PLATE 38. 
Fig. 1. 524. 1. Cladopora seriata. (Pag. 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 where 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 A. 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 k. A figure of a branch, upon the outer margin of a group of parallel stems. 
1 l, ra. Small separate stems showing modes of branching. 
Fig. 2. 525. 2. Cladopora cespitosa. ( Pag. 138.) 
2 a. A view of this species from the base : the upper part of the branches are imbedded in limestone. 
2 b. A part of a stem enlai-ged, showing the openings on the surface. 
2 c. A longitudinal section, showing the arrangement of the cells. 
Fig. 3. 526. 3. Cladopora cervicornis. (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 6. An enlarged portion, showing the weathered openings 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. 
