PLATE 2L 
with a few concentric circles, and crossed by parallel, trans- 
verse lines, answering the number * of joints, into which 
the end of the branch was indented. 
Frequently found detached, among other petrifactions. 
FIG. 3, 
A group of Entrochita of ditferent species, in limestone. 
* This varies considerably in different specimens — In fig. 1 , of the present 
plate, each of the cavities occupies a space equal to the length of nine or 
ten joints — In fig. 1, plate 2, the diameter of the cavities does not exceed the 
length of one joint. 
