Helix carinatus, J. Sowerby: Min. Conch., vol. i (1812), p. 34, pi. x, upper and lower figures. 'I was favoured with this specimen from near Settle in Yorkshire, by Mr. Ducket; it is in solid grey Limestone; the inside cast is distinct in some parts where the shell appears to have been broken. That part of the shell which remains, is now nearly transparent Carbonate of Lime. I expect this is not common, as I have never seen it in any other collection.'

Illustrated by John Phillips in his Illustrations of the Geology of Yorkshire (1836).

Pleurotomaria flammigera, Phillips: Illust. Geol. Yorkshire, pt. ii, The Mountain Limestone District, 1836, p. 226, pi. xv, fig. 2.

Phillips originally referred to this Pleurotomaroid shell by stating " colour varied with zigzag flashes." The markings mostly occur on the surface of the body-whorl and above the so-called band which characterizes this group of shells; only rarely are they seen below that structure. They consist of thick zigzag stripes, more or less equally spaced, regular, and arranged transversely, and between them can be seen the fine striations which form the sculpture of the shell. The zigzag markings were not present on the specimen selected for illustration when James Sowerby published his account of this species. In the meantime Phillips issued a remarkably good figure, showing these remains of ancient coloration, and referred his specimen to the hen new specific name, flammigcra. Subsequently James de Carle Sowerby completed the history of his father's species by publishing another figure of this shell which included the peculiar zigzag markings. In this representation it is noticeable that the stripes are seen to occur beneath the encircling band as well as above it. The later Sowerby also recognized that Phillips's flammigera "was synonymous with the earlier carinata.
The late Professor L. de Koninck included this species in his genus llourhnia. The specimen now figured has been slightly restored on
account of its basal contour being more or less fractured in places. The specimen is in the British Museum [G. 130].