BELA NOBILIS. 281 



Bela nobilis (Mciller). Plate XXXI, figs. 17—21. 



1842. Defrancia nohilis, Moller, lud. Moll. Groenl., p. 12. 



1878. Bela nohilis, G. 0. Sars, Moll. Reg. Arct. Norv., p. 228, pi. xvi, figs. 19, 20. 



1884. Bela nohilis, Morch and Poulsen, MS. list in Geological Museum, Copenhageu, no. 36 



(unpublished). 

 1886-1901. Bela nohilis, Friele, Norske Nordh. Exped. (Mollusca), pt. ii, p. 5, pi. vii, fig. 8, 1886 ; 



pt. iii, p. 88, 1901 . 

 1887. Bela nohilis, Kobelt, Martini und Chemnitz, Conch. Cab., ed. 2, vol. iv (Pleurotomidse), p. 145, 



pi. xxxi, fig. 10. 

 1890. Bela nohilis, A. Bell, Rep. Brit. Assoc. (Leeds), p. 410. 

 1893. BeJa nohilis, A. Bell, Proc. Roy. Phys. Soc. Ediu., vol. xii, p. 22. 

 1899. Bela nohilis, Posselt, Medd. om Gronl., vol. xxiii, p. 147. 



1901. BeJa nohilis (rugulata), Br^igger, Norges geol. uuders^gelse, vol. xxxi, p. 653, pi. vi, fig. 14. 

 1905. Beta turricula nohilis, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. iii, p. 237, pi. Ixxxii, 



fig. 4. 



1910. Bela nohilis, Odhner, Kougl. Svensk. Vet-Akad. Handl. Stockholm, vol. vii, p. 12. 



1911. Bela nohilis, 0jen, Contr. Quart. Geol. Norw. (Arch. Math. Naturvid., vol. xxxii), p. 4. 



Specific Characters. — Shell solid, ovato-fusiform ; spire turreted, shorter in 

 comparison to the length than in B. scalar is ; apex acute; whorls 7 — 8, squarely 

 angulate, with a flattened shelf below the suture, the last expanded, much the 

 largest, two-thirds the total length; ornamented by 16 — 20 strong and prominent 

 longitudinal ribs, nodulous on the keel, intersected bj fine undulating spiral ridges, 

 the uppermost, stronger than the others, forming a continuous margin to the 

 whorls ; suture less oblique than in B. scalaris ; mouth ovate, about half the length 

 of the shell, distinctly angulated by the keel ; canal wide, truncated. 



Dimensions. — L. 12 — 25 mm. B. 6 — 12 mm. 



Distribution. — Recent : Tromso, Hammerfest, Lofoten Islands, Murman Coast, 

 White Sea, Arctic Siberia, JS^ova Zembla (Leche), Kara Sea, eastern North America ; 

 Behring Strait (Friele), Greenland, Iceland (Odhner). 



Fossil : Coralline Crag : Boyton. Waltonian : Little Oakley. 

 Newbournian : Waldringfield. Butleyan : Butley, Iceland Crag. Isle of Man, 

 Wexford. 



Pleistocene: March gravels (F. W. H.) ; Clava, King Edward (A. Bell); 

 Christiania region — Yoldia-clays, Area-clay, Scrobicularia- and Tapes-banks 

 {Br0gger) ; Trondhjem (0yen) ; Spitzbergen (Knipowitsch). 



Remarks. — This form is usually considered specifically distinct from B. scalaris, 

 to wdiich, however, it is closely allied. As stated above, it may be distinguished 

 from the latter b}^ its less elongate spire, its stronger sculpture, and the more 

 distinct and squarer carination of its whorls. 



Prof. G. 0. Sars has figured two varieties, one of which, smaller and wider in 



36 



