UNCITES. 103 
the absence of evidence to the contrary, they must certainly be regarded as 
distinct. 
It is not easy to decide to what genus they belong. From their likeness in 
general shape to B. Huntii it has seemed best to describe them provisionally as 
Bifida ? plana, though probably when better known they will have to be removed 
to some other genus. 
The texture of the shell seems coarsely tubular. 
4. Genus.—Rerzia, King, 1850. 
1. Rerzia toneiRostris, Kayser. 
1864, Rerzia Fertta, Davidson (not von Buch). Brit. Foss. Brach., vol. iii, pt. 6, 
p. 21, pl. iv, figs. 8—10. 
ISA —  tonetrostris, Kayser. Zeitsch. Deutsch. Geol. Gesell., vol. xxiii, 
p. 558, pl. x, fig. 5. 
1882. — a Davidson. Brit. Foss. Brach., vol. v, pt. 1, p. 29, 
pl. i, figs. 30, 31. 
1885. — = Maurer. Abhandl. Grossh. Hessisch. Geol. Landes., 
vol. i, pt. 2, p. 175, pl. vii, fig. 25. 
This species seems rather rare at Lummaton. I have about fifteen specimens 
in my Collection. Four specimens are in the Torquay Museum, one in the 
Woodwardian Museum, and five, including one of Davidson’s figured specimens, 
in the British Museum. 
From Wolborough two specimens are in the Museum of Practical Geology. 
Remarks.—There is no doubt that L. longirostris is quite distinct from LR. ferita. 
I question, however, whether f. Pelmensis, Kayser,’ may not be a young form of 
it. The beak varies much in length in English specimens. 
5. Genus.—Uncitss, Defrance, 1827. 
1. Unortzs crypuus, Schlotheim, sp. 
1820. TrEREBRATULITES GRyPHUS, Schlotheim, Petref., p. 259, pl. xix, fig. 1. 
1864. Uncrres erypuus, Davidson. Brit. Foss. Brach., vol. ii, pt. 6, p. 22, pl. 
iv, figs. 11, 12. 
1882. — _— — Ibid., vol. v, pt. i, p. 30, pl. ili, figs. 4—10. 
Localities—There are four fragmentary specimens in Mr. Vicary’s Collection 
from Wolborough, and two from Chircombe Bridge. 
1 1871, Kayser, ‘ Zeitsch. Deutsch. Geol. Gesell.,’ vol. xxiii, p. 556, pl. x, fig. 6. 
