NERINiEA. 203 



135. Nertn^a pseodocylindrica, lyOrhigmj, 1850, fide Lycett, 1857. Plate XIII, 



fig. 9 and ? fig. 11. 



1842. Neeinjea ctlindrica, Deslongchamps. Mem. Soc. Linn. ]^orm., vii, p. 187, 



pi. viii, fig. 33. 

 1850. — PSEUDOCYLiNDKiCA, D'Orb. Prod., i, p. 298 (Et. Bathonien). 



1852. — — — Terr. Jurass., vol. ii, p. 86, pi. cclii, 



figs. 11—13. 

 1857. — — — Lycett, Cotteswold Hills, pi. ii, fig. 5. 



Bibliography, Sfc. — Lycett makes no mention of D'Orbigny's species in the text 

 of the ' Cotteswold Hills.' His specimen (in the Jermyn Street Musenm) is much 

 longer than the one now figured, and may indeed differ both from the forms here- 

 under described and also from the Bathonian species, originally figured and 

 described by Deslongchamps, and renamed by D'Orbigny. 



Description : 



Spiral angle (very regular) . . 8°. 



Height of whorl to width . . .1:1. 



Length .... 50 — 120 mm. 



Shell subcylindrical, subulate. Whorls about sixteen in the specimen figured, 

 but sometimes more, flat, about as high as wide and scarcely projecting ; they 

 are separated by an open and somewhat depressed suture. Numerous fine spiral 

 lines ornament the whorls, but they become fainter in the more advanced whorls. 



Body-whorl nearly smooth, not salient, aperture narrow. Section triplicate ; 

 a deep fold with a square head occupies the centre of the outer wall, one very 

 small fold towards the base of the columella, one fold on the posterior wall. 



Relations and Distribution. — Distinguished from the next species by its wider 

 spiral angle. A few specimens have been found in the Oolite Marl horizon of 

 Longridge. The fragment from Weldon (fig. 11) may represent the same species 

 in a different state of preservation. 



136. Nerintea altivoluta, Witchell, 1887. Plate XIII, figs. 10 a, 10 h, 10 c, 10 (/. 



1887. Nerin.tda altitoluta, Witchell. Vol. cit., p. 33, pi. i, figs. 11, 12. 



Bibliography, ^c. — This species was founded by Mr. Witchell on fragments of 

 the posterior portion of a very cylindrical Nerinaea. It is believed that specimens 

 (such as 10 a and 10 d) represent apical conditions of this species. 



