Chesepectin middlesexensis

January 5, 2016

Hi Herb.

Your specimen actually looks more like a Chesapecten madisonius (Say, 1824) rather than a jeffersonius.

(Page 11 of 46 in electronic document, but labeled Page 5 in actual report)

Just thought I would offer.........

January 6, 2016

Hard to say, they all look alike. This one is 6.5 " wide, a little larger than the average C.madisonius ?

Thanks for the info.

January 6, 2016

the square cross-section of the plications makes me think jeffersonius

From the album: