86 PEOF. p. MARTiisr dtjncan's eevision op the 



Genus Manicina, Ed. & H. 

 Genus M^andrina, Ed. & H. 



Subgenus Cceloria, Ed. & H. 

 Genus Leptouia, Ed. & H. 



Genus M^ANDRASTRiEA, Ed. & H. 



Genus Brachym^andrina, Duncan. 

 Genus Stelloria, d'Orb. 

 Genus Platygyra, Ehr., absorbed. Cceloria becomes a 

 subgenus. 



Tribe I. 



Genus DENDEOaTEA, JEhrenherg, Corall. des roth. Meer. 



p. 100(1834). 



The colony is massive and often columnar in shape, or simply 

 convex. The corallites form tortuous series which are completely 

 united by their walls. The calices are confluent and subdistinct 

 in series, and are in shallow valleys between broad, flat, compact 

 eollines or ridges. The columella is formed of a series of com- 

 pact swellings, or of small interrupted laminae, and is sometimes 

 rudimentary. The septa are very thick, unequal, and close ; they 

 are entire. The walls on the ridges are very stout, and some- 

 times there is a slight depression along the axis of the ridge. 

 Endotheca exists largely. The columns appear to be prong-shaped 

 growths from large hemispherical masses. 



Distribution. — Becent. Antilles. Other localities unknown. 



The genus Pectinia of Oken (1815) in part, and the genus 

 Ctenophjllia, Dana, 1846, merged into the genus Pectinia of 

 Milne-Edwards & Jules Haime in 1857. The synonymy of the 

 genus and species is given in the ' Hist, Nat. des Corall.' vol. ii. 

 pp. 206-210 (1857). 



Genus Pectinia, Milne-JEdwards Sf Jules Haime, Hist. Nat. 

 des Corall. vol. ii. p. 206 (1857). 



The colony is pedunculate or sessile, grows but little at the 

 base, and presents a large calicular surface. The corallites are 

 united by their walls, and sometimes with some coenenchyma. 

 The calices are in series, are indistinct ; their valleys are very 

 long and broad ; and the columella is lamellary, and reaches 

 from one end of the calicular series to the other. The septa 

 are entire, stout, granula.r, and exsert. There are accessory 

 laminae (pali ?) before the septa of the last cycle attached to the 

 columella. Eidges (eollines) well developed, may show inter- 



