106 DEVONIAN FAUNA. 
Localities. —There are eight specimens in my Collection from Lummaton 
belonging to either Hall’s or Rémer’s species; and several of Mr. Vicary’s 
specimens of Sp. wndifera are of the same shape. 
Remarks.—The variety wndulata is said to differ from Sp. wndifera only in 
having strong and angular instead of slight and rounded ribs. At first sight it 
might well be regarded as a distinct species, but on a specimen being sent to 
Davidson he pronounced it a variety of Romer’s shell. 
Only one of my specimens has retained any part of its surface, and that is 
marked by fine, close, distinct, radiating lines, unbroken by any transverse 
markings, which imply that this specimen, at least, had a totally distinct surface 
character, and is identical with Sp. concinnus, Hall. 
Davidson, however, describes the variety wndulosa as “regularly crossed by 
numerous concentric ridges, as in the type wndifera.” Without further evidence 
it is impossible to solve the problem thus presented. Whether Sp. concinna should 
take a place in our list, by addition or substitution, I am not prepared to say ; 
but I can hardly imagine that the specimen above mentioned can belong to 
Sp. undifera when it differs so definitely from it in its finer ornamentation; and 
that fossil at all events ought probably to be referred to Hall’s species. 
The ribs of some of my specimens are bifid near the margin. 
The species named by Barrande’ Sp. nobilis and Sp. viator only differs in 
having a rather wider fold. 
5. SPIRIFERA NupA, Sowerby. 
1840. SprrirEra nupaA, Sowerby. Geol. Trans., ser. 2, vol. v, pt. 3, pl. lvii, fig. 8. 
1864. — — Davidson. Brit. Foss. Brach., vol. iii, pt. 6, p. 38, pl. iv, 
figs. 17—24. 
Localities.—From Lummaton forty-eight specimens are in my Oollection, 
thirteen in the Woodwardian, four in the British Museum, and three in the Bristol 
Museum. From Wolborough there are five in the Museum of Practical Geology, 
and one in Mr. Vicary’s Collection. 
Remarks.—The fine transverse lines in this shell are rather coarser than those 
of the adjoining species, and appear to be simple ridges unbroken by serrations or 
imbrications. 
* 1879, Barrande, ‘Syst. Sil. Bohém.,’ vol. v, pl. vii, figs. 4—15; and pl. lxxiii, fig. 3, 1-8; and 
pl. exxiv, figs. 6a—e, Et. E. 
