: Attached edge of septum. Peripheral 

 edge. 



Bourrelet: Encircling expansion on wall, 

 coarser than growth-lines. Varices. 



Bradygenesis: Retardation of ontogenetic de- 

 velopment. 



Brephic stage: Ontogenetic stage in which the 

 six protosepta are formed. Nepionic stage. 



Breviseptal phase: Phase characterized by 

 short septa. Amplexoid in part. 



Budding*: Asexual increase. Gemmation. See 

 Basal, Coenenchymal, Fission, Interstitial, 

 Marginal, Septal, Stolon, Tabular budding. 



Calceolid: Conical corals flattened on one 

 side, may have operculum. 



Calice: Open end of coral; may be deep, shal- 

 low, gently concave, inverted, steep-walled. 

 Calyx. 



Calicinal gemmation: Budding from within 

 the calyx. 



Calicular pit: Depression of floor of calyx at 

 position of tabularium. Axial pit. 



Calicular platform: Area between axial pit 

 and periphery. Peripheral platform. 



Caliculum*: Simple cup-shaped individual. 



Calyx: Open end of coral; may be deep, shal- 

 low, gently concave, inverted, steep-walled. 

 Calice. 



Calyx walls: Lateral portion of calyx, gen- 

 erally consisting of inner edges of septa. 



Caninpid: Corals which change from discoid 

 through trochoid to cylindrical. 



Cardinal: Indicates position of structures or 

 areas within thecarium; cardinal septum de- 

 termined primarily by location of herring- 

 bone pattern of septa on theca; cardinal 

 quadrants lie between alar septa and car- 

 dinal septum. Abbreviated: C. 



Cardinal pseudofossula*: Gap between car- 

 dinal septum and next adjacent septum. 



Carina: Vertical or horizontal flange on sep- 

 ta; may be reduced to rows of spines. 



Carinate: Having carinae. 



Ceratoid: Conical corals with apical angle of 

 about 20°. 



Cerioid: Massive corals possessing individual 

 walls. 



Coenenchymal budding: Development of new 

 corallite from connective tissue in massive 

 coralla. 



Coenenchyme : Common connective tissue be- 

 tween corallites of some massive coralla. 



Columella: Simple solid axial rod or plate 

 extending lengthwise. Columnella. 



Columnella*: See Columella. 



Complete tabulae: Extend across thecarium. 



Concentric dissepiments: Have uniformly 

 arched upper surfaces convex distally, uni- 

 formly distributed between septa. 



Cone-in-cone: Superimposed series of prox- 

 imally tilted tabulae. 



Conical: Cone-shaped. See Calceolid, Cera- 

 toid, Haploid, Patellate, Pyramidal, Tro- 

 choid, Turbinate. 



Conico-cylindrical: Conical proximally and 

 cylindrical distally. 



Contiguous : Touching. 



Continuous septum: Septum with trabeculae 

 1 completely fused to form longitudinal 

 plate. 



Contratingent: Minor septa joined to adja- 

 cent major septa towards counter quadrants. 



Corallite: 1 Skeleton of simple coral. 



Corallite: 2 Skeleton of individual coral in a 

 colony. 



Corallum: 1 Skeleton of a compound coral. 



Corallum: 2 Skeleton of a simple coral. 



Costa: 1 Longitudinal ridge on epitheca coin- 

 ciding in position with a septum. 



Term not recommended. 



