280 PLIOCENE MOLLUSCA. 



one or anotlicr of the Scandinavian authorities mentioned on p. 2 of the first part 

 of this Memoir, to whom I again offer my thanks for their assistance. For the 

 loan of the Recent shells figured with them I am indebted to the kindness of Prof. 

 Lonnberg and Dr. Odhner, of the Zoological Museum at Stockholm. 



Var. ecarinata, G. 0. Sars. Plate XXXI, figs. 6—8. 



1878. Bela scalaris, var. ecarinata, G. O. Sars, Moll. Reg. Arct. N^orv., p. 229, tab. xvi, fig. 9. 



1886. Bela scalaris, var. ecarinata, Friele, Norslce Nordb. Exped, (Mollusca), pt. ii, p. 6, pi. vii, fig. 9. 



1893. Pleurotoma scalaris, var. ecarinata, A. Bell, Proc. Eoy. Pbys. Soc. Ediu., vol. xii, p. 22. 



Varietal Cluiradevs. — Smaller and more slender than the type, with finer 

 sculpture and more numerous costfe ; the upper part of the whorls is rounded or 

 but slisrhtlv carinate. 



Dimevsloiis. — L. 10 — 15 mm. B. 4 — 6 mm. 



Distribution. — Recent: northern Seas, west Finmark. 



Fossil : Waltonian Crag : Little Oakley. Butleyan : Butley. 



Pleistocene : King Edward (A. Bell). 



Bevuu'Jcs.—Trof. Sars says this variety is easily distinguished from the type by 

 its less solid character, narrower form, and its regularly convex and non-carinate 

 whorls. In one of the specimens from Stockholm here figured, which has been 

 identified by Dr. Odhner, the carination is not wholly obsolete. 



Var. abyssicola, Friele. Plate XXXI, figs. 9, 10. 



1886. Bela scalaris, var. abyssicola, Friele, Norske Nordb. Exped. (Mollusca), pt. ii, p. 6, pi. vii, 



figs. 12, 13; pi. ix, fig. 21. 

 1893. Pleurotoma scalaris, var. abyssicola, A. Bell, Proc. Roy. Pbys. Soc. Edin., vol. xii, p. 22. 

 1905. Bela turricula scalaris, var. abyssicola, Kobelt, Icon, schalentrag. europ. Meeresconcb., vol. iii, 



p. 240, pi. Ixxxii, figs. 17—18. 



Varietal Characters. — This form differs from the type, as does the variety 

 ecarinata, in its finer sculpture. Judging from a Recent specimen, however, figured 

 with that from the Crag, and the figures of the authorities before quoted, the variety 

 abyssicola is less slender and more distinctly keeled than the last-named variety. 



Dimensions. — L. 12 — 18 mm. B. 5 — 8 mm. 



Distribution. — Recent: north-western coasts of Norway to Bear Island (Friele), 

 Greenland (Moller), New England coast (Verrill), Kara Sea (Leche). 



Fossil : Newbournian Crag : Sutton. Butleyan : Butley. 



Pleistocene : King Edward (A. Bell). 



Remarks. — The Recent specimen here figured, with which the Crag fossil has 

 been identified, is from the Stockholm Museum. 



