FAMILIES AND GENEEA OE THE MADEEPORAEIA. 59 



The species Dasmosmilia variegata, Pourtales, lias for its synonyms 

 Parasmilia variegata, Pourt., and BathycyatJius elegans, Studer. 



Genus Coin^osmilta, Duncan, Fossil Corals from the Australian 

 Tertiaries, Ann. ^ Mag. Nat, Hist., Sept. 1865, p. 3, pi. viii. 

 figs. 3-5. 3 species. 



Corallum simple, pedicellate, conical. Calice elliptical. Co- 

 lumella of one or two twisted laminae, essential. Septa entire, 

 octameral or liexameral in arrangement, arise at tlie margin be- 

 tween the costse. Costse broad, oruamented or sharp at the margin, 

 and broad below. Endotheca sparingly developed. Epitheca 

 absent or pellicular and ornamented. 



Distribution. — Fossil. Australian Tertiaries. 



This genus I now place amougst the Trochosmiliaceae instead 

 of amongst the Madreporaria Eugosa. 



Tribe II. 



Genus Lithophtllia, Milne-Fdwards ^ Jules Haime, Hist. Nat. 

 des Corall. vol. ii. p. 290 (1857). 



Syn. Scolymia, Haime ; Cynarina, Brligg. 



The corallum is simple and largely fixed, turbinate, subturbi- 

 nate, cylindro -turbinate, cylindrical, or even prismatic in shape. 

 The wall has well-developed spined costse. The calice is shallow, 

 circular or subcircular. The septa are well developed, broad, 

 numerous, very granulated on the sides, spinulose on the free 

 edge. Columella well developed, spongy, flat above and a little 

 sunken ; its trabecules are lamellar and twisted. Epitheca 

 absent. Endotheca largely developed. 



Distribution. — Fossil. Miocene : West Indies and Europe. — 

 decent. Caribbean Sea. 



Genus Circophtllia, Milne-Fdwards ^ Jules Haime, Compt. 

 Bend, de VAcad. des Sci. t. xxvii. p. 491 (1848). 



The corallum is simple, turbinate, or tall and pedunculated. 

 The wall has fine, close, simple granular costse and a rudimentary 

 epitheca. The calice is circular and shallow ; the septa very nume- 

 rous, broad, exsert, and have the free surface more or less lobed. 

 The columella is large and papillary. The endothecal dissepi- 

 ments are numerous. 



Distribution. — Fossil. Eocene : Europe, "West Indies. 



The genus Leptaxis, Eeuss, appears to be a CircopJiyllia with 



