OFT HT 
ee Bete eo 
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(2.) Species which have one fold on the outer wall, one on 
the columella, and one on the posterior wall. They are repre- 
sented by 10 species, viz.— 
Nerinea altivoluta, Wire. Inf. Oolite (Pisolite.) 
N. oolitica, Witc. Inf. Oolite (Marly limestone.) 
N. pseudo-cylindrica, D’ORB. do. do. 
’ N. Hudlestoniana, W1TC. do. do. 
N. parva, W1T¢. do. do. 
N. attenuata, W1TC. do. do. and Pisolite 
N. Voltzii, Dest. Great Oolite (Shelly bed.) 
N Eudesii, Mor. & Lc. G. Oolite (Shelly bed, and White limestone.) 
N punctata, VOLTz. do. do. 
N. intermedia, W1TC. do. (White limestone.) 
(3.) Species having two folds on the columella, one on the 
outer wall, and in some instances one on the posterior wall, 
viz.— 
N. cingenda, Putt. Inf. Oolite (Pisolite.) 
N. Dufrenoyi, D’ARCH. sp. G. Oolite (Shelly bed.) 
N. funiculus, DESL. do. do. 
(4.) Species having two folds on the columella, two on the 
outer wall, and one on the posterior wall, viz.— 
N. Guisei, Witc. Inf. Qolite, Clypeus Grit. 
(5.) Species more complicated in structure, having three 
folds on the columella, two or three on the outer wall, and one 
on the posterior wall. There are seven of these, viz.— 
_ _N. Oppelensis, Lyc. Inf. Oolite (Marly limestone.) 
N. producta, W1Tc. do. (Pisolite.) 
N. consobrina, Wire. do. do. 
N. paradoxa, Witc. do. do. 
N. pisolitica, W1TC. do. do. 
N. velox, Wire. do. (Marly limestone.) 
N. complicata, Witc. G. Oolite (White limestone.) 
Hight species are uncertain, on account of their crystalline 
condition, and cannot therefore be classified at present, viz.— 
N. Jonesii, Lyc. Inf. Oolite (Marly Limestone.) 
N. Stroudiensis, Wirc. do. do. 
N. conica, WiTc. do. do. 
N. undulata, WTC. do. (Clypeus Grit.) 
