Lah eAA Le st ce 
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ons 
31 
rounded obtuse character of the folds, as shown in the figure. 
Having made sections of several specimens, I have come to the 
conclusion that the interior of this species is represented by fig. 
8a, Pl.I. This figure occurs, with slight variation, in four Inf. 
Oolite species and one in the Great Oolite, (vide list, p. 25.) 
These species are therefore to be determined chiefly by their 
external appearance, in which there is considerable diversity. 
Nerinza Hupuzsroniana, Witc. PI. I, fig. 4, 4a. 
Nerinea, sp. HuDLESTON. <<(Yontributions to the Paleontology 
of the Yorkshire Oolites,” Geol. Mag. N.8., Dec. 3, Vol. L., 
Pl. IV, fig. 7. 
Shell sub-conical, whorls about 15, concave, their height 
equal to three-fourths of the diameter, suture prominent, 
aperture unknown, columella with one fold anterior to the 
middle of the volution; there is a strong fold on the wall, and 
a, smaller fold on the posterior wall, spiral angle 15°, height 
24 inches. ; 
This specimen closely resembles the one figured by Mr 
Hupizsron from the Millepore bed of the Inferior Oolite of 
Yorkshire, but not named or described. The only observable 
difference is that this is more conical than the Yorkshire shell, 
but the unusual concavity of the whorls in each specimen, and 
the circumstance of their being from the same zone, point 
to their being the same species. 
; N. Eudesii, M. & L., is a much more conical species, and 
has fewer whorls, but is similar in other respects. 
Locality——Longridge, near Stroud, in the marly limestone 
bed. 
Nerinmza parva, Witc.,n.sp. Pl. I, fig. 5, 5a, 5b. 
Shell conico-cylindrical, whorls rather broad, their height 
equal to about half of their diameter, much thickened poste- 
riorly, giving a concave appearance to the lower part of the 
yolution, apex acute, aperture rather short, outer lip rounded, 
columella solid, with one fold below the middle of the volution, 
