CHITON. 417 



living example at Cullercoats (A.Hancock); disunited 

 valves on Whitley Sands (Fryer) ; rare on the Black 

 Rocks, Leith, Frith of Forth (Knapp) ; Gair Loch and 

 Firth of Clyde (Smith) ; Skye at low-water, and else- 

 where in the Hebrides (E. F.) ; plentiful in seven fathoms 

 at Lerwick, Zetland (E. F.) ; " rare, but found on the 

 north, east, and west coasts of Ireland C in fourteen 

 fathoms Strangford Loch (W. Thompson). 



It ranges throughout the Scandinavian and Arctic Seas, 

 and along the coasts of Boreal America."' 5 ' 



* In Tin-ton's " Conchological Dictionary of the British Islands," (p. 34,) a 

 Chiton punctatus is thus described : " Shell with eight valves, raised, beaked, and 

 margined, very convex, deep red, finely and distinctly punctured all over." To 

 this brief and most imperfect diagnosis is added the remark, that these punctures 

 seem the- sole distinguishing feature between it and Icevis, and that it is a quarter 

 of an inch long. The very rude delineation (fig. 10) which accompanies the 

 text, bears some slight resemblance to marmoreus ; the language is more applicable 

 to an eroded Icevis. The specimen itself, found by Mr. 0. Kelly at Portmarnock, 

 in Ireland, will probably be transmitted to us before the conclusion of the 

 " British Mollusca." 



'3 ii 



