516 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Page. 



Figs. 2, 2a. Two views of a cotype in which the septa are subequal in promi- 

 nence around the calices. 



2. General view of the corallum, natural size 430 



2a. Calices and septocostae, X4 430 



3, 3a. Two views of a specimen intermediate in its septal and septo-costal 



characters between the preceding specimens. 



3. View, natural size 431 



3a. Calices and septo-costae, X4 431 



Plate 111. 



Pironastraea anguillensis, new species. 



Figs. 1, la, 16. Three views of the holotype. 



1. Part of upper surface, natural size 433 



la. Part of lower surface, natural size 433 



16. Valleys and collines, X5 : 433 



Plate 112. 



Figs. 1, la. Pironastraea anguillensis, new species. Two views of paratype. 



1. Part of upper surface, natural size 433 



la. Valleys and collines, X5 433 



2, 2a. Pironastraea antiguensis, new species. Two views of the holotype, 

 from Antigua. 



2. Upper surface, natural size 434 



2a. Part of upper surface, X5 434 



Plate 113. 

 Pironastraea antiguensis, new species. 



Figs. 1, la. Two views of a specimen from near Guantanamo, Cuba. 



1. Part of upper surface, natural size 434 



la. Part of upper surface, X5 434 



Plate 114. 



Figs. 1. Siderastrea radians (Pallas). Calices, X 6, of a specimen from off Cocoa- 

 nut Point, Andros Island, Bahamas 439 



2, 3. Siderastrea siderea (Ellis and Solander). 



2. Calices, X6, of a specimen from Guanica Centrale, Porto Rico 444 



3. Calices, X6, of another specimen, the usual form of the species, also 



from Guanica Centrale, Porto Rico 444 



4, 4a. Siderastrea siderea var. dominicensis, new variety. Two views of 

 the type. 



4. Corallum, natural size 447 



4a. Calices, X6 447 



Plate 115. 



Figs. 1, la. Siderastrea pourtalesi, new species. Two views of the type. 



1. Corallum, natural size 440 



la. Calices, X 6 440 



2, 2a, 26. Siderastrea stellata Verrill. Three views of the same specimen. 



2. Corallum, one-half natural size 440 



2a. Part of surface above the lower edge, X 2 440 



26. Summit calices, X 6 440 



