FAMILIES AND &ENEIIA OE THE MADEEPOEAEIA. 65 



dentated. Epitheca complete. Endotheca exists. G-emmatiou 

 from the base or from a short or long calcareous stolon of the 

 parent corallite. 



Distribution. — Becent. Cape of Grood Hope, Natal, Australian 

 seas, New-Zealand seas, Singapore. 



It is probable that SolenastrcBa PrestwicJii, Duncan, of the Crag, 

 is a crowded Cylicia with an abnormal growth of exotheca. 



Genus Scolangia, Tennison Woods, Palceont. New Zealand, 

 Corals and Bryozoa, p. 18 (1880). 



Astrangiacese united by a calcareous stolon which covers the 

 wall with concentric layers. Corallites inclined. No spiniform 

 processes on the septa. No columella. 



Distribution. — Fossil. Tertiary : New Zealand, 



In the solitary specimen of the solitary species there does not 

 appear to be a complete ealice in the delineation given. The fossa 

 was wide. It may be supposed that the stolon mentioned above 

 means epitheca. 



Grenus Cetptangia, Milne-JSdwards Sf Jules Haime, Hist. Nat. 

 des Corall. vol. ii. p. 609 (1857). 



Colony budding by stolons which do not become calcareous. 

 Corallites quite free amongst themselves, elongate, cylindro-tur- 

 binate, and with a complete epitheca. Calices circular or sub- 

 circular; fossette well marked, deep. Columella papillary and 

 well developed. Septa thin, dentate, moderately close. Endo- 

 theca exists. Habit : surrounded, by and immersed in Celleporcs. 



Distribution. — Fossil. Miocene : Europe. Pliocene : England. 



The species of this genus are always found immersed ia Celle- 

 'porcB ; and this and their corallite shape and dentate septa of all 

 ages separate it from Cylicia. 



Grenus Ehizatstgia, Milne- Fdwards Sf Jules Saime, Compt. Bend, 

 de VAcad. des Sci. Nat. t. xxvii. p. 496 (1848). 

 Colony forming expansions of calcareous basal structures from 

 which corallites arise. CoralUtes rather close, short, sometimes 

 very much so, sub cylindrical, largely fixed by the base. Calices 

 circular, almost superficial. Columella papillary, the outer part 

 resembling the inner teeth of the septa. Septa numerous, rarely 

 exsert, large, thin, subequal, granular, close, minutely denticulate 

 where free. Epitheca complete. Endotheca exists. 



linn. JOTJEN. — ZOOLOGY, VOL. XVIII. 5 



