TEREBRATULA. 349 



has likewise procured it from the Berwickshire coast 

 attached to the lines of the Caldingham fishermen (Ber- 

 wickshire Nat. Cluh. vol. i. p. 213). In an interleaved 

 copy of Laskey's " Catalogue of North British Testacea, 11 

 which we possess, and which formerly belonged to Laskey 

 himself, is this MSS. entry, " Terebratula Psittacea : the 

 under valve was found by me on the shore at Aberlady 

 Bay at low water, and since, a perfect specimen (has 

 been taken) by dredging in the deeps, Frith of Forth, 

 20th July, 1825." The reputed South of England and 

 Dublin Bay specimens are more questionable ; indeed, 

 there is every reason to suppose that they were exotic. 

 Mr. R. A. C. Austen informs us that specimens have 

 been sold in the south of Devon as British by fishermen 

 employed in the Newfoundland fishery, and who, on in- 

 quiry, proved to have brought them from the banks of 

 Newfoundland. 



This shell lives more plentifully in the seas of Boreal 

 America, Greenland, and Norway, and is found fossil, 

 though rarely in pleistocene beds on both sides of the 

 Atlantic. 



TEREBRATULA. Brugiere. 



Shell inequivalve, equilateral, regular, tumid or de- 

 pressed, smooth, grooved, ribbed, or marked with radiating 

 striae, always punctated. Upper valve with its beak 

 perforated ; perforation entire, and separated from the 

 hinge by a deltidium or area more or less developed, 

 or incomplete and bounded by nearly obsolete deltidia. 

 Hinge of two lateral teeth entering the upper valve. 

 Apophysary system composed of more or less complicated 

 looped cartilaginous or calcareous processes, free except at 



