arge purplish spot, scmetimcs occupying a considerable 

 portion of the surface. 



ODSERVATIONS. 



Several fine specimens were sent to me a few years 

 since by Dr. Harris, who obtained them from Dr. Bass of 

 Boston ; they were taken by fishermen in Chaleur's bay, 

 New-Brunswick. Dr. Storer has not yet found it near 

 Boston. 



Mr. T. Peale presented a specimen, which he found on 

 the coast of Maine. According to Dillwyn it has been 

 found on the coast of Scotland, and Banks procured one 

 from the stomach of a cod fish on the banks of Newfound- 

 land. The late Mr. S. Coates of Philadelphia had an in- 

 individual in his collection, which was drawn up on the 

 lead by Capt. Coffin, in fifty-two fathoms water, on the 

 eastern edge of the banks of Newfoundland in latitude 

 45 deg. 40 min. Linne obtained it at West Gothland, 

 and Olafisen in Iceland. 



It varies much in depth of colouring and one in my col- 

 lection has the convex valve dark purplish both within 

 and without, destitute of bands, and the opposite valve is 

 tinted with purplish within on the upper half. Mr. Peale's 

 specimen is more of an uniform dull orange both within 

 and without, and with but little appearance cf bauds. 



REFERENCE TO THE PLATE. 



Fig. 1, Eiterior and a portion ol the interior views. 

 1 a. A small portion of the exterior surface magnified, 

 PI 56. 



