182 PLIOCENE MOLLUSCA. 



Var. Frielei, nov. Plate XXIT, figs. 3, 4. 



1882. Neptunea (Sipho) curia, var., Friele, Norske Nordh. Exped. (MoUusca), pt. i, p. 15, pi. ii, fig. 4. 



Dimensions. — L. 45 ram. B. 18 mm. 



Disfrihufion. — Eecent : Arctic Ocean between North Cape and Bear Island 

 (Station 323, Friele). 



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

 field. 



Bemarhs. — In its prominent and clearly cut sculpture the AYaldringfield shell 

 here figured resembles the typical f>. togatns. In form it approaches the variety 

 sinuosa of Prof. Br^gger, but it is hardly identical with it. Prof. Br^gger's shell, 

 moreover, is considerably larger. 



Through the kindness of Mr. Friele I am able to figure a specimen dredged 

 between the North Cape and Bear Island in 223 fathoms Avhich seems the counter- 

 part of our fossil. This form, however, he includes with others in his cnrtus group. 

 It is an interesting and important fact that these different varieties of S. togatns 

 were denizens of the North Sea in Pliocene times, and are still found living, 

 apparently unchanged, in circumpolar regions at the present day. 



Var. brevispira, Br0gger. Plate XXII, fig. 7. 



1900-01. Sipho brevispira, Br0gger, Norges geol. uuders0gelse, vol. xxxi, p. 49, pi. iii, fig. 4. 

 1913. SlpJio brevispira, Nordgaard, in Bjorlykke, Norges geol. ucders0gelse, vol. Ixv, p. 225. 



Dimensions. — L. 43 mm. B. 22 mm. 



Distribution. — Not known living. 



Fossil : Waltonian Crag : Little Oakley. 



Pleistocene : Cbristiania region. 



Remarks. — The fossil here given appears to correspond with Prof. Br^gger's 

 figure of S. brevispira except that the canal turns slightly to the left, whereas in 

 the latter it is nearly straight. This, however, is a feature which in our Crag 

 shells is subject to variation. S. breri^inra is regarded by Prof. Br/2rgger as 

 specifically distinct, in which opinion he has been foUoAved by Dr. Nordmann, but 

 I understand some other Norwegian authorities consider it a variety of S. togatus, 

 to which it seems nearly allied. It is very rare in the Crag, and apparently in the 

 Norwegian Pleistocene. Although differing from the type I venture to regard it 

 as a varietal form of the latter species. 



