BUCCINUM GRCENLANDICUM. 97 



Vav. minima, nov\ Plate VI T, fig. 6. 



Dimensions. — L. 25 mm. B. 15 mm. 



IJistrUmtiou. — Fossil: Waltonian Crag- : Little Oakley. Pleistocene: Norway. 



Bemarhs. — Dr. 0yen has drawn my special attention to several small specimens 

 of Buccinum among my Oakley fossils, one of them being here figured, which he 

 considers intermediate between B. nndafnm, var. csernlea and B. groenlandiciim- 

 He says this variety is extensively represented in the early post-glacial sub-littoral 

 banks and terraces of Norway. It differs from the varieties before descril^ed in 

 size, the sculptm^e is much more delicate, the longitudinal plications more numerous, 

 and the spiral striation regular and exceedingly fine. 



Among the small Buccinums found at Oakley there are also a number, fragile 

 and possibly not fully grown, varying in the convexity of their whorls and the 

 relative proportions of length and breadth, but for the most part approaching 

 the ('seridea type. They are all nearly of the same size, about 20 mm. in length. 



Dr. 0yen informs me that similar shells occur abundantly in the Pleistocene 

 shell-banks of south-east Norway, at Bj/zrrnedalen and Kolbj/arrnsvik, specimens of 

 which he has been kind enough to send me. Comparing them with the Oakley 

 fossils I find them to correspond closely both as to size and form with the different 

 varieties of the latter. 



Dr. 0yen believes that some of these are hybrid, combining the special charac- 

 teristics of the three species, B. nndatum, var. cseridea, B. r/roenlondicmn,, and 7>. 

 finviarckianum. 



Euccinum groenlandicum, Chemnitz. Plate VIII, figs. 4 — 6 ; Plate IX, fig. 10. 



1788. Buccinum groenlandicum, Chemnitz, Conch. Cab., vol. x (Buccinum), p. 182, fig. 1448. 



1858. Buccinum groenlandicum, Kiister, Martini und Chemnitz, Conch. Cab., vol. iii (Buccinum), p. 8, 



pi. iii, figs. 3, 4. ■ 



1870. Buccinum groenlandicum, A. Bell, Ann. Mag. Nat. Hist. [4], vol. vi, p. 215. 

 1878. Buccinum groenlandicum, Gr. O. Sars, Moll. Reg. Arct. Norv., p. 259, pi. xxv, fig. 1. 

 1882-1901. Buccinum groenlandicum, Friele, Norske Nordh. Exped. (MoUusca), vol. i, p. 29, 1882 ; 



vol. iii, p. 99, 1901. 

 1887. Buccinum groenlandicum, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. i, p. 112, pi. xxi, 



figs. 1, 2. 

 1900. Buccinum groenlandicum, Br^gger, Norges geol. unders^gelse, vol. xxxi, p. 654, pi. vii, fig. 1 ; 



pi. X, fig. 5 ; pi. xi, figs. 3, 4. 



Specific Characters. — Shell smaller than the typical B. undatiim, rather thin, 

 ovato-conical ; spire short ; whorls convex, the last much the largest, two-thirds 

 the total length ; suture deep ; mouth irregularly ovate, angulate above, about half 

 the length of the shell ; canal short, wide, and open ; indistinct longitudinal plica- 

 tions on the upper part of the shell which die out on the body- whorl ; surface 

 covered with spiral lines, some rather prominent, with finer ones in the interspaces. 



13 



