GLOSSARY 



19 



Palicolumella: Axial structure consisting of 

 thickened or unthickened axial plate par- 

 tially separated from counter septum. 



Palmate : Septa in bunches with one septum 

 near the middle being generally the longest. 



Parietal budding: Budding from some point 

 in walls. Lateral budding. 



Parricidal budding. Involving death of par- 

 ent polyp. 



Patellate: Conical corals with apical angle 

 of 120° or more. 



Perforate septum : Discontinuous septum with 

 trabeculae forming open meshwork. 



Perforate septum: Having holes. 



Periaxial tabula*: 1 One of outer series. 



Periaxial tabula: 2 Tabula between axial 

 series and inner wall. 



Peripheral area: That portion of thecarium 

 located peripherally from inner wall. 



Peripheral edge: Attached edge of septum. 

 Base. 



Peripheral increase: Formation of offsets con- 

 sisting mainly of neo-tissue, originating 

 from dissepimentarium. 



Peripheral platform: Area between axial pit 

 and periphery. Calicular platform. 



Peritheca: 1 Outer wall of compound coral. 

 Holotheca. 



Peritheca*: 2 Sheath covering proximal por- 

 tions of colony. 



Petraeoid: Addition of stereoplasm in space 

 left by amplexoid retreat of septa. 



Phase: Part of coral differing from remainder 

 without ontogenetic cause. 



Phyllotheca: Inner wall formed by bending of 

 septa at right angles and fusion of bent 

 portions. 



Phaceloid: Fasciculate with parallel coral- 

 lites. 



Pinnate: Tendency of some septa (notably in 

 cardinal quadrants) to lean toward car- 

 dinal septum. 



Platform: Flat bottom or floor of calyx. 



Plocoid: Massive corals without individual 

 walls between corallites. 



Polyp*: 1 Living coral. 



Polyp: 2 Fleshy part of a coral. 



Polypidum*: (Obsolete.) Colony, especially 

 of prostrate corals. Corallum. 



Primary septa: 1 Cardinal, counter, and both 

 alar septa. 



Primary septa*: 2 Cardinal, counter, both 

 alar, and both counter-lateral septa. Proto- 

 septa. 



Principal septa: Primary 2 and secondary 

 septa. 



Prismatic: Massive corals with adjacent 

 corallites in contact at all points. Astrae- 

 form, in part. 



Proliferation*: Increase of corallum. Budding, 

 Gemmation in part. 



Prostrate: Lying horizontally or close to sub- 

 stance upon which calyx grows. 



Protocorallite: Skeleton of initial corallite 

 in colony. 



Protosepta: Cardinal, counter, both alar, and 

 both counter-lateral septa. Primary septa 2. 



Prototheca: Conical or cup-shaped embryonic 

 exoskeleton. 



Proximal: Oldest portion. 



Pseudocolumella: Axial structure more com- 

 plex than columella. 



Pseudocosta: Longitudinal ridge on epitheca 

 not coinciding with septa. Intersepted ridge. 

 Ruga, Costa 2. 



Pseudoseptum: Vertical ridge on exterior of 

 theca; unrestricted in usage. Interseptal 

 ridge, in part. 



Pseudothecalia: False theca formed by thick- 

 ening, fusion of peripheral ends of septa. 



Pyramidal: Conical corals flattened on three 

 or four sides. 



Quadrant: One fourth of thecarium; either 

 cardinal or counter indicating position be- 

 tween an alar and either cardinal septum 

 or counter septum. 



Radial: Radiating from axis, especially re- 

 lating to septal pattern in late stages. 



Radiciform process*: Prolongation near the 

 apex. Rootlet. 



Recessive: Septa not reaching periphery. Lons- 

 dale oid septa. 



Rejuvenation: 1 Addition of new constricted 

 calyx smaller than parent but otherwise 

 identical. Rejuvenescence in part. 



Rejuvenation: 2 Addition of new calyx within 

 parent calyx; unrestricted usage. 



Rejuvenescence: Constriction of corallite fol- 

 lowed by expansion, involving recapitulation 

 of youthful characters. Rejuvenation 1 in 

 part. 



Reticulate: Forming mesh-work. 



Retiform septum: Perforate with connecting 



bars between it and adjacent septa. 

 Rhopaloid septum: Axially swollen or dilated. 

 Right cardinal quadrant: Portion of theca- 

 rium between cardinal septum and right 

 alar septum when counter is orientated 

 away from observer. 



Term not recommended. 



