2l8 PAPERS FROM THE DEPARTMENT OF MARINE BIOLOGY. 



„ . PAtiE OF THE 



' '-'^■^'^ 7b- DESCRIPTION 



Fics. I, \a, 2. -Vcro/iora ifigid/ira (Dana), from Murray Island. Fig. I, corallum, X1/2; fig. la, a branch, 



X3; fig. 2, hranrh of another specimen, natural size 175 



F1C.1. 3, 3a, 3i. Acropora offllala (Klun/.inger) var., from Cocos-Keeling Islands. Fig. 3, corallum, natural 



size; fig. 3a, part of upper surface, X3; fig. 3*, apical corallite, X8 177 



Plate 77. — Acropora gemmiffra (Brook), from Murray Island. 



Fig. I. Corallum, X1/3; fig. la. branches of same specimen, natural size 177 



Fig. 2. Fig. 2, corallum, X1/3; fig. 2a, branches of same specimen, natural size 177 



Fig. 3. Fig. 3, corallum, X1/3; fig. 3a, branch of same specimen, natural size 177 



Plate 78.- — Acropora palifera (i.amarck), D.nna's type of Madrcpora tahrosa. No. 315, U. S. Nat. Mus. 



Fig. I. General view of part of cor.illum, natural size 178 



Fig. la. Summit calices, X4 178 



Fig. lb. Lateral calices near the summit, X4 178 



Figs, if, id. Lateral calices nearer base of specimen, X4 178 



Plate 79. — Acropora palifera (Lamarck). 



Fig. I. Specimen from Cocos-Keeling Islands 178 



Figs. 2, 3. Variety a (Brook). Specimens, one-lialf natural size, from Murray Island 178 



Figs. 4, 4a, ^b. Variety a (Brook). Three views of same branch from Murray Island. Fig. 4, part of 



surface, X2; fig. 4a, calices near apex of branch, X2; fig. ^b, apical corallite, X2 178 



Plate 80. 



Figs, i, la, lb. Acropora plicata (Brook), from Murray Island. Fig. I, corallum, X1/2; fig. la, part of a 



branch, X2; fig. lb, apical corallite, X2 179 



Figs. 2, 3, 3a, 3*. Acropora variabilis (Klunzinger), from Cocos-Keeling Islands. Fig. 2, a branch, natural 

 size. Figs. 3, 3a, 3^, varietal form. Fig. 3, corallum, about 1/3 natural size (photograph from 

 Dr. Wood Jones); fig. 3a, a branch, natural size; fig. 3*, the same branch, X3 181 



Plate 81. — Acropora polymorpha (Brook), specimens from Fanning Island. 



Figs, i, 2, 3. Views of three coralla, to show variation, each one-half natural size 180 



Figs. 4, 5. Two branches, each X2. The specimens represented by figs, i and 4 closely resemble the 

 specimen labeled Madrcpora abrotanoides by Dana, which was referred to M. polymorpha by 

 Brook 180 



Plate 82. 



Figs, i, la, ib. .Icropora murrayensis, new species, from Murray Island. Fig. I, corallum, natural size; 



fig. la, a branch terminal, X3; fig. li, apical corallites, X3 183 



Figs. 2, 2a, ib. Acropora rosaria (Dana), Dana's type of Madrcpora rosaria. No. 281, U. S. Nat. Mus. 



Fig. 2, corallum, X1/2; fig. 2a, branch terminal, X3; fig. 2i, apical corallite, X8 184 



Plate 83. 

 Figs, i, la, \b, if, \d. Acropora syringodcs (Brook), from Murray Island. Fig. i, corallum, X1/2; figs. la 



and lb, branches, natural size; fig. if, a branch, X3; fig. Ii^, apical corallites, X3 185 



Figs. 2, 2a, zb. Acropora squarrosa (Ehrenberg), from Murray Island. Fig. 2, corallum, X1/2; figs. 2a 



and 2i, two branches, each natural size 184 



Plate 84. 

 Figs. 1, 2. Coniopora tenuidens (Quclch), from Murray Island. Fig. I, deep calices and rather small pali, 



X4; fig. 2, shallow calices and large, thick pali, X4 186 



Figs. 3, 3a. Poriirs .rolida (Forskal). Fig. 3, corallum, about 5/9 natural size (photograph from Dr. Wood 



Jones); fig. 3a, calices, X8 191 



Figs. 4, 4a, 4b, 5. Porites murrayensis, new species. Fig. 4, corallum, natural size; fig. 4a, summit calices, 



X8, pali weakly developed; fig. ^b, calices near the edge, X8, pali well developed. Fig. 5, 



calices of another specimen, X8 192 



Plate 85. 



Figs, i, la, 2, 2a, 3 Porites lobata Dana. Fig. i, corallum, natural size; fig. la, calices, X8, of Dana's 

 type o{ Porites favosa. No. 672, U. S. Nat. Mus. Fig. 2, corallum, natural size; fig. 2a, calices, 

 X8, of Porites lobata forma centralis Vaughan, specimen from Fanning Island. Fig. 3, calices, 

 X8, of another specimen of the same "forma," from Fanning Island 192 



Figs. 4, 4a, 5, 6, 6a. /^or»f.r au-i/ra/ifrr/jV, new species, from Murray Island. Fig. 4, calices, X8, separated 

 by rather wide walls; fig. 4a, calices, X8, separated by narrow walls, ditterent areas on the 

 same specimen, the holotypc of the species. Fig. 5, calices, X8, separated by narrow walls; 

 pali, plate-like. Fig. 6, corallum, natural size; fig. 6a, calices, X8, specimen with smaller 

 calices 194 



