CHITON. 47 
Douglas Pier, on stones in 20 fathoms. I have only taken 
one or. two specimens of this shell at each of the above 
localities. Asa littoral species I have found it below stones 
at low tide on the Ascog shore, and Mr. Norman reports it 
at low water at Balloch Bay and the Allans rocks, Cumbrae; 
also at Lamlash, Arran. 
British distribution —Generally distributed on all our 
coasts, but seldom plentiful. 
Foreign localities—Norway (Lovén, and others), Spain, 
Morocco, and Canaries (I/‘Andrew), the Mediterranean and 
Aigean Seas (Forbes, and others). 
* Chiton cinereus, Linné. 
Chiton asellus, Chemnitz. 
Habitat—From 10 fathoms downward, on stones and 
shells, especially on old bivalve shells. Very common on 
all suitable ground throughout the district. The variety 
Rissoi, which seems to depend only on its colour (uniform 
pale yellowish), is not uncommon. 
British distribution.—Abundant everywhere below the 
Laminarian zone. 
Foreign localities—Throughout northern and western 
Europe, from Iceland (Yorell) to northern Spain (MAn- 
drew), and throughout the Mediterranean and Aigean Seas 
(Forbes, and others): these last are, however, somewhat 
doubtful. In America it occurs from Greenland (Fabricius) 
to Massachusetts (Gould, ed. Binney). 
Chiton marginatus, Pennant. 
Chiton cinereus, Laskey (not Linné), Chiton fuscatus, 
Brown. 
Habitat—On stony beaches from half-tide downward, 
exceedingly common throughout the whole district. I have 
not met with it in a lower zone than low water of spring 
tides. 
British distribution—Evyerywhere on stones between 
tide-marks. Very common. 
Foreign localities—Northern and western Europe, from 
Norway (Sa7s, and others) to Mogador (Andrew), as well 
as in the Mediterranean and Adriatic Seas. 
* Chiton ruber, Linné. 
Chiton lzevis (of Pennant), Lovén. 
Habitat—On stones and dead shells in 10 to 20 fathoms 
