PLATE 40. 
Fig. 
1 . 
534. 1. Callopora elegantula. 
(Pag. 144.) 
1 a. The base of a specimen, showing numerous diverging stems which are irregularly branched. 
1 b. A continuation of some of the branches of the last specimen, showing an individual of Cladopora mul- 
tipora, attached and growing from the stems of this coral. 
1 c. A fragment showing the circular openings unequally distributed over the surface. 
1 d. A smaller bifurcating branch, having the cells more evenly distributed. 
1 e. A fragment showing the,hollow terminations of the branches. 
1 f. A fragment enlarged where there are no circular apertures on one side, a striated or minutely cellular 
surface alone existing. The transverse section of the stem in the annexed figure 1 /f shows that the 
increase of growth was made mostly on one side, and this side is the one on which the tubular cells 
exist, while that side represented in 1 f has increased very little. 
1 g. A fragment having a tortuous or irregular form, caused by contraction from the obliteration or cica¬ 
trizing of the cell apertures, and consequent cessation of growth.at these points. 
1 g f. Magnified portions from the surface of 1 g. 
1 h. An enlargement at one of those points where the growth has ceased, and the intercellular space appears 
to be solid or simply striated upon the surface. 
1 i. An enlargement of 1 c, showing the irregular distribution of the apertures of the cells. 
1 k. A similar enlargement where the cells are in contact. 
1 l. An enlargement showing the stellate apertures, with another figure 1 l f somewhat more highly mag¬ 
nified than the preceding. 
1 m. An oblique section of a stem enlarged. 
1 n. An enlarged portion of the section of another stem, showing the transverse septa crossing the intercel¬ 
lular spaces, with a single tubular cell crossed by several septa. 
Fig. 
535. 2. Callopora Florida. 
( Pag. 146.) 
2 . 
2 a. An enveloping mass, consisting of several distinct layers, which, at the commencement of growth, at¬ 
tached itself to a branch of C. elegantula. 
2 b. A portion of the surface enlarged, showing the form of the apertures and of the intercellular spades.. 
2 c. A portion of a more perfect specimen, showing the elevated points at the angles of the cells. 
2 d. A section efilarged, showing the tubular structure, its connexion with C. eleganiula, and the surface of 
C. aspera in its connexion with the other two. 
2 c. A fragment giving some appearance of branching in a palmate form. 
2 f. A section showing the septate character of the intercellular spaces. 
Fig. 3. 538. 3. Callopora laminata. (Pag. 146.) 
8 a. The surface showing the openings of the natural size. 
8 b. A section showing its mode of growth in concentric laminae. 
3 c. The lower surface, showing the concentric striated membranous covering. 
3 d. A portion of the surface enlarged, showing the form of the mouths of the cells. 
3 e. A section enlarged, showing the vertical tubular cells and transverse septa. 
Fig. 4. 537. 4. Callopora aspera. (Pag. 147.) 
4 a. A fragment of this species, enclosing in its lower part a crinoidal column, and in the upper being hollow 
and expanding laterally. 
4 6, c. Sections of the two extremities. 4 d, e. The upper extremities of two stems of this coral. 
4 /. A lateral view of the termination of a stem which is apparently solid throughout, but consisting of en¬ 
veloping laminae which ceased to extend in some parts while they were added to parts of the stem 
adjoining. 
4 g. An enlarged portion, showing the apertures Of the cells and the intercellular spaces where the surface 
is partially worn. 
4 h. An enlarged portion where the minute points surrounding the cell are very conspicuous, leaving the. 
cells scarcely visible to the naked eye. 
4 i. A transverse section of a stem enlarged, showing the columnar character and septate interspaces with 
open tubular cells. 
Fig. 5. 538. 5. Callopora nummiformis. ( Pag. 148.) 
5 a. The upper surface of the specimen, natural size. 5 b. A portion magnified. 
Fig. 6 a, b. Callopora, n. s. undescribed. 
