36 MOLLUSCA FROM THE GREAT OOLITE. 



sharper folds on the columella. With N. elegans (Thurm.) it may perhaps be identical, in 

 which case that name must be adopted for it : until this is decided we must call our shell 

 N. punctata, as it is clearly the species so designated by Yoltz. 



Sutural angle, about 92 



Basal angle, about 120 



Length, from 1 to 2 inches. 



Locality. Found in the shelly beds near Minchinhampton, and more frequently in the 

 quarries to the north of the vale of Chalford. 



NERIN^A FUNICULTJS, Desl. Plate VII, fig. 12, 12a, b. 



NEBULA FUNICTJLUS, Deslongchamps. 1842. Mem. Soc. Linn. Normandie, vol. vii, 



p. 186, t. 8, figs. 3032. 



CYLINDRICA, Deslongchamps. L. c., t. 8, fig. 33. 

 CERITHITJM BLAINVILLII (?), Deslongchamps. L. c., t. 8, fig. 35. 

 NERINJEA FUNICULOSA, D'Orb. Prod. Pal^ont., p. 298. 



]V. Testa turritd, longissimd; anfractibus superioribus concavis, transverse striatis, 

 inferioribus subplanis, aliis ad suturas tumescentibus, aliis via; prominulis; columella solidd, 

 triplicatd, labro dcxtro uniplicato. (Deslongchamps, 1. c.) 



Shell very long and taper, but differing in the spiral angle in different specimens from 

 8 to 12; the upper whorls are concave, with a strong projection at the suture, variously 

 ornamented with from 5 to 10 transverse ribs of unequal fineness, one or two of which (in 

 very well-preserved specimens) are seen to be composed of small knobs ; the lower whorls 

 become gradually flatter and smoother, and finally lose all traces of ribbing : columella 

 solid. Four internal folds, viz. : one strong, thick fold on the outer lip, rather below the 

 middle of the whorl ; two on the columella, of which the lower sharp and well-defined is 

 situated below that on the outer lip, and the upper faint and sometimes hardly visible, is 

 placed opposite to the upper edge of the outer fold ; and one sharp and long fold on the 

 top of the whorl, close to the columella. 



Nerinaa cylindrica of Deslongchamps appears to be a tapering variety of the same shell, 

 in which the upper fold on the columella is ill-developed, or perhaps imperfectly seen. 



This species is also closely allied to N. fibula, N. Goodhatti (not Sowerby's species), and 

 N. clavus of Deslongchamps, all of which are probably one species : it differs from them in 

 the greater concavity of the whorls, the transverse ribbing, and the presence of the upper 

 small fold on the columella. It has probably been confounded with N.fasciata of Romer 

 a species which sadly wants revision. 



Sutural angle, about 105. 



Basal angle, about 120. 



Length, up to 5 inches, but rarely exceeding 3 inches. 



Locality. It is tolerably abundant in the shelly beds near Minchinhampton ; but owing 

 to its great fragility, large specimens can rarely be procured entire. 



