DESCRIPTION OF 



PLATE I. 



PAGE 



Fig. 1. MEGISTOCBINUS LATUS. 480 



1 a. Summit of specimen. 

 1 b. Basal view of the same. 



Fig. 2. SYNBATHOCRINUS MATUTINUS. 483 



2. View of an imperfect specimen. 



Fig. 3. TAXOCRINUS INTERSCAPULARIS. 482 



Fig. 4. PENTREMITES SUBTRUNCATTJS. 485 



Fig. 5. CLADOPORA DICHOTOMA. 478 



Fig. 6. STRIATOPORA RUQOSA. 479 



Fig. 7. ACERVULARIA PROFTJNDA. 477 



7 a. Part of a large hemispheric mass, showing several young cells, some 

 of which are nearly circular : natural size. 



7 b. Transverse section of a cell, enlarged, from a polished surface. The 

 inner wall is not defined, and many of the rays are continuous to the 

 centre of the cup. 



7 c. A portion of a cell, enlarged, showing the denticulated rays. 



Fig. 8. ACERVULARIA DAVIDSONI. 476 



8 c. A weathered fragment of this species. 

 8 b. An enlargement of one of the cells. 



