> In my opinion, you have a specimen of C. largillierti.  Not a bad
> thing,
> because this species (or form of C. anabathrum Crosse) is harder to
> obtain
> than C. sennottorum.

Bill,

On the subject of questioning whether it is a form of C. anabathrum, I
would say that it is more closely related to C. sennottorum.  If memory
serves correctly, their surfaces are sort of waxy smooth.

The large C. anabathrum on the west coast of Florida and the smaller east
coast C. anabathrum is probably the same species based on what I have
seen from the Florida Keys.  C. burryae is definitely just a form of the
east coast C. anabathrum.  C. anabathrum tranthami seems to be a
legitimate something unlike C. burryae.