SIPHO ISL ANDICUS. 1 87 



pi/i-aiiiidalis, and proljably iXin-ula CohholtVtai. A speciiiieii of 8. Menapise has Ijeeii 

 discovered recently in the Manx beds by the Rev. S. N. Harrison. 



Sipho islandicus (Cliemnitz). Plate XX, figs. 1, 2. 



1780. Fusus islandicus, Chemnitz, Conch. Cab., vol. iv, p. 159, tab. cxli, tigs. 1312-3. 



1867. Fusus islandicus, Jeffreys, Brit. Conch., vol. iv, p. 333, pi. Ixxxvi, fig. 1. 



1878. Sijjho islandicus, G. O. Sars, Moll. Reg. Arct. ISTorv., p. 270, pi. xv, fig. 3. 



1882. Neptunea {Siplio) isJandica, Friele, Norske Nordh. Exped. (MoUusea), pt. i, p. 10, pi. i, figs. 



9—12. 

 1899. Sipho islandicus, Posselt, Medd. om Gronl., vol. xxiii, p. 189. 



1900-01. Sipho islandicus, Br^gger, Norges geol. unders)z(gelse, vol. xxxi, p. .50, pi. ii, fig. 1. 

 1912. Sipho islandicus, Dautzenberg et Fischer, Camp. Seient. Pr. Monaco (Mollusques), vol. xxxvii, 



p. 87, pi. iii, figs. 8, 9. 



Specific Cliavactt'rs. — Shell large, rather thin, elongated, fusiform ; spire 

 acutely tapering, ending in a bulbous and generally prominent point ; whorls 8 or 

 9, convex, covered with flattened spiral ridges, the last whorl occupying three-fifths 

 or more of the total length of the shell, attenuated towards the base ; suture well 

 defined; mouth oval, angulate above; canal generally long, straight, or turning 

 to the left, semi-tubular, ending in a curved notch ; outer lip thin, regularly 

 curved, sometimes contracted above ; inner lip smooth and polished, forming a glaze, 

 which becomes thicker towards the base, lining the inner side of the canal ; pillar 

 slightly curved and bevelled inwards. 



Dimensions. — L. 100 — 110 mm. B. 36 — 40 mm. 



Distribution. — Recpiit : Shetland, Wexford coast, between Galway and the 

 Porcupine Bank, Gulf of Gascony ; Norwegian seas north of Christiansund ; 

 Finmark, Lapland, Faroe Isles, Iceland, Spitzbergen, Nova Zembla, Greenland; 

 Newfoundland (Dautzenberg and Fischer). 



Fossil : Waltonian Crag : Little Oakley (very rare) ; possibly 

 elsewhere in Red Crag. Isle of Man (Kermode). 



Pleistocene : Norway. 



Remarhs. — This form has been confounded by some conchologists with 8. 

 (/racills, but is now generally considered specifically distinct. I have one large 

 fragment from Oakley, which seems to be of the true 8. Islandicus. It corresponds in 

 sculpture, fragility, and as far as it goes inform, with some Recent specimens I have 

 received from Prof. Nordgaard. Dr. 0yen, when examining my collection, had no 

 hesitation in confirming my identification. With my Oakley fossil I figure a 

 Recent example from Vardo. 



Jeffreys states {op. cit., p. 835) that the Tvltonium islandicwm, of Loven is Fnsus 

 [Troschelia) herniciensis. 



