NERIN AA. 221 
whorls, later ones perfectly smooth. The only salience throughout the long and 
narrow spire is a slight spiral band on the posterior margin of each whorl. 
Body-whorl smooth, angular, elongate ; aperture oblong, with a canal rather 
long for the genus and slightly deflected. Section shows seven folds, arranged on 
the bacillus- or Oppelensis-plan. 
Relations and Distribution—In its narrow cylindrical outline and in the 
relative height of the whorls this species resembles Ptyg. bacillus, from which it is 
‘separated by the complete flatness of the whorls and the absence of any promi- 
nence at the sutures. Rare in the Pea-grit of Longfords. 
157. Nerina (Ptygmatis) consoprina, Witchell, 1887. 
1887. Neninxa consoprina, Witchell. Vol. cit., p. 33, pl. i, figs. 10, 10 a. 
As I have not seen the type, and never found a specimen which answers to this 
description, the species is inserted on the authority of Mr. Witchell alone. 
He says that it differs very little in its internal structure from N. Oppelensis, 
but it has a more conical figure and the whorls are higher. Found at Longfords 
in the Pisolite. 
158. Nerinma (Ptygmatis) veuox, Witchell, 1887. Plate XVI, fig. 1. 
1887. Nerinma vetox, Witchell. Vol. cit., p. 34, pl. ui, fig. 3. 
Description : 
Spiral angle (slightly obtuse) .. : + LOe 
Height of whorl to width ; : ape ecralcay 
Average length : : . 75 mm. 
Shell cylindro-conical, dimorphous. Whorls about thirty, of which the posterior 
two-thirds are deeply excavated and much thickened at the sutures. Ultimately 
the whorls become flat and without any sutural prominence. The whorls are 
extremely short, and no trace of spiral ornament has been detected in the specimens, 
though it is probable that the posterior whorls of the spire were spirally striated. 
The aperture is nearly square, with a short and not very reflexed canal. 
Section, seven folds, identical with that of Ptyg. Oppelensis. 
Relations and Distribution.—From Ptyg. Oppelensis this species differs in its 
more conical form, and in the excessive flatness of the anterior whorls. Rare in 
the Oolite Marl horizon of Swift’s Hill and Longridge. 
