BERTNGIUS TIJRTONT. 155 



1853. Fiisu.<i Tiu-toni, Forbes ami Hauley, Brit. Moll., vol. iii, p. 431, pi. cv, fig. -i ; pi. cvi, figs. 2, 3. 



1867. Fum:^ Turtoni, Jeffreys, Brit. Couch., vol. iv, p. 331, pi. lxx.\v, fig. 4. 



1878. Chrysodomus Turtoni, G-. O. Sars, Moll. Reg. Aict. Norv., p. 269, pi. xiv, fig. 3; pi. xxv, 



figs. 9, 10. 

 1882. Jumala Turtoni, Priele, Norske Nordh. Exped. (Mollusca), vol. i, p. 6, pi. iv, figs. 4—7. 

 1887. Neptunea Turtoni, Kobelt, Icou. schalentrag. europ. Meerescoucli., vol. i, p. 6S, pi. xii, fig. 1 ; 



pi. xiii, fig. 1. 

 1893. JJklco Turtoni, Norman, Aim. Mag. Nat. Hist. [6], vol. xii, pp. 344, 352, pl.-xvi, figs. 1, 2. 

 1901. TJlcho Turtoni, Friele, Norske Nordh. Exped. (Mollusca), vol. iii, p. 101. 

 1912. Juniata Turtoni, Dautzeiiberg et Fischer, Camp. Scieut. Pr. Momico, vol. xxxvii (MoUusques), 



p. 62, pi. i, fig. 4. 



Distribution. — Recent: Great Britain: northeast coast, Do2f2,'er Ijank ; Nor- 

 wegian coast, Finmark, Bear Island, Murman coast. Kola, Greenland, Newfound- 

 land. 



Fossil: Waltonian Crag: Little Oakley. Newbournian : Wal- 

 dringfield, Ramsliolt, Newbourn. Butlejan : Butley. 



Bemarhs. — One or two full-grown examples of this species were obtained 

 previous to 1872 by the late Robert Bell and the Rev. H. Canham from Waldring- 

 field and Butley, but since then it has not been met with in the Crag until the 

 recent discovery at Newbourn of a young specimen (PI. XV, fig. 3) by Mr. Ogden, 

 There are several others, similarly immature and corresponding with it, in the 

 Holmes collection of British shells at the Norwich Castle Museum. The specimen 

 figured by Howse {op. cit.) is of the same character. 



The generic name of this shell has been often changed ; I folloAV the Concho- 

 logical Society of Great Britain in adopting for it Dr. Ball's name of Beringius. 



Var. minor, nov. Plate XVIII, figs. 3, 4. 



Bemayks. — In his paper on the Trondhjem fiord (oj). cit.) Canon Norman des- 

 cribed several varieties of B. Tartoni differing principally in the comparative length 

 of the spire, but all more or less of the normal size of this species. In the Holmes 

 collection, alluded to above, there are a number of others, probably from the 

 Dogger Bank, apparently full grown but smaller and more slender, measuring from 

 45 to 65 mm. in length, and I have two interesting specimens from Oakley (here 

 figured) corresponding with them in form and sculpture, which are respectively but 

 26 and 37 mm. long. The upper whorls of the latter are not swollen as in the 

 type, and the spire is not so elongate, diminishing regularly in size and ending in 

 an abi'upt and twisted apex. 



They appear to represent a dwarfed variety or the arrested development dis- 

 cussed before (p. 79), which we meet with not infrequently in studying the Crag 

 mollusca ; I have, for example, a fair number of specimens of N. clespecta from 

 Oakley having 5 to 6 whorls, and but 25 to 30 mm. only in length, evidently 



