> Vink also > notes that the burryae form has straighter sides. He treats it as a > subspecies of C. floridanus. Seems most specimens from the Keys are > labeled > as this form, but I have seen very few specimens that actually match > the > type in form and pattern. Study of a large enough series of shells > from the > Keys may show this form intergrades with the other forms of this > species. C. f. burryae is a forum of C. floridanus. I have found ones that look like the holotype together with C. floridanus and intergrades. > Other forms you may encounter on labels are C. floridanus tranthami > (a small > pale form from the upper Florida Keys/ Pickles Reef which I would > like to > learn more about.) That is a rare shell and I have never found any. It is supposed to have a different colored animal. Andrew