359 
ON SOME CARBONIFEROUS AMMONOIDS NEW TO ENGLISH 
ROCKS. 
By the late Lt.-Col. W. Hind, T.D., M.D., F.R.C.S., F.G.S. 
(Read November 26th, 1919). 
The quarry at Kniveton, Derbyshire, north of Standlow farm, 
has yielded a fauna characteristic of Vaughan's Caninia horizon and 
certain goniatites new to England occur there. Two of them have 
been described from a similar horizon in Ireland. It is important 
to publish these facts and to figure the English specimens in order 
to establish a Goniatite zone in Upper C beds, which is lower than 
any previously known in the Carboniferous series. Three species of 
Ammonoids,^ which are unknown at other levels, characterise the 
horizon — Pericycliis fasciculatus M'coy, GUfphiocems inconstans de 
Koninck, G. corpulentum Foord. 
GLYPHIOCERAS INCONSTANS, de Koninck, 1880. 
Ghjphioceras inconstans de Koninck, 1880; Ann. Mus. Roy. (V Hist. 
Nat. de Belgique, Faune de Calcaire Carh. de la Belgique, Tom. 
v., 2me Pt., p. 120, PI. XVIII, figs. 4, 5, 6, 7, 8, 9. 
Spf.cific Characters. — Shell discoidal, compressed, involute, 
attaining a diameter of 70 mm. in well-grown examples. Greatest 
thickness at the umbilical edge. Inclusion not complete. Whorl 
sub-elliptical. Body chamber occupying almost the whole of the last 
whorl. Whorls several. Periphery regularly arched in the young, 
becoming flattened in the larger specimens. Umbilicus small and 
deep, its margin rounded and simple. Camerse are deep — about 8 to 
the whorl. Shell apparently thin, ornamented by almost obsolete 
transverse lines of growth, arched sinuously on the periphery, so that 
they are slightly concave forward and form a very shallow sinus there. 
The suture line : the peripheral lobe is deep and broad, with parallel 
borders, and is markedly trifid ; the peripheral saddles are broad and 
rounded ; the lateral lobe V-shaped, and the lateral saddle obtusely 
rounded. 
Dimensions. — The specimen figured by Foord in Plate XLlla., 
which is a medium-sized individual, measures in diameter 50 mm., and 
transversely 15 mm. 
