ODOSTOMIA. 163 



forming a thin film on the upper slope of the piUar, slightly 

 reflected and nearly straight below : imihiliciis none, except a 

 slight depression of the base in adult specimens : tooth very 

 retired, slight, and indistinct, formed on the pillar near its 

 junction with the upper slope of the base : operculum as in the 

 last species. L. 0-35. B. 0-1. 



Yar. fulvocincta. Body whitish : snout long and bilobed : 

 tentacles leaf- like, rather short and broad, set well apart : eyes 

 small, sessile on the inner bases of the tentacles : foot squarish 

 in front, with small angular corners, and pointed behind. 

 Shell more slender than the typical form, with a narrower 

 base, and of a thinner texture : colour whitish, the band being 

 always present and more conspicuous : ivhorls not so much 

 compressed. Turritella fulvocincta, Thompson in Ann. & Mag. 

 N. H. V. p. 98. Chemnitzia fulvocincta, F. & H. app. p. 276, 

 pi. xciii. f. 3, and (animal) pi. PE. f. 4, as 0. rufa. 



Habitat : Coasts of Cornwall^, Devon^ and Dorset, in 

 trawl-refuse and at comparatively small depths ; Lang- 

 land and Oxwich Bays near Swansea, in 15 f., and Fish- 

 guard in 8 f. (J. G. J.) ; Tenby (Lyons) ; Anglesea 

 (M^ Andrew) . A local or rare species. Coralline Crag at 

 Sutton, according to S. Wood; but his specimens appear 

 to belong to a different and probably an extinct species. 

 It has an extensive range southward, along the Atlantic 

 coasts of France, Spain, Portugal, Madeira, and the 

 Canary Isles, and also throughout the Mediterranean 

 and Adriatic, at depths of from 8 to 30 f. The variety 

 occurs on our northern, Scotch, and Shetland coasts, 

 from the Dogger bank to Unst, at various depths from 

 80 to 90 f., and in the north, east, and south of Ireland. 

 Sars has recorded it as fossil from a post-glacial shell- 

 bank at Skien, 70-80 feet above the sea; he and many 

 other Scandinavian naturalists have enumerated the 

 same variety as living in Sweden and Norway, at depths 

 of from 20 to 60 f. 



My largest specimen, which is from Exmouth, mea- 

 sures half an inch in length ; and a fragment of another 



