TURBONILLA (PYRGOLTDIUM) INTERNODULA. 573 



nuniber, sometimes nearly straight, at others more or less ol)li([ue, interrupted by 

 the suture, which is generally deep and channelled, the costee being connected 

 by a transverse band of nodules, placed especially on the upper part of the shell 

 and in the centre of each whorl ; spire elongato-conical, regularly diminishing in 

 size to a blunt point ; mouth oval, angulate above, rounded below ; base excavated, 

 without sculpture below the periphery. 



Dimensions. — L. 7 — 12 mm. B. 2 — 3 mm. 



Disfyihiifioii. — Not known living. 



Fossil: Coralline Crag : Sutton, Gedgrave. Waltonian : Walton- 

 on-Naze, Beaumont, Little Oakley. Newbournian : Bentley, Waldringfield, New- 

 bourn, Ramsholt, Felixstowe, Sutton. Butleyan : Butley, Bawdsey, Hollesley. 

 Icenian : Bramerton, Beccles. Middle Glacial : Billockby, Gorleston cliff. 



Casterlien, Scaldisien, Poederlien : Belgium. Scaldisien : Holland. Miocene : 

 Piedmont (var. Ditoaniicii). Lower Pliocene — Piacenziano. 



Upper Pliocene : Astigiano, Monte Mario, Livorno, Altavilla. 



Pleistocene : Monte Pellegrino, Taranto, Livorno, Valle Biaia. 



RpwarJcs. — This form, easily recognised by its spiral band of nodules and 

 known in 1848 from the Red and Coralline Crag only, has since been reported 

 from other East Anglian horizons, especially from one locality at Bramerton, where 

 many years ago it was found, rather abundantly, by Mr. James Reeve, of the 

 Norwich Museum, and myself. It occurs also in the Belgian and Dutch beds 

 (q.v.), in the Pliocene of Italy and Sicily and the Pleistocene of the latter. 

 Prof. Sacco records one variety {miocenica) from the Italian Miocene. It has been 

 doubtfully identified Avith the recent Mediterranean species, Twrhonilla rosea, 

 Monterosato, described below, but Sign. Cerulli-Irelli considers this to be a 

 mistake. 



In one of the specimens here given (fig. 33), Avliich is from the Sedgwick 

 Museum, the costse are unusually numerous, the intervening spaces are narrower 

 and the nodules less conspicuous. 



A'ar. ligata (J. Reeve). Plate XLIX, fig. 35. 



1878. Chemnitzia ligaia, Jas. Reeve, Proc. Norwich Geol. Soc, vol. i, p. 70. 



1879. Chemnitzia inter nodida var. ligata, S. V. Wood, Mou. Crag Moll., •2nd Suppl.,p. 24, pi. ii, fig. 11. 



Vdriefal Characters. — Specially distinguished from the type by a more dis- 

 tinctly marked spiral line in the centre of the Avhorls, connecting the longitudinal 

 costa3. 



DimeiisioDs. — L. 10 mm. B. 3'5 mm. 



Distrlbutwii. — Not reported living. 



Fossil : Icenian Crag : Bramerton. 



75 



