356 TEREBRATULIDiE. 



perforate valve is seen an ovarium of an oblong shape and 

 brilliant vermilion colour, and extending beyond these 

 ovaria in radiating fashion, are the yellowish glandular 

 masses of the liver. 



This interesting mollusk was first added to the British 

 Fauna by Dr. Fleming, to whom, indeed, we are indebted 

 as the first naturalist who noticed our indigenous Brachio- 

 poda. He found it at Ullapool, in Loch Broom. It was 

 afterwards found by the Rev. J. Berkeley at Oban. In 

 each case a single specimen only was taken. Latterly it 

 has been taken in many localities, in from ten to fifty 

 fathoms, on the west coast of Scotland, especially by Mr. 

 Jeffreys, Mr. M'Andrew, and Mr. Barlee. The following 

 habitats will show its range in depth : Loch Fyne, in from 

 fifty to thirty fathoms, plentiful ; off Lisrnore, near Oban, 

 in from twenty to thirty fathoms, plentiful ; abundant in 

 eighteen fathoms off Armadale, in the Sound of Skye. 

 In twenty to ninety fathoms off Mull ; in thirty fathoms 

 off Raza. On the Lingbank, forty miles west of Zetland, 

 in fifty fathoms ; and in forty fathoms off Fitful Head 

 (M'Andrew and E. F.). A single specimen from the 

 north of Ireland is contained in the Ordnance Survey 

 Collections (W. Thompson). Bantry Bay (Dr. Arm- 

 strong). It lives attached to stones and shells ; some- 

 times, as Mr. Jeffreys observes, to sea-weeds. 



This species ranges throughout the European seas, but 

 south of Britain it appears to occur only at considerable 

 depths. It extends its range to the Arctic seas, and is 

 very nearly allied to the T. septentrionalis of the coasts 

 of the United States. 



As a fossil, it is found in tertiary strata, and if the 

 cretaceous T. striatula be identical with it, is one of the 

 most ancient of existing animals. 



