BELA EXARATA. 285 



Varietal Characters.— J)i^erii from the type form in its smaller size, in the 

 greater length of the spire which is somewhat longer than the month, and in its 

 more numerous longitudinal ribs ; the apex is obtusely rounded. 



Dimensions. — L. 10 mm. B. 4 mm. 



Distribution.— Recent : Norwegian coast : Sognefiord, Bergen, in 100 fathoms, 

 Molde. Arnanes, Iceland (25 fathoms). 



Fossil : Icenian Crag : Bramerton. 



Remarks. — This variety was known to Mr. Friele from a limited area only, and 

 not further north than Molde, but Dr. Odhner has recently reported it from 

 Iceland. It is interesting to find in the English Crag, not only so many species 

 of Beta now living in northern seas, but also well-marked varieties of them which 

 still exist in those regions. For the identification of the present specimen I am 

 indebted to Dr. Odhner; the Recent Icelandic shell figured Avith it is from the 

 Stockholm Museum. Mr. Friele states that Jeffreys regarded this form as a 

 distinct species. 



Bela exarata (Moller). Plate XXXI, figs. 32, 33. 



1842. Defrancia exarata, MiJller, Ind. Moll. Groenl., p. 12. 



1870. Mangelia exarata, S. V. Wood, jun., and F. W. Harmer, Kep. Brit. Assoc. (Liverpool), p. 90. 



1878. Bela exarata, G. O. Sars, Moll. Reg. Arct. Norv , p. 282, pi. xvi, fig. 18. 



1884. Pleurotoma exarata, Jeffreys in Lamplugh, Quart. Jouru. Geol. Soc, vol. xl, p. 320. 



1886-1901. Bela exarata, Friele, Norske ]S"ordli. Exped. (Mollusca), pt. ii, p. 19, pi. viii, fig. 24, 



1886 ; pt. iii, p. 89, 1901. 

 1887. Bela exarata, Kobelt, Martini und Chemnitz, Conch. Cab., (d. 2, vol. iv (Pleurotomidse), 



p. 140, pi. xxxi, fig. 4. 

 1890. Pleurotoma exarata, A. Bell, Kep. Brit. Assoc. (Leeds), p. 410. 

 1899. Bela exarata, Posselt, Medd. cm GrrouL, vol. xxiii, p. 146. 

 1905. Bela turricula exarata, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. iii, p. 236, pi. 



Ixxxii, fig. 3. 

 1910. Bela exarata, Odhner, Kongl. Svensk. Vet-Akad. Handl. Stockholm, vol. vii, p. 12. 



Specific Characters. — Shell rather small, ovato-fusiform, turreted ; whorls 6, 

 but little convex, angulate above, the last about two-thirds the total length, 

 excavated below, with a narrow and sloping shelf under the suture ; ornamented 

 by numerous longitudinal ribs hardly reaching the canal, equal to the spaces 

 between them, and becoming slightly nodulous on the keel, as well as by raised 

 and wavy spiral ridges, the upper one more or less continuous, the shell having a 

 reticulate appearance ; suture well-marked ; spire short, with a blunt apex, mouth 

 oval, angulated by the keel ; outer lip but little expanded ; columella flexuous. 



Dimensions. — L. 10 mm. B. 4 mm. 



Distribution — Recent : Tromso, Hammerfest, Alten Fiord, near the coast in 10 



