PLATE 30, 31. 
Fig. 3. Exhibits this fossil in a mass of limestone. 
We have met with more perfect specimens than that now 
represented ; but have chosen it for our drawing, on ac- 
count of ite holding, in a small cavity, a beautiful group of 
pyramidal quartz crystals, which, as not being very com- 
mon in our Derbyshire limestones, we thought in some 
degree worthy of notice. The specimen also contains an 
Aiwmia between the branches of one of the stems~A situ- 
ation the shell probably occupied, when both it and the 
coral were in a recent state *. 
The lower part of the specimen is broken, and shows the 
internal structure of the stlrps. 
* “ The living Anomi® have all been found lurking in the nooks between 
the branchings of corals, or cavities of rocks.” Da Costa’s Elements of 
Conch, p. 253. 
