314 Dr. F. R. Cowper Reed— 
Stropheodonta Murchison (D’Archiac & de Verneuil). 
1840. Orthis Murchisoni D’Archiac & de Verneuil, Z'rans. Geol. Soc., ser. 1, 
vol. vi, p. 371, pl. xxxvi, fig. 2. 
1882 ? Cas Me Barrois, Mem. Soc. Geol. Nord., ii, 1, p. 241, 
. ix, fig. 6. 
1887. Ry oRKnole Murchison Béclard, Bull. Soc. belge. geol. Pal. Hydr., 1, 
p- 89, pl. iv, figs. 17-19. 
1902. Stropheodonta Murchisoni Drevermann, Paleontographica, vol. xlix, 
p. 110, t. xiv, figs. 4-6, 7 (?), 8. 
This species was recorded by Kayser! in 1889 from the 
Meadfoot Beds below Kilmorie, and by Upfield Green? from 
Cornwall. There are several examples from Kilmorie, and possibly 
one from Smugglers’ Cove, in the Sedgwick Museum, but none are 
perfect and most are distorted. The characteristic coarse ribbing 
is, however, well seen, and in one case the fine radial striation 
between the ribs, which is specially mentioned by D’Archiac and 
de Verneuil® in a variety from Asturias (separated by Oehlert * 
as a distinct species, Str. diffusa), is well preserved. Drevermann 
(op. cit. swpra) says the ribs are sometimes simple and sometimes 
divided, and that at the submarginal geniculation of the shell they 
either disappear or are resolved into bundles of fine riblets. In one 
of our specimens the ribs become obsolete before reaching the 
margin, but they seem nearly always to be simple. There is one 
example of this species in the Jermyn Street Museum (22), labelled 
simply “ Torquay ”, but probably it came from Meadfoot. 
The group of species to which Str. Murchison belongs is compact 
and well differentiated, and it includes Str. Sedgwicki, D’ Arch. 
and de Vern., Str. acutiplicata (Oehl. & Dav.),® Str. diffusa Oehl. 
(if separated from Str. Murchisont), Str. virgata Drev.,° Str. fascigera 
Drev.,’ and the American forms Sér. galatea (Billings),° and Sér. 
parva Hall.? 
Horizons.—(1) Meadfoot Beds ; (2) Red Beds (Staddon Grits). 
Localities —(1) Kilmorie (8. 32, 54); (2) Smugglers’ Cove (S. 59) ; 
(3) “* Torquay ” (? Meadfoot) 22 M.P.G. 
Stropheodonta Sedgwicki (D’Arch. & de Vern.) var. rudis Kegel. 
This species,’ which has been described in some detail by 
Drevermann,” and compared with several other species of Lower 
1 Kayser, Neues Jahrb. f. Min. Geol., vol. i, 1889, p. 188. 
* Upfield Green, Gnor. Mag., Dec. V, Vol. I, 1904, p. 406. 
3 D’Archiac & de Verneuil, Bull. Soc. Géol. France, ser. 11, vol.ii, 1845, p. 477, 
pl. xv, fig. 7. 
4 Oehlert, Bull. Soc. Géol. France, ser. 11, vol. xxiv, 1896, p. 868. 
8 one & Davoust, Bull. Soc. Géol. France, 3, vol. vii, 1879, p. 708, pl. xiv, 
6 Drevermann, Palwontographica, Bd. xlix, 1902, p. 111, t. xiv, figs. 10, 11. 
7 Ubi, sp. 112) t. xiv, fig. 12: 
8 Clarke, Mem. 9, U.S. State Mus., 1908, p. 188, pl. xxxv, figs. 15-26. 
* Hall, Paleont., New York, vol. iv, 1859, p. 85, pl. xi, figs. 5, 11. 
10 D’Archiac & de Verneuil, Trans. Geol. Soc., ser. 11, vol. vi, 1840, p. 371, 
pl. xxxvi, fig. 1; Oehlert, Bull. Soc. Géol. France, ser. 111, vol. xvii, 1899, p. 776, 
[OI cab, ates B38 Goll Boe sites Ie 
11 Drevermann, Palcontographica, Bd.1, 1904, No. 6, p. 271, t. xxxi, figs. 21-6. 
