SAXICAVA. 79 



inside whitish, with a faint iridescent hue in certain parts : 

 pallia! scar exhibiting about a dozen spots of different sizes : 

 muscular scars deep ; anterior triangular or semioval, posterior 

 elongated. L. 2. B. 3. 



Habitat : The Dogger bank, off the coasts of York- 

 shire, Northumberland, and Durham, deeply imbedded 

 in muddy ground at about 30 f. j and Mr. M' Andrew 

 dredged a valve in 82 f. east of Shetland. It is very 

 difficult to procure, and is consequently scarce. Fossil 

 in most of our newer tertiaries up to the Red Crag : at 

 Chillesford it is found in pairs (Woodward), and at 

 Wick in a fragmentary state in the boulder-clay (Peach) j 

 raised beach at Moel Tryfaen (W. Drury Lowe) ; tole- 

 rably common in the Clyde district; Palermo, in clay 

 (Philippi) ; near Christiania in the older part of the 

 glacial formation at 460 feet, and in the younger or 

 post-glacial group at 60-100 feet above the sea-level 

 (Sars) ; Greenland (Rink) . Recent in Iceland (Steen- 

 strup) ; Finmark, 68° 45' (Blix) ; Drontheim (Spengler) ; 

 Cattegat (Loven) ; Bohuslan (Malm) ; Hellebsek in 

 Zealand (Mus. Copenhagen); White Sea (Lamarck); 

 Coasts of Russian Lapland (Baer and Middendorff) ; Sea 

 of Ochotsk (Middendorff) ; Newfoundland fishing-banks 

 (Gould) ; Labrador (Mighels) ; New England (Stimpson) . 



This is probably the strange shell which Donovan in 

 1802 noticed as having been "fished up between the 

 Dogger bank and the eastern coast of England''; but 

 his knowledge of it appears to have been derived from 

 hearsay, and he mistook Panopea glycimeris for the pre- 

 sent species, The first reliable announcement of its 

 being British was made by Doctor Turton in the ' Zoolo- 

 gical Journal' for 1826 on Mr. Bean's authority, with 

 the addition that a single valve had also been found on 

 Aberlady sands in the south of Scotland. Mr. Bean's 



