FAMILIES ATfD GET^ERA OF THE MAUREPORARIA. 157 



G-enus Lophoseris, Milne-Edwards Sf Jules Haime, 18i9 ; La- 

 mar cJc, Hist. Anim. sans Verteh. t. ii, p. 238 (1816); amended 

 Journ. Linn. Soc, Zool. vol. xvii. (1883), p. 313, pi. xiii. figs. 

 7-12. 

 Syn. Pavonia, Lmk. 



Colony adherent, thin, foliaceous, erect, in lobes or crests, 

 irregular in shape, with radiating calices, confluent by their 

 septo-costse ; on one or both surfaces and between and on low 

 crests placed more or less vertically, over which septo-costae 

 pass. Columella tubercular or rudimentary, deep. Common 

 plateau naked and striated. Septa solid or trabecular in parts. 

 Calices rather elongate, circular when young, surrounded by a 

 wall or by synapticula fused into a mural condition. Synapticula 

 well developed, and distinguishable from ornamental granulation. 

 G-emmation occurs between the calices and amongst the septo- 

 costse. 



Distribution. — Recent. Pacific, from west coast of America to 

 Australia, east of China, Japan, Hong Kong, Indian Ocean, Eed 

 Sea, Burmese seas. 



Yerrill states that it does not exist in the Atlantic. 



Subgenus Haloseris, (genus) Milne-Edwards Sf Jules Haime, 

 Hist. Nat. des Cor all. vol. iii. p. 77 (1860) ; L. Bousseau^ 

 Toy. au Pole Sud (1834). 



Colony fixed, forming small frondescent folded laminae, much 

 incised at the edges, and crispate. Calices indistinct on the 

 internal surface, which is covered with very long septo-costal 

 rays, which are very granulated. Columella rudimentary. Ex- 

 ternal surface delicately striated. Synapticula exist. 



Distribution, — Becent. Philippines. 



Grenus Tichoseris, QuelcJi, Ann. Sf Mag. Nat. Hist. 1884, 

 vol. xiii. p. 295. 

 Corallum compound, massive, columnar or lobate, with neither 

 transverse calicinal ridges nor longitudinal crests, astraeiform. 

 Calicles with distinct solid walls, which are thin at their edges 

 but thick at their basal parts ; calicinal centres arranged either 

 singly within their own wall, or united in more or less irregular 

 and sinuous groups of two or more, incompletely separated from 

 each other and surrounded by the common wall of the calicle 

 from which they are developed. New calicles arise either by 



