SCALA (OLATHR()S(JALA) CANCBLLATA. 551 



Vail den Broeck's specific naiiiu of toniJosn. It cannot now be traced, but it is 

 quite perfect, and judging from Wood's figure seems to have been a genuine Crag 

 shell and not derivative. 



*S'. tortdosa appears to have been a variable form, Prof. Sacco having figured 

 seven distinct and named varieties of it as Italian fossils. He considers that the 

 Boyton shell, although " assai viciiia al ti/po,'' is different from any of them, 

 proposing to call it var. aiKjlormti. M. de Boury, however, preferred to retain 

 that name as that of a distinct species.^ 



There is an imperfect specimen from Waldringfield in the British Museum of 

 Natural History, now figured, which seems to be the same as Wood's shell. 

 M. Van den Broeck states that /V. tornlosa is common in the Bolderien (Miocene) 

 of Antwerp. 



Suh-gemis CLATHROSCALA, de Boury. 

 Scala (Clathroscala) cancellata (Brocchi). Plate XL VIII, fig. 1). 



1814. Turbo cancellatus, Brocchi, Coiicli. foss. subap., vol. ii, p. 377, pi. vii, fig. 8. 



1826. Turrilella cancellata, Risso, Hist. nat. Eur. mcrid., vol. iv, p. 110, pi. iv, fig. 40. 



1870. Scalaria cancellata, A. Bell, Jouru. de Oonch., vol. xviii, p. 351, uo. 364. 



1871. Scalaria cancellata, Nyst, Anu. Soc. malac. Belg., vol. vi, p. 96, no. 46. 



1872. Scalaria cancellata, S. V. Wood, Mon. Crag Moll., 1st SnppL, pt. i, p. 69, pi. iv, fig. 2. 

 1876. Scalaria cancellata, Seguenza, Boll. E. Com. Geol. Ital., vol. vii, p. 96, no. 611. 

 1878. Cirsotrenia cancellata, de Stefani e Pantinelli, Boll. Soc. Malac. Ital., vol. iv, p. 85. 

 1898-91. Scalaria cancellata, Sacco, Boll. Soc. Geol. Ital., vol. viii, p. 352, no. 1870, 1889; vol. ix, 



Clathroscala cancellata and vars., p. 322, no. 5268, 1890 ; Moll. Terr. Terz. Piem., pt. ix, p. 84, pi. ii, 



figs. 93,94, 1891. 

 1890. Clathroscala cancellata, de Boury, Boll. Soc. Malac. Ital., vol. xiv, p, 216, uo. 31. 

 1912. Clathroscala cancellata, Cossmanu, Ess. Pak'oconcli. compar., vol. ix, p. 70, pi. iii, fig. 25, 26. 



Specific Gharacteis. — Shell fairly solid, imperforate, turreted, subulate ; spire 

 slender, elongate ; whorls about 12, with an occasional varix, slightly convex, 

 regularly diminishing upwards, the last about one-third the total length ; 

 ornamented by numerous fine longitudinal and spiral ridges extending obscurely 

 to the base, which is obtusely angulate and flattened ; suture well-marked but not 

 deep ; peristome continuous ; mouth subovate. 



Dimensions. — L. 33 mm. B. 10 mm. 



Dlstrihiitloih. — Not known living. 



Fossil : Coralline Crag : Orford. 



Miocene : Turin, Tortona. 



Lower Pliocene : Biot, Ligurian coast, Siena. 



^ In a recent letter M. de Boury expressed a doubt whether this species might not belong to the 

 sub-genus Hemiacirsa. 



