270 
DEVONIAN FAUNA. 
moderately convex back with an axis parallel to the perpendicular of the spire. 
The upper whorls hidden almost up to the shoulder. Surface smooth. 
Size. — Height 4 mm., width 9 mm. 
Locality. — There is a specimen in the Woodwardian Museum which was 
collected by my friend the late Mr. B. B. Tawney from Lummaton, and another 
specimen in the Torquay Museum, apparently from the same locality. 
Remarks. — This species is distinguishable by its almost flat spire, the very 
slight rising of the whorls from the suture, and the bluntly rounded or com- 
pressed appearance of the side of the whorls. Our specimens appear to 
correspond almost exactly with Miinster's figure of his Eu. helicinus, and I have 
no doubt that it must be referred to that species. To what genus, however, it is 
to be referred is another question. I should certainly not regard it as a 
Euomphalus, but as the mouth and umbilicus are hidden in the English specimens 
its place is not easy to decide. As far as the evidence goes it probably best 
agrees with the characters of Botellina, de Kon. 
Affinities. — Mimster distinguishes this shell from Euomphalus subcarinatus, 
Miinster,^ by the absence of any keel upon the back of the whorls. The same 
point and the much greater height and rotundity of its whorls separate it from 
Pleurotomaria gracilis, Phillips.^ 
Botella heliciformis, Goldfuss^ (= ? Helicites helicinseformis, Schloth.*), is a 
much more globose and rapidly increasing shell. Botella Wurmii, F. A. Romer," 
also appears decidedly more globose, though it closely resembles the present shell. 
Platyscliisma helix, Clarke,^ appears to be a wider shell with more transversely 
oval whorls. 
Botellina planorbiformis, de Koninck,''' has a rather longer and more slowly 
decreasing spire, and is not umbilicated. 
3. Sub-family. — Liotiin^, Adams. 
1. Genus. — Liotia, Gray, 1842. 
The shells of this genus have few whorls, are subglobose, and strongly 
ribbed or nodulated. They have a continuous subcircular mouth, and a very 
1 1840, Miinster, ' Beitr.,' pt. 3, p. 85, pi. xv, fig. 5. 
^ 1841, Phillips, ' Pal. Foss.,' p. 98, pi. xxxvii, fig. 181. 
3 1844, Goldfuss, ' Petref. Grerm.,' vol. iii, p. 102, pi. cxcv, figs. 7 a — c. 
* 1820, Scblotheim, ' Petrefact.,' p. 104, pi. xi, fig. 6. 
•' 1843, F. A. Eomer, ' Verst. Harzgeb.,' p. 30, pi. viii, figs. 6 a — c. 
6 1884, Clarke, ' Neues Jahrb. f. Min.,' Beil.-Band iii, p. 358, pi. iv, figs. 22—24. 
7 1881, de Koninck, ' Annales Musee Royal H. N. Belg.,' vol. vi, p. 92, pi. x, figs. 36—38. 
