CORALS FROM MURRAY, COCOS-KEELING, AND FANNING ISLANDS. 215 



Plate 50. page of the 



Figs, i, ia, lb. Mussa sinuosa (Lamarck), from Murray Island. Fig. 1, view of side, natural size; fig. ia, 



cahces, natural size; fig. \b, calices, X2 ,,, 



Figs. 2, 2a. Acanthaslrea echinata (Dana), two views of Dana's type of Astrcea echinata, No. 25, ij. S.Nat. 

 Mus. Fig. 2, part of upper surface, X2; fig. 2a, longitudinal section of corallites,' X2 (view^ 

 natural size, plate 51, fig. 1) ' 



Plate 51. 



Figs, i, 2. Acanthaslrea echinata (Dana). Fig. 1, Dana's type of Aslraa echinata, No. 2;, U. S. Nat. Mus 



upper surface, natural size (enlarged views, plate 50, figs. 2, 2a). Fig. 2, variety of the species' 



from Murray Island, X2 



Figs. 3, 3a, 3 b. Herpelolitha stricta Dana. Three views of Dana's type, No. 161, U.S. Nat. Mus. Fig 3 



upper surface, natural size; fig. 3a, lower surface, natural size; fig. 30, costs of lower surface,' 



Xo 



129 



Plate 52.— Merulina ampliata (Ellis and Solander). 



Figs, i, ia, ib. Three views of the same specimen, from Torres Strait. Fig. I, upper surface, X1/3; fig. \a, 



lower surface, X1/3; fig. lb, part of upper surface, natural size ' ' ll? 



Plate 53. 



Figs, i, ia. Herpelolitha crassa Dana. Fig. 1, upper surface; fig. la, lower surface, both natural size, of 



Dana's type of Herpetolithus crassus, No. 160, U. S. Nat. Mus I2q 



Plate 54. 



Fig. 1. Herpelolitha crassa Dam. Specimen from Cocos-Keeling Islands, X 1/2 I2q 



Fig. 2. Polyphylltd talpina (Lamarck). Specimen from Murray Island, X 1/2 130 



Fics. 3, 3a, 4, 4 a. Pachyseris speciosa (Dana). Fig. 3, view natural size; fig. 3a, view, X5, of Dana's 

 type of Agaricia speciosa, No. 199, U. S. Nat. Mus. Fig. 4, view, natural size; fig. 4 a, view, 

 X3, of a specimen trom Murray Island 



Plate 55. 



Figs. 1, la. Pachyseris torresiana, new species. Fig. 1, general view of corallum, natural size; fig. ia, part 



of surface, X3 



Fig. 2. Pavona danai (Milne Edwards and Haime), X2, specimen from Cocos-Keeling Islands. ... . J36 



Plate 56. 



Figs, i, ia. Pavona cactus (Forskal). Two views of a frond of Pavona formosa Dana, No. 135, U. S. Nat. 



Mus. Fig. 1, natural size; fig. ia, X2 r 



Figs. 2, 2a. Pavona danai (Milne Edwards). Two views of type of species, Pavonia boletijor mis ■Dana, 



No. 136, U. S. Nat. Mus. Fig. 2, natural size; fig. 2a, X2 n g 



Fig. 3, 3a, jb. Pavona maldivensis (Gardiner), specimen from Cocos-Keeling Islands. Fig. ], corallum, 



natural size; fig. 3a, calices near edge of corallum, X6; fig. 3b, summit calices, X6 138 



Plate 57. — Pavona varians Verrill. 



Figs, i, ia. Specimen from Murray Island; calices in short, circumscribed series. Fig. 1, natural size- 

 fig, la, calices, X4 ' „ 



Figs. 2, 2a. Specimen from Murray Island; calices in longer series than in specimen represented by figs, i 



and ia, with which it intergrades. Fig. 2, natural size; fig. 2a, X4 n 8 



Fig. 3. Specimen from Cocos-Keeling Islands (photograph, natural size, from Dr. Wood Jones); but the 

 same growth facies is present at Murray Island. It intergrades with the facies represented by 

 figs. 2 and 2a „ 



Figs. 4, 4a. Specimen from Fanning Island. The interserial crests are tall, but it intergrades with the 



facies represented by fig. 3. Fig. 4, corallum, natural size; fig. 4 a, collines and series, X4. . 138 



Plate 58. — Caeloseris mayeri, new genus and species. 



Figs, i, ia, \b. Three views of same specimen. Fig. 1, corallum, natural size; fig. ia, summit calices, X4; 



fig. lb, calices near edge, X4 



Fig. 2. Longitudinal section of corallites, X4 



Figs. 3, 3a. Photomicrographs of a thin section. Fig. 3, X 20; fig. 3a, X30 , ,o 



