Kim:
 
The name given is Encope grandis (L. Agassiz).  Sorry, I misplaced my
reference, dont think it was Common Intertidal Invertebrates of the Gulf
of California, cause that would have given the year.  If I find the year
I'll let you know.
 
Alan Gettleman
Merritt Island, FL
 
 
 
 
 
Kim C. Hutsell wrote:
>
> Could someone please tell me what the genus and species is for the common
> Mexican Arrowhead sandollar found in the northern Gulf of California?
> (I've misplaced my reference on the subject...just when I need it, of
> course.)
>
> Thanks in advance.
>
> Kim Hutsell