Vol. 68.] LOWER CARBONIFEROUS GASTEROPODA. 301 



the two last-named also in the absence of an umbilicus ; it comes 

 nearest to Bemhexia (Ehlert, but has less angular whorls and the 

 columellar lip simple. From these genera it is further separated 

 by its very oblique lines of growth. The character of these latter 

 and of the band suggests that there was a slit of some depth in the 

 outer lip. The structure of the test somewhat resembles that of 

 Tropidos^troijJia, the lines of growth being irregular and broken, 

 and there are also numerous pittings ; the former, however, are 

 finer, and the latter smaller. 



Eange. — I am acquainted with only two species, which are 

 from the Lower Carboniferous of Ireland. 



FOORDELLA HIBERNICA, sp. UOV. (PL XXIX, figS. 3 & 4.) 



Caliendrum vittatum (Phill.) (pars) J. Donald, 1895, Q. J. G. S. vol. li, p. 231. 



Diagnosis. — Shell large, composed of more than seven whorls. 

 Whorls convex, somewhat flattened above, ventricose, increasing 

 rather rapidly. Surface smooth, with the exception of the lines of 

 growth. Sinual band broad and flat or slightly concave. Lines 

 of growth distinct, varying in strength, strong ones being inter- 

 calated with fine. 



Remarks and resemblances. — The holotype was in the 

 collection of Dr. A. H. Foord (Dublin), but it is now in the Munich 

 Museum. This species bears some resemblance to Ptydiomphalus 

 iurhiniformis De Kon.^ and Pt. onucronatus De Kon.," with the types 

 of which I have compared it; it diff'ers from both in the character 

 of the lines of growth, and from the former also in the higher 

 spire and greater width of the whorls. The general form is 

 nearer that of the latter ; but the only specimen of this species to 

 be seen in the Brussels Museum is smaller, and too badly preserved 

 for accurate comparison. 



Dimensions. — The holotype = 7 centimetres in length and 

 5'6 cm. in width. 



Localities.— The holotype(Pl.XXIX,fig.3) is fromSt.Doulaghs, 

 about 6 miles north of Dublin. Another fairly-preserved specimen, 

 which is in Trinity College Museum, Dublin, came from Kildare. 

 An individual (No. 25,513) in the Museum of Practical Geology 

 London, but small portions of the test of which are intact, appears 

 to be conspecific, and comes from the same locality. It is remarkable 

 for having a fold behind the columella at the base of the aperture 

 w^hich is suggestive of channelling, a feature that I have not 

 observed in any other specimen of the genus (PI. XXIX, fig. 4). 



Horizon. — Lower Carboniferous Limestone. 



FOORDELLA TERETICIN-CTA, sp. UOV. (PI. XXIX, figS. 1 & 2.) 



Diagnosis. — Shell large, composed of more than seven convex 

 whorls. Sinual band rather wide, convex, submedian on the 



^ ' Faune du Calcaire Carbonifere de la Belgique ' pt. iv, Ann. Mus. Roy. Hist. 

 Nat. Belg. vol. viii (1883) p. 39 & pi. xxiv, figs. 7-8. 

 ^ Ibid. p. 39 & pi. xxix, figs. 1-2. 



