336 
HIND : NEW SPECIES OF LAMELLIBRANCHS. 
border. Hinge line arcuate. Umbo small, pointed, sub-central. 
The shell is regularly swollen, but somewhat compressed towards 
the posterior superior angle. 
Exterior : — The shell is ornamented with very fine concentric 
lines of growth. 
Dimensions : — A left valve measures : Antero-posteriorlj^, 
7 mm. ; Dorso-ventrally, 7 mm. ; Gibbosity of valve, 1 mm. 
Localities : — Brodsworth ; Wentbridge Boring, 193 and 
333| feet from the surface. 
Observations : — I refer this species without hesitation to 
Scaldia, although I have not seen the hinge. It has been found 
by Mr. Culpin at Brodsworth, and by Mr. E. Hummel at two 
horizons in the Wentbridge Boring. 
The species is much larger than Scaldia minuta, Hind, from 
the Coal Measures of North Staffordshire, but smaller than 
the Carboniferous Limestone species, and the concentric markings 
are much finer than in the latter species. 
