238 



31ESCRIPTITE CATALOGUE 



A. 



Text-fig. 1. — Bouc'ina Hoclidcttcri, Touk. A. Transverse section showing 

 the character of the central ancl the peripheral canals. X -8. 

 B. Cross-section of a specimen vt'iih a central cavity, and showing 

 clearly the clichotomous brnnching of the periplieral canals. X 28. 

 After Steinnianu. 



