160 GASTEROPODA OF THE INFERIOR OOLITE. 
81. Creritaium Brani, var. WELpoNIs, sp. nov. Plate IX, figs. 6a, 6b, 6c; 6'a, 
6° 6; 6" ¢, 6d: 
Description.—Sub-variety A with five spirals. Three specimens are figured 
figs. 6 a, 6 b, 6 c), each showing some difference of ornament or condition. The 
usual form is decidedly pupoid, and the ornaments are rather coarser and 
more open than in the Dogger specimens. It often happens that in the sub- 
apical whorls the tubercles are so fused together axially as to produce a costate 
appearance. The uppermost row of spirals is very strongly tuberculated, and the 
distinctions as to the fineness of the third and fifth spirals not so strong as in 
Dogger specimens. Specimens of C. Beanii from the Inferior Oolite of Cleeve 
much resemble these forms, though slightly larger. These are in Mr. Brodie’s 
collection. 
Sub-variety B with four spirals (figs. 6’ a, 6’ b, 6c, 6’ d). The ornamentation 
is, on the whole, similar to the preceding, but the general form of the shell is 
more stumpy. This, for the sake of distinction, we might term C. Beanii- 
quadricinctum. 
There are also other forms with four spirals approaching C. limeforme. 
Relations and Distribution—The fossils described under the above heading, as 
C. Weldonis, afford an excellent example of the proneness to change of form and 
ornament in these small pupoid Cerithia. They are very abundant in the 
Lincolnshire Limestone of Weldon, and less so at other fossil-localities in that 
Limestone, where for the most part their place is taken by C. limezforme 
and its relatives. 
82. CeriTHium quapricinctum, Minster, 1844. Not figured. 
1842—1844. CrrrrHium guavricincruM, Miinst. Goldfuss, Petr. Germ., t. 173, 
fig. 11. 
The sub-varieties of O. Beaniit with four spirals are passing into the form 
figured by Goldfuss, but their ornaments are less regular and the shell more 
pupoid. Very rarely, however, specimens occur in the Lincolnshire Limestone, 
where the granulations are small and regular, and the shell less pupoid. These 
we seem justified in referring to C. quadricinctum. 
