534 W. H. Hudleston—The Yorkshire Oolite. 
though at present it is customary to regard them as belonging to 
Littorina—an arrangement which is perhaps provisional. De Loriol 
and Pellat restore to this class of shell the generic name of Turbo, 
though the reasons adduced by Deslongchamps * for excluding at 
least a part of them from the family Turbimde remain as good as 
ever. 
The same difficulty, encountered in dealing with Cerithiwm lime- 
forme, meets us in describing the three distinct forms which are 
usually classed in collections under the heading L. muricata, Sow. 
Perhaps the Yorkshire specimens are not exactly similar to the 
species with which they have been correlated. Sowerby himself 
was prepared for a division of L. muricata, since he observes that 
there are three species which have been confounded together, but 
which he hopes hereafter to show are quite distinct. 
33.—Lirrorina murtcata, Sowerby, 1821. Pl. XVII. Figs. 7, 8, 9.’ 
Turbo muricatus, Sowerby, 1821, Min, Conch. vol. iii. p, 70, pl. 240. 
Bibliography, etc—Sowerby refers to the table in Smith’s Strata 
entitled “Coral Rag and Pisolite,” where there is a good figure. 
The specimen figured by Sowerby came, we may infer, from Steeple 
Ashton, and has a general resemblance to Fig. 9a. He describes 
it as very pointed, and nearly as wide as long: the ornaments are 
described in very general terms. The plaited lip and indentation 
of the columella are given as essential characters. 
A.—Variety sometimes referred to Lirrortna Merrant, Goldfuss, - 
1844. 
Turbo Meriani, Goldfuss, 1844, Petref. vol. iii. p. 97, pl. 193, fig. 16. 
Idem, D’Orbigny, 1850, Terr. Jurass. p. 355, pl. 335, figs. 1—6. 
Bibliography, ete. — This is a regular Oxfordian form, and 
D’Orbigny fancied it might be the same as Phillips’s Turbo suleo- 
stomus. His figure and description refers to alarger shell than ours. 
The proportions are about the same, and he allows considerable 
latitude for the ornaments. 
Description (Fig. Ta).—Specimen from the Lower Calcareous Grit 
of Scarborough (Leckenby Collection). 
Teri GIB ey totahteceecnc La sistas nae aks eas CeO 14 millimétres. 
S\AVAUG Til TE VSS hones RRO A Was 2 Liter me TUES) 11 ‘ 
Spinalanmlesaverabesscn ulster git a oem ee 67°. 
Shell rather longer than wide. Spire composed of about six 
whorls, separated by wide and tolerably deep sutures, which materi- 
ally affect the contour of the shell. The penultimate whorl has 
three transverse costs, very spiny, the lowest one being the strongest 
and most prominent. The last whorl has four spiny bands in the 
posterior portion: of these the two middle ones form a slightly raised 
eae ee the shell. The base of the whorl and the aperture are 
neealed. 
ae) 7b represents an enlargment of the upper part of the last - 
whorl. 
* Bull. Soc, Linn, Norm, 1860, Note sur le genus Eucyclus, 
