SIPHO GRACILIS. 175 



Pliocene of northern Europe, has been found by Mr, Clement lieid at Lenhani ; 

 there is also a specimen from the Coralline Crag in the Jermyn Street Museum, 

 which by the courtesy of the Director of the Geological Survey is here figured. 



F. lameUo^iis, Philippi (En. Moll. Sic, vol. i, p. 204, ])1. xi, fig. :50), is a 

 different species. Bellardi reported this shell from the Upper Miocene of Italy, 

 but Prof. Sacco says this was a mistake. 



Gcmis SIPHO, Klein, 1753. 



Sipho gracilis (Da Costa). Plate XX, figs. 3, 4. 



1777. Murex corneus, Peiiuant, Brit. Zool., vol. \v, p. 124, pi. Ixxvi, fig. 99. 



1778. Buccinum gracile, Da Costa, Brit. Conch., p. 124, tab. vi, fig. 5. 



1853. Fusus islandicus, Forbes and Hanley, Brit. Moll., vol. iii, p. 416, pi. ciii, fig. 1. 

 1867. Fusus gracilis, Jeffreys, Brit. Conch., vol. iv, p. 335, pi. Ixxxvi, fig. 2. 

 1890. Neptunea gracilis, Carus, Prod. faun. Medit., vol. ii, p. 400. 

 1902. Tritonofusus^ gracilis, Conch. Soc. Gt. Brit., List of Brit. Mar. Moll., p. 15. 

 1912. Sipho gracilis, Dautzeuberg et Fischer, Camp. Scient. Pr. Monaco, vol. xxxvii (Mollusqnes), 

 p. 82, pi. iii, figs. 3—5. 



Specific Characters. — Shell solid, turreted, regularly tapering ; whorls but 

 slightly convex, the last about two-thirds the total length-; ornamented by 

 spiral ridges which extend to the sntnre ; apex twisted, irregularly mammiform 

 but not bulbous; suture slight; mouth oblong, oval, angulate above; canal rather 

 short, open, turning more or less to the left, with an obliquely curved notch; 

 outer lip thin, rounded, not contracted or incurved above ; inner lip forming a 

 glaze upon the pillar ; pillar curved, angulated at the commencement of the canal. 



Dimensions. — L. 75 mm. B. 30 mm. 



Distribution. — Recent: British Seas, rare on the southern coasts; Iceland, Faroe 

 Islands (Morch) ; south-western coasts of Norway (Sars) ; Sweden ; Cattegat ; 

 north-west coasts of France. Mediterranean, Gulf of Lyons (Kobelt). 



Fossil: Coralline Crag: Boyton. Waltonian : Little Oakley. 

 Newbournian. Butleyan. Icenian. Isle of Man. Wexford Gravels. Pleistocene: 

 Bridlington, Kelsey Hill, Moel Tryfaen. Estuary Clays : N.E. Ireland, Belfast, 

 Howth; Dalmuir, Girvan, Lewis. 



Remarhs. — The classification and nomenclature of the various species of Sipho 

 found in the English and Belgian Crag is a matter upon which there is much 

 difference of opinion. Taken by themselves the study of these forms is no easy 



^ The term Tritonofusus is now adopted in place of Sipho bj the Conchological Society and some 

 other authorities. 



