PLATE 40. 



Fig. 1. 534. 1. Callopora elegantula. ( P^g- 144.) 



1 a. Th3 base of a specimen, showing numerous diverging stems wliich are irregularly Ijranched. 



1 6. A continuation of some of tlie liranclies of tlie last s|)ecimcn, showing an individual of Cludopora mul- 

 tipara, attached and growing from the stems of tliis coral. 



1 c. A tVagoient 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 /. 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 atmexcd figure l/f shows tliat 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 ] / has increased very little. 



1 g. A fragment having a tortuous or irregular form, caused by cmitraction from the obliteration or cica- 

 trizing of the cell apertures, and consequent cessation of grov^th at these points. 



1 g t- 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 fc. A similar enlargement where the cells are in contact. 



1 /. An enlargement showing the stellate apertures, with another figure 1 I 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. 2. 535. 2. Callopora Florida. ( Pag. 146.) 



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 spaces. 

 2 c. A jjortion of a more pt-rfect specimen, showing the elevated points at the angles of the cells. 

 2 rf. A section enlarged, sliowing the tubular structure, its connexion with C. elegantula, and the surface of 



C . asfiera in its connexion with the other two. 

 2 e. A fragment giving some aj)iiearance of blanching in a palmate form. 



2 /. 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. 



3 6. A section showing its mode of growth in concentric laminte. 



8 c. The lower surface, showing the concentric striated membranous covering. 



8 d. A portion of the surface enlarged, showing the form of the mouths of the cells. 



3 c. A section enlarged, showing tlie vertical tubular cells and transverse septa. 



Fig. 4. 537. 4. Callopora aspera. (Pag- 147.) 



4 a. A fragment of tliis species, enclosing in its lower part a crinoidal column, and in the upper being hollow 



and expanding laterally. 

 4 6, c. Sections of tlie two extremities. 4 rf, c. 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- 



velo])ing laminse 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 coll 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 nubibiiformis. ( P^g- 148.) 



5 a. The upper surface of the specimen, natural size. 5 6. A portion magnified. 



Fig. 6 a, b. Callopora, n. s. undescribed. 



