﻿180 DEVONIAN FAUNA. 



from Brushford described in the ' Pal. Foss.' under the name of " Loxonema 

 rugifera" Phillips, 1 belongs to the same species as the Yorkshire shell. It is much 

 more similar to the present form, but, as Mr. Roberts agrees with me in thinking, 

 quite distinct from it. Its whorls are narrower and more convex, the ridges appear 

 fewer, and there are varices present of which there are no indications in the 

 Wolborough fossil. Holzapfel, on the other hand, describes under the name of 

 Holopella scalariseformis a shell from Adorf, which is very defective, consisting of 

 a single whorl in poor condition, but which, as far as can be seen, there is every 

 reason to regard as agreeing with our English specimen. It seems, moreover, 

 exactly to correspond with the shell described by Trenkner and Clarke under the 

 name of L. rugiferum. 



Affinities. — Loxonema funatum, F. A. Romer, 2 differs from it in having its 

 transverse ridges much arched and oblique, instead of being straight and almost 

 parallel to the apical perpendicular. 



In Loxonema angulosum, F. A. Romer, 3 the ridges are more arched and much 

 more numerous, and the whorls more evenly convex. 



Ohemnitzia rugifera, de Koninck, 4 agrees with the Yorkshire and not with the 

 present species. 



6. Loxonema conic um, n. sp. PI. XVIII, figs. 7, 7 a, 8. 



Description. — Shell large, spiral, very elongate, many-whorled. Suture small, 

 simple, hardly indenting the outline of the side. Whorls very broad, overlapping 

 the suture, with almost fiat sides. Body-whorl curving in very suddenly below to 

 form the base of the shell. Aperture apparently not much expanded or produced 

 below. Surface finely reticulate, having sharp and irregularly distant longitudinal 

 lines sloping rather backward from above, and rather smaller and more numerous 

 sharp spiral lines. Base of shell apparently smooth. 



Size. — Height of specimen containing three whorls 37 mm., width 19 mm. 



Locality — There is a fine, though characteristically worn, specimen from 

 Wolborough in the Battersby Collection of the Torquay Museum, which consists 

 of the three lower whorls ; and two smaller specimens from Lummaton (?) in the 

 same Museum, which have entirely lost the shell and are somewhat crushed, but 

 which probably belong to the same species, though they might almost as well 

 belong to Holopella. 



1 1841, Phillips, 'Pal. Foss.,' p. 101, pi. xxxviii, fig. 188. 



2 1855, F. A. Eomer, ' Beitr.,' pt. 3, p. 14, pi. iii, fig. 18. 



3 1850, ibid., pt. 1, p. 3, pi. i, fig. 5. 



* 1842-4, de Koninck, ' Dese. Anim. Foss.,' p. 402, pi. xli, fig. 2. 



