PYRGULINA SCALARIS. 577 



Dimensions. — L. 2 mm. B. 1 mm. 



Distrilmtion. — Bcceiif .- British seas, generally diffused. Lofoten Islands, 

 Norwegian and French Coasts, Canary Islands, Mediterranean as far east as Tunis, 

 Adriatic. 



Fossil : St. Erth. Coralline Crag : Sutton. Irish estuarine clays. 

 Pliocene : Altavilla. Pleistocene : Sicily, Calabria, Tuscany. Topes-haukH : 

 Christiania (Brjgfgger), Trondhjem (0yen). 



BeDiarhs. — The specimens figured under this name, including the var. 

 terehellum, have been identified by M. Dautzenberg as belonging to the present 

 species. As a British fossil it was reported from St. Erth by Messrs. Kendall 

 and Bell, as OcJostoviia pupa from the Coralline Crag of Sutton by S. V. Wood in 

 1848, and more recently by A. Bell from the estuarine clays of Belfast. 

 Originally grouped with Odostontin it has l)een widely known as Parthenhta, 

 (Parfhenia), but for some years the use of that generic name has been more or 

 less discontinued in favour of Pyrgidiua, which has now been adopted for the 

 present species and for some forms closely allied to it. 



Var. terebellum (Philippi). Plate XLIX, fig. 49. 



1844. Chemnitzia terebellum, Philippi, Euum. Moll. Sic, vol. ii, p. 138, pi. xxiv, fig. 12. 



1867. Odostoinia interstincta, var. terebellum, Jeffreys, Brit. Couch., vol. iv, p. 152. 



1873. Ttirbonilla intersfincta, \a,r. terebellum, Weiukauff. Cat. europ. Meeresconch., [i. 25. 



1900. Odosiomia interstincta, var. terehellum, Marshall. Jouru. of Couch., vol. ix, p. 292. 



1905. Parthenina interstincta, var. terehelhn.i. Kobelt, Icou. schaleutrag. europ. Meerescouch., vol. 



iii, p. 115. 

 1913. Pijryulina interstincta. var. terehellum, Dautzeuberg et Durouchoux, Feuille Jeuues Natur. 



vol. xliv, p. 37. 

 1920. Pyrcjidina interstincta, var. terebellum, Dautzeuberg, Jouru. de Couch., vol. Ixv, p. 54. 



Varietal Characters. — Somewhat larger, with an elongate and more slender 

 spire. The suture seems to be more distinctly channelled. 



Dimensions. — L. 3 mm. B. 1 mm. 



Distribution. — Becent : Oxwich Bay, Swansea; Cork, Channel Islands, Torbay,. 

 Plymouth. Bay of Saint Malo. 



Fossil : St. Erth, Sicily, Panormus. 



Remarhs.—K\\\\o\\g\\ originally described by Philippi as specifically distinct, 

 the present shell has been generally regarded as a variety of Pipriiilina interstincta. 

 The difference between our two specimens seems but slight, but it has been 

 recognised by M. Dautzenberg. 



Pyrgulina scalaris (Philippi). Plate XLIX, fig. 43. 



1836—44. Melania scalaris, Philippi, Euuiu. Moll. Sic, vol. i. p. 157, pi. ix, fig. 9, 1836: Chemnitzia 



sccdaris, vol. ii, p. 137. 

 1848—84. Odostomia scalaris, Jeffreys, Ann. Mag. Nat. Hist. [2], vol. ii, p. 346, 1848; Brit. Conch., 



vol. iv, p. 160, 1867 ; vol. v, p. 213, pi. Ixxv, figs. 7, 8, 1869 ; Proc Zool. Soc Loudon, p 355, 1884. 



