GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 511 



Plate 85. 



Orbicella limbata (Duncan). 



Pageu 

 Figs. 1, la. Two views of an original specimen of Duncan's Plcsiastraea ramea. 



1. Corallum, natural size 376 



la. Calices, X3 376 



2, 2a, 2b. Three views of the same specimen in the Museum of Compar- 



ative Zoology. 



2. Longitudinal section, natural size 377 



2a. Longitudinal section, X5 377 



2b. Calices, X3 377 



3, Calices, X3, of another specimen 377 



4, 4a. Two views of one of the original specimens referred to by Duncan 



as Phyllocoenia sculpla var. tegula. 



4. Surface of corallum, natural size 377 



4a. Calices, X3 377 



Plate 86. 



Figs. 1, la. Stylangia panamensis, new species. 



1. Corallum, natural size 410 



la. Costse, X4 410 



2, 3, 4, 5. Orbicella imperatoris, new species. 



2. Calices of a cotype, X3£ 378 



3. Calices of a second cotype, X3J 378 



4. Longitudinal section of the corallites of a cotype, natural size 378 



5. Calices of a specimen from Cienaga, Cuba, X3J 378 



6, 6a. Septastrea matsoni, new species. 



6. Corallum, natural size 411 



6a. Calices, X4. 411 



Plate 87. 



Orbicella cavernosa (Linnaeus). 



Four views of the same specimen. 

 Figs. 1. Calices of one end, natural size. Corallites protuberant; costae low, 



thick, equal or subequal 381 



la. Calices of the other end, natural size. Corallites low; last cycle of 



costae very small or obsolete, costae of lower cycles tall and thin. 382 



16. Longitudinal section of corallite, X2 381 



lc. Exothecal cells, X2 381 



Plate 88. 

 Orbicella cavernosa (Linnaeus). 



Fig. 1. Marginal calices, natural size, of a specimen from 9 miles northwest of 



Key West, Florida 380 



2. Calices natural size of a specimen from Tortugas, Florida 380 



3, 3a, 3b. Three views of the specimen labeled Orbicella compacta Rathbun, 

 from Brazil (lat. 12° 48' S. ; long. 38° W.). This is probably a 

 valid variety of 0. cavernosa. 



3. Upper surface of corallum, natural size 384 



3a. A group of calices, X2 384 



3b. Longitudinal section of corallites, X2 384 



