﻿228 DEVONIAN FAUNA. 



Turritella Koninckiana, Goldfuss, 1 comes very close to it, but differs in being 

 decidedly more elongate, and in having flatter, shorter, and more numerous 

 whorls, and a more uniform striation. It is from the Carboniferous beds of 

 Ratingen. 



Semenow and Moller 2 figure as Turritella spiculum, Eichwald, 3 a minute species 

 which agrees with the present form in general shape, but it is quite impossible to 

 judge from their drawing whether its ornamentation is the same or not. Eichwald's 

 own description, however, shows that it possessed spiral, instead of transverse, 

 strias. 



4. Holopella Hennahiana, Sowerby, sp. PI. XVIII, figs. 16, 16 a. 



1840. Terebra Hennahiana, Sowerby. Geol. Trans., ser. 2, vol. v, pt. 3, pi. lvii, 



figs. 22, 22 a. 



1841. Loxonema Hennahiana, Phillips. Pal. Foss., p. 99, pi. xxxviii, fig. 184. 



1844. Melania antiqua, Goldfuss. Petref. Germ., vol. iii, p. 110, pi. cxcvii, 



fig. 14. 



1845. Teeebra Hennahii, Sow. Encyclop. Metrop. (fide Sowerby, Geol. Trans.). 4 

 ? 1853. Holopella tenuicostata, Sandberger. Verst. Rhein. Nassau, p. 228, 



pi. xxvi, figs. 7, 7 a. 

 1854. Loxonema Hennahiana, Morris. Cat. Brit. Foss., p. 255. 

 ? 1882. Holopella tenuicostata, Holzapfel. Palaeontogr., vol. xxviii, p. 249. 



1888. Loxonema Hennahiana, Etheridge. Foss. Brit., vol. i, Pal., p. 163. 



1889. Holopella tenuicostata, Whidbome. Geol. Mag., dec. 3, vol. vi, p. 30. 



Description. — Shell small, elongate, spiral, conical, acuminate, of many whorls. 

 Sutural angle slightly varying. Suture small, shallow. Whorls six or seven, 

 narrow, moderately convex, the convexity seeming to be rather less in the middle 

 of the whorl. Ornament consisting of numerous fine, distant, regular, nearly 

 straight, sharp lines, barely visible to the naked eye, and set perpendicularly to the 

 suture. Columella arched (?). Inner lip diffuse, callous. 



Size. — Height 24 mm., width 15 mm. 



Locality. — Lummaton. There are two specimens in the Battersby Collection 

 in the Torquay Museum. Sowerby records it from Plymouth. 



Ii'nnaiis. — I have not met with Sowerby's type of this species; but, as far as 



1 1844, Goldf., ' Petref. Germ.,' vol. iii, p. 104, pi. cxcvi, figs. 5 a — c. 



2 1863, Semenow and Moller, ' Ober-Dev. Schicht. des Mittl. Euss.,' p. 674, pi. iv, fig. 10. 



3 1860, Eichwald, ' Lethsea Rossiea,' p. 1120, pi. xlii, fig. 5. 



* This article appears to have been written by Sowerby before that in the ' Geol. Trans.,' 

 although not published till 1845. 



