CIRRUS. 313 
the figured specimen, though unusually fine, is thoroughly representative (I have 
one even larger). The French specimen, according to the figure in the ‘ Terrains 
Jurassiques,’ has the whorls somewhat more angular than the Coker variety, but 
there does not seem anything in the author’s description to bear out this feature. 
Some of the Coker specimens show the laminated structure due to the oblique 
growth-lines, which is also very conspicuous in the types of Cirrus pyramidalis. 
Smaller specimens of Cirrus Calisto, crushed and badly preserved, occur in the 
Pea-grit at Longfords and at Crickley. 
246. Crrrus varicosus, sp. nov. Plate XXV, fig. 2 
Description : 
Length ; : . 20 mm. 
Height of body- sane to total hanes : . 44:100. 
Spiral angle (mean) . 2 02", 
Shell sinistral, turbinate, miodoritely ninbilieatede spiral angle concave. 
Number of whorls probably ten; apical ones unknown. ‘The whorls are convex, 
widely separated by the suture, and ornamented by numerous rugose spiral lines, 
whilst the traces of axial coste are slight and confined to the posterior half of 
each whorl. About three stout varices are developed in each whorl, but not in 
regular sequence, and this kind of ornamentation is continued throughout the 
base to the margin of the umbilicus. 
The body-whorl is moderately ventricose and without keel ; aperture circular, 
adherent, and probably expanding. 
Relations and Distribution.—There can be no doubt that this form is closely 
related to Cirrus Calisto, i.e. to the Coker variety of that species. But it cannot 
be regarded as merely the local representative of the Coker fossils, for we 
find exact micromorphs of these on the Pea-grit horizon. There is every reason 
to believe that Cirrus varicosus occurs in the Oolite-Marl, and thus represents the 
calisto-group on a somewhat higher horizon. Extremely rare. 
247. Cirrus noposus, Sowerby, 1818. Plate XXV, fig. 6. 
1818. Crrrus noposus, Sow. Min. Conch., pl. cexix, figs. 2 and 4. 
1879. — — sp., J. Buckman. Proc. Dorset N. H. Field Club, p. 187, 
pl., figs. 38, 3 a. 
Non Ctrrrus noposus, Sow. Min. Conch., pl. exli, fig. 2. 
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