PLATE 34. 
Fig. 1. 
511. 1. Astrocerium venustum. 
(Pag. 120.) 
1 a. A vertical section of a solid spheroidal mass, showing its columnar character, and the lines indicating 
stages of growth. 
1 b. The base of a smaller solid specimen, showing the coral surrounding, and the columns diverging from 
a stem of the Syringopora multicaulis. 
1 c. A vertical section, with the cells open, showing the internal character. 
1 d. A portion enlarged, showing the arrangement of the spiniform rays between the septa. 
1 e. A similar section where the rays are nearly obsolete. 
1 /. A section enlarged, showing the surface of'the walls of the cell, where the rays are broken off. 
1 g. A single space between two septa, greatly enlarged. 
1 h. A transverse section of the cells parallel to the surface. 
1 i. The same enlarged. 
1 j. Surface of a specimen of this coral where the radiating lamellae are nearly obliterated, and showing a 
columnar structure. 
Fig. 2. 
(Pag. 122.) 
512. 2. Astrocerium parasiticum. 
2 a. A small spheroidal form, attached to a coral which projects beyond the base. 
2 b. A small spheroidal specimen. 
2 c. A spheroidal mass with the cells open on a part of the surface, shbwing the unequal size of the openings; 
the interspaces are also very wide. 
2 d. A smaller mass enclosing a piece of a crinoidal column, which projects on both sides of the coral. 
2 e. Sections of a spherical mass, which enclosed a fragment of an ichthyodorulite. 
2 /. A portion of the surface from a large specimen, where the cells are filled, and the whole mass is columnar. 
2 g. A small portion from the base of the last, showing the weathered surface of the columns. 
2 h. The ends of the tubes enlarged, showing the stellate character. 
2 i. Showing the papillose surface of the interior of the tube when the rays are broken away, leaving the 
bases projecting. 
