TURRITELLA (HAIJSTATOR) PLANISPIRA. L53 



Specijic Characters. — Shell strong and solid, subulate, turreted; whorls nearly 

 flat, regularly diminishing in size; ornamented by fine spiral striations, generally 

 with a ridge near the suture; spire slender, elongate; suture distinct, sometimes 

 channelled ; base angulated. 



Dimensions. — L. 50 mm. B. 18 mm. 



Distribution. — Not known living. 



Fossil : Waltonian Crag : Little Oakley. Newbournian : Bentley. 



Miocene : France, north Germany, Vienna basin, Italy. 



Lower and Upper Pliocene : Piedmont, Liguria. 



Re marls. — One of the Crag fossils from Oakley figured under this name agrees 

 fairly well with a specimen of T. marginalis which I have received from Touraine, 

 although the identification can hardly be regarded as conclusive, but as I have 

 several others of the same kind it seems desirable to figure with it a verified and 

 perfect specimen of this species for comparison with any future finds. The 

 fossil from Bentley (fig. 10) is more slender, but it closely resembles the one taken 

 as the type by Homes from the Miocene of the Vienna basin (op. cit.). The latter 

 approaches the T. planispira of Wood, but the sculpture is different. 



T. marginalis is recorded from the Miocene deposits of various parts of Europe 

 and by Prof. Sacco from the Upper and Lower Pliocene of northern Italy. It 

 may be derivative in the Crag. 1 



Turritella (Haustator) planispira (S. V. Wood). Plate XLIV, fig. 16. 



1842-72. Turritella planispira, S. V. Wood, Ann. Mag. Nat. Hist. [1], vol. ix, p. 534, 1842 ; Mon. 



Crag Moll., pt. i, p. 76, pi. ix. fig. 11, 1848 ; 1st Suppl., pt. i, p. 54, 1872. 

 1843. Turritella planispira, Nyst, Coq. foss. Terr. tert. Belg., p. 401, pi. xxxviii, fig. 9. 



1871. Turritella subangulata, Jeffreys in Prestwich, Quart. Journ. G-eol. Soc, vol. xxvii, p. 146. 



1872. Turritella planispira, A. and R. Bell, Proc. Geol. Assoc, vol. ii, p. 204. 



1898. Turritella planispira, A. Bell, Trans. Boy. G-eol. Soc. Cornwall, vol. xii, p. 149. 



Specific Characters. — Shell slender, rather small, subulate ; whorls flat or 

 nearly so ; spire forming an elongated cone; suture slight; ornamented by fine 

 angular and equidistant ridges ; base of the shell angulated. 



Dimensions. — -L. 35 mm. B. 10 mm. 



Distribution. — Not known living. 



Fossil: St. Erth (A. Bell). Coralline Crag: Sutton. Walto- 

 nian : Walton-on-Naze, Beaumont, Little Oakley. Newbournian ; Newbourn, 

 Sutton. 



Remarks.— I have a fair number of specimens, more or less imperfect, from 

 Oakley, which seem to be the T. planispira of Wood. They belong to the same 

 group as the larger and more finely sculptured form described above, though with 



1 The figures of T. marginalis given by Brocchi and Sacco have a more distinctly channelled suture 

 than that of Homes. Our Crag shells more nearlv resemble the latter. 



