PLATE 38. 



Fig. 1. 524. 1. Cladopora seriata. (P^g- 137.) 



1 a. A small group of the parallel stems of this coral, closely arranged. 



1 6. A similar group in limestone, where the stems are less closely arranged. 



1 c. An enlarged stem, showing the form and character of the cells. 



1 d. A portion of the surface, showing the apertures whore the .stem is worn. 



1 e. A vertical section of several stems, where the cells are open. 



1 /. A single one enlarged. 1 g. The ends of several cells where the tubes are open. 



1 h. A single one enlarged, showing a transverse section of the tubes, the inner or nearest the axis being 



smaller than the outer ones, indicating the increase in size towards the surface. 

 1 i. A polished specimen of limestone, showing the solid ends of the stems of this coral. 

 1 fc. A figure of a branch, upon the outer margin of a group of parallel stems. 



1 /, m. Small separate stems showing modes of branching. 



Fig. 2. 525. 2. Cladopora cespitosa. ( P^g- 138.) 



2 a. A view of this species from the base : the upper part of the branches are imbedded in limestone. 

 2 6. A part of a stem enlarged, showing the openings on the surface. 



2 c. A longitudinal section, showing the arrangement of the cells. 



Fig. 3. 526. 3. Cladopora cervicoknis. (Pag. 139.) 



3 a. A fragment of a branch of the natural size. 



3 6. A portion enlarged, showing more distinctly the form of the apertures. 



Fig. 4, 5, 527. 4. Cladopora fibrosa. ( Pag. 139.) 



4 a. A small branch, showing a tendency to regular bifurcation in its mode of growth. 



4 b. An enlarged portion, showing the weathered opening.s and the fibrous prismatic structure of the longi- 



tudinal section. 



5 a. A large branch, which is solid, and worn so as to show the prismatic structure. 



5 6. A portion enlarged, showing a structure and arrangement analogous to the preceding figure 4 6. 



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