BUCCINUM UNDATUM. 98 



British seas. Specimens of the former are often fragile and sometimes 

 decorticated. 



Var. littoralis, King. Plate VI, figs. 9, 10. 



1846. Buccinum undatiim, var. Uttoralis, King, Ann. Mag. Nat. Hist., vol. xviii, p. 250. 



1877. Buccinum unclattim, var. littoralis, Jeffreys, Brit. Conch., vol. iv, p. 286. 



1878. Buccinum undatum, var. littoralis, Gr. O. Sars, Moll. Eeg. Arct. Norv., p. 255, pi. xiii, fig. 12. 

 1912. Buccinum undatum, var. littoralis, Dautzenberg et FiscLer, Camp. Scicnt. Pr. Monaco, vol. 



xxxvii (Mollusques), p. 109, pi. v, fig. 1. 



Varietal Gharaciers. — Shell ovate, thick and solid, ventricose ; spire very short ; 

 l)ody-whorl inflated, larger in proportion than in the type form ; longitudinal 

 plications flexuons, strong; spiral costge coarse, undulating; mouth oval; canal 

 very short; 



Dimensions. — L. 40 — GO mm. B. 28- — 36 mm. 



Distribution. — Recent: British seas to Denmark and the north of Norway; 

 eastern coasts of Northern America. 



Fossil : Waltonian Crag : Beaumont, Little Oakley. New- 

 bournian : Waldringfield. Butleyan : Butley. Probably at other localities in the 

 Red Crag. 



Remarhs. — I have found a number of imperfect specimens of this variety at 

 Oakley, one of them being here figured, together with a Recent shell from Denmark 

 kindly sent to me by Dr. Nordmann, with which my fossils correspond more or less 

 closely. 



Var. flexuosa, Jeffreys. Plate VI, fig. 5. 



1867. Buccinum undatum., yM\ flexuosa, Jeffreys, Brit. Concb., vol. iv, p. 286. 



1912. Buccinum und^itum, var. flexuosa, Dautzenberg et Fisclier, Camp. Scient. Pr. Monaco, vol. 

 xxxvii (Mollusques), p. 110, pi. v, fig. 6. 



Dimensions. — L. 65 mm. B. 35 mm. 



Distribution. — Recent: Hebrides, Orkneys, Shetland; Karlso (Dautzenberg). 

 Fossil: Newbournian Crag: Waldringfield. 



Remarks. — The fossil from the Ipswich Museum here figured differs from the 

 prevalent varieties of the Crag Buccinums in its coarser sculpture and obliquely 

 curved ribs, corresponding with the specimen given by MM. Dautzenberg and 

 Fischer. Jeffreys says the variety flexuosa is more slender than the type, and has 

 an elongated spire. 



