BELA RUGULATA. 283 



B. rugulata were unfortunately among those that were lost in the post. I have 

 figured a specimen from Boyton together with a Recent shell from the Stockholm 

 Museum, which Dr. Odhner considers typical, for comparison with it. Mr. A. Bell 

 has noticed among some fossils obtained from the Manx drift by the Rev. S. N. 

 Harrison one or two others, imperfect, which may be referred, I think, to this 

 species. 



B. rugulata is not such a decidedly northern form as some of the Belas here 

 described, having been found as far south as the Christiania Fiord, although it has 

 been reported also from Iceland and Greenland. Mr. Friele says it occurs along 

 the entire Norwegian coast as far north as Tromso and Hammerfest in from 

 10 to 197 fathoms. 



Prof. By0gger regards it as a variety of B. nohilis, and Dr. Kobelt of B. 

 turricula, but Prof. G. O. Sars, Mr. Friele, Drs. Nordgaard, Sparre Schneider, 

 Odhner and others, whom I follow, consider it specifically distinct. 



B. rugulata belongs to the same group as B. scalaris and B. nohilis ; the spiral 

 sculpture of the former, however, is different, as is the dentition of the mollusc. 



Var. scalaroides, G. 0. Sars. Plate XXXI, figs. 13, 14. 



1878. Bela scalaroides, G. O. Sars, Moll. Eeg. Arct. Norv., p. 231, pi. xxiii, fig. 7. 



1886. Bela rugiilata, var. scalaroides, Friele, Norske Nordh. Bxped. (MoUusca), vol. ii, p. 5, pi. vii, 

 fig. 7. 



1887. Bela scalaroides, Kobelt, Martini und Chemuitz, Conch. Cab., ed. 2, vol. iv (Pleurotomidse), 

 p. 158, pi. xxxii, fig. 12. 



1893. Pleurotoma scalaroides, A. Bell, Proc. Eoy. Phys. Soc. Edinb., vol. xii, p. 22. 



1905. Bela turricula scalaroides, Kobelt, Icon, sclialentrag. europ. Meeresconch., vol. iii, p. 240, 



pi. Ixxxii, fig. 19. 

 1910. Bela rugulata, var. scalaroides, Odhner, Kongl. Svensk. Vet-Akad. Handl. Stockholm, vol. vii, 



p. 11. 



Varietal Characters. — Shell more slender and elongate than the type; spiral 

 sculpture regular and much finer ; whorls less sharply angulate ; spire longer than 

 the mouth ; mouth narrower ; outer lip but little expanded. 



Dimensions. — L. 15 mm. B. 7 mm. 



Distribution. — Recent : Finmark, Lofoten Islands, North Cape, south of Bear 

 Island, Iceland. 



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

 Iceland Crag. Pleistocene : King Edward. 



Remarks. —This shell was originally regarded by Prof. G. 0. Sars as specifically 

 distinct, but has been since considered b}^ Mr. Friele and Dr. Odhner as a variety 

 of B. rugulata. The latter informs me it may be specially distinguished by its 

 very fine spiral sculpture. I had an identified specimen from Oakley (one of 



