You know, I am glad you asked that. I got a boa recently, and am still hard-pressed to find out whether it's bcc or bci. You know why? (caution: I am about to gripe...) Every time I search Google or even look in books to differentiate the two, they always both look the same. Some have the "cross" on the head, while others have just a stripe down the head. (like mine.) I wonder if anyone really knows the answer! Seriously, someone, please enlighten us.
jonah, sorry if you saw that someone had replied, and you had false notions that this someone knew what she was talking about.