BELLARDIELLA STRIA. 243 



Dimensions. — L. 12 mm. B. 5 mm. 



Disf/vihution. — Not known living. 



Fossil : Coralline Crag : Boyton. 



Upper Pliocene : Monte Mario. Pleistocene : Catania, Monte Pellegrino, 

 Ficarazzi. 



Bemarls. — The charming little shell from the Coralline Crag of Boyton here 

 figured belongs to the Sedgwick Museum at Cambridge, where it has been labelled 

 Glavatala linearis. It proves to be identical, however, with a Sicilian fossil, 

 Bellardiella volutella, a specimen of which the Marcliese di Monterosato has been 

 kind enough to send me for comparison. It has been recorded by Sign. Cerulli- 

 Irelli from the Upper Pliocene of Monte Mario, and occurs at a number of places 

 in the upper part of the Sicilian Pleistocene, as at Catania and at Monte Pellegrino 

 and Ficarazzi, near Palermo, together with Gyprina islandica and other northern 

 forms, an horizon which in the present Memoir I have regarded as more or less 

 contemporaneous with the Pleistocene of northern Europe. 



It is interesting to note that this shell has been met with at one locality only of 

 the Crag, suggesting, with other similar facts, that in spite of the labours of a 

 century we are still very far from possessing a full and exhaustive knowledge of 

 the Crag mollusca. 



The Marchese di Monterosato informs me that although the name of C. roliifella 

 sometimes appears in lists of the Recent mollusca of the Mediterranean it has never 

 l)een met with, in his opinion, as a living shell, and that the specimen recorded as 

 such by Kiener was washed in all probability by the sea from some adjacent 

 fossiliferous deposit. The present species has sometimes been identified with G. 

 infiata, Jan, but this he also thinks may have been an error. 



Bellardiella stria (Calcara). Plate XXIX, figs. 1,2. 



1840. Pleurotoma stria, Calcara, Ricerche malac, p. 11, jjI. i, fig. .5. 



1844. Pleurotoma semipUcatum, Philippi, Enum. Moll. Sicilise, vol. ii, p. 174, pi. xxvi, fig. 18. 



1847. Baphitoma stria, Bellardi, Mem. R. Aecad. Sci. Torino [2], vol. ix, p. 618, no. 8. 



1862. Pleurotoma semiplicatum B, var. minus, Brugnone, Mem. Pleur. foss. Palermo, p. 29, pi. i, 



fig. 22. 

 1873-5. Befrancia stria, Seguenza, Boll. E. Com. Geol. Italia, vol. iv, ■^. 298, no. 121, 1873; vol. vi, 



p. 208, no. 183, 1875. 

 1877. Homotonia stria, Bellardi, Moll. Terr. Terz. Piem.,pt. ii, p. 277, pi. viii, fi^. 25. 

 1910. Daphnella (Bellardiella) stria, CeruUi-Irelli, Palaeont. Ital., vol. xvi, p. 61, pi. v, figs. 54 — 57. 

 1914 Daphnella {Bellardiella) stria, CipoUa, Palaeont. Ital., vol. xx, p. 155, pi. xiv, figs. 1, 2. 



Specific Gharacters. — Shell thin, turreted, elongato-fusiform, ventricose; whorls 

 strongly convex, regularly diminishing in size, the last much the largest, two-thirds 

 the total length ; ornamented by numerous oblique and inconspicuous longitudinal 

 cost^e, which tend to become flexuous and to die out on the body-whorl, and by very 



