247 
name, and which Sowerhy has represented in PI. 260, Pig. 5 of the Mineral 
Conchology. At any rate, I consider the figure on the same plate belongs to 
another species very like my C. irregularis, if it is not the same. All the 
species jnst mentioned differ from C. quadrisulcaia by their apical angle, by 
their surface ornamentation, or by the number of transverse folds in a given 
space. 
Horizon and LocaUlies . — The example of C. quadrisulcaia, which 
seems to me a typical specimen, was found by Miller in the lower beds of 
the Carboniferous Limestone near Bristol. It is generally supposed to be the 
same as that found ahnndantly at Gare, near Carluke, Scotland ; also at 
Broseley, and at some places in Coalbrookdale. The only specimen sent me 
from Australia was found in a brownish argillaceous limestone at Buchan, on 
the Gloucester. 
CONTJLAEIA LiEYIGATA, J. 3Iorris} 
PL XXIII, Pig. 1. 
Conularia IcEDigata, J. Morris, 1812, iu Strzeleclti’s Phys. Doscr. N. S. Wales aud V. D. 
Land, p. 290, pi. 18, fig. 9. 
,, ,, P. McCoy, 1817, Ann. Mag. Nat. Hist., XX, p. 30G. 
,5 ,, J. D. Dana, 1819, Geol. Wilkes’ U. S. Explor. Exped., p. 710, pi. 10, 
fig. 9. 
This is an elongated pyramidal shell, rectangular in section. The 
four faces are flat, or slightly depressed in the middle ; the angles are occupied 
by a simple shallow groove, into whieli the transverse folds of the surface jut 
alternately. These very slightly arched folds are convex from the side of the 
opening, and slightly interrupted in the middle by an indistinct longitudinal 
rib, which occasionally makes them alternate with each other. The folds are 
thin and sharp, and separated by smooth furrows much broader than the 
folds themselves. There are eleven or twelve to each length of ten milli- 
metres. 
Dimensions. — This species reaches a great length, if one may judge by 
the very slight convergence of the sides of these fragments, a convergence 
that indicates an extremely sharp apex, the angle of which would he of a 
very few degrees. 
1 [VVaagen, Records Geol. Survey India, 1886, XIX, p. 25, t. 1, f. 1 ; Salt Range Fossils (Pal. Indica), 1891, 
IV, Ft. 2, p. 123, t. 3, f. 1, 2, t. 4, f. 5.— W.S.I).] 
