B0NELLTT1A GRANULATA. 1-05 



Bonellitia granulata (Nyst). Plate XL, fig. 8. 



1843. Cancellaria granulata, Nyst, Coq. foss. Terr. tert. Belg., p. 479, pi. xxxix, fig. 14. 



1856. Cancellaria granulata, Beyrich, Zeitschr. Deutsch. Geo!. Gesell., vol. viii, p. 567, pi. xvii, 



figs. 7—9. 

 1867. Cancellaria granulata, Speyer, Palaeontographica, vol. xvi, p. 179, pi. xvi, figs. 6 — 8. 

 1913. Cancellaria granulata, Harder, Damn. geol. Unders^gelse [2], no. 22, p. 86, pi. vii, fig. 10. 



Specific Characters. — Shell solid, elongato-ovate, turreted ; whorls 6 or 7, 

 convex, the last about five-eighths of the total length ; ornamented by about a 

 dozen strong and somewhat oblique longitudinal costse, nearly equal to the inter- 

 spaces, and by rather strong spiral ridges which cause granulation where they 

 intersect the ribs; spire regularly diminishing in size towards an obtuse apex; 

 suture well-marked ; mouth oval, angulate above ; columella with three folds ; 

 canal very short. 



Dimensions. — L. 17 mm. B. 9 mm. 



Distribution. — Not known living. 



Fossil : Newbournian Crag : Bentley, probably derivative. 



Upper Oligocene : north Germany. Middle Oligocene : Denmark. 



Remarks. — The fossil here figured was found among- some Crasr material from 



O O CD 



Bentley received from my friend Prof. P. G. H. Boswell. Although not quite 

 perfect it shows clearly its original form and sculpture. It approaches an 

 Oligocene shell described by Nyst in 1843 as Cancellaria elongata (Coq. foss. Terr. 

 tert. Belg., p. 476, pi. xxxviii, fig. 21), as to which Wood states he had found in the 

 Coralline Crag an imperfect specimen which somewhat resembled it. The Bentley 

 shell appears, however, to differ materially, both in form and sculpture, from the one 

 described by Nyst under that name, and I am disposed rather to refer it, at least 

 provisionally, to another Oligocene species, B. granulata, with which I think it 

 more nearly agrees. In any case our fossil is probably derivative in the Crag. In 

 endeavouring to identify our Crag specimens with those of other times and other 

 regions we may remember, first, that many species are very variable, and next, that- 

 one cannot place implicit reliance on non-photographic figures. This may be 

 illustrated by a comparison of those of the present species given by the three 

 authors mentioned above. 



Bonellitia incerta, sp. nov. Plate XL, fig. 9. 



Specific Characters. — Shell minute, fragile ; whorls 4, convex, the last tumid, 

 much the largest, two-thirds the total length ; ornamented by rather distant costse, 

 not so wide as the spaces between them, and by clearly marked spiral ridges ; 

 spire short, truncated, ending abruptly in a very small apex ; suture deep ; mouth 



