112 W. H. Hndleston—On the Yorkshire Oolites. 



The ornaments consist of numerous fine spiral bands, and are best 

 defined in the upper | ths : anterior | ths very slightly constricted. 



This is an unique specimen, and it may possibly represent nothing 

 more than the apical conditions of N. cingenda in an unusually good 

 state of preserYation. Yet the spiral lines are finer and more 

 numerous, the constriction in the lower part of the whorl is hardly 

 marked, and no one of the sjDiral lines is sufficiently larger than 

 the rest to constitute a median varix. 



Relations and Distribution. — Unless specimens are well preserved, 

 it would not be easy to distinguish between Nerincea cingenda, Phil., 

 Nerinoia bacillus, D'Orb. (T. J. pi. 252, figs. 3-6) and some other 

 subcylindrical forms possessed of a marked sutural varix. All these 

 serve to illustrate the primitive forms of the genus. Specimens in 

 the Yorkshire beds are too badly preserved to entertain any very 

 close comparisons as to affinities. 



Abundant in the NerincBa-hed of the Dogger at Peak (Blue Wyke), 

 but not found, as far as my observations go, in any other part of the 

 Dogger, either at this place, or elsewhere. Imperfect specimens of 

 Nerincea, some of considerable size, such as Fig. 8, occur in the 

 Millepore Eock of Cloughton Wyke (Sycarham), and these are usually 

 referred to N. cingenda, Phil. Casts of Nerincea are also found in 

 the Scarborough Limestone (zone 3) of Cloughton Wyke (Hundale), 

 which might belong either to iV^. cingenda or to any other sub-cylin- 

 drical species. Some of these were lately collected by Mr. Herries. 



32.— Nerin^a, sp. Plate IV. Fig. 7. 



Description. — Specimen from the Millepore Oolite (zone 2), Whit- 

 well. York Museum. 



Length of portion preserved 64 millimetres. 



This fossil is flattened, as may be seen on examining the apical 

 end ; hence the entire figure is distorted — a circumstance which 

 might easily escape observation, since the flanks of the spire are 

 involved in matrix. No trace of ornaments can now be seen, but 

 considering the condition of the fossil, this proves nothing. One 

 peculiarity, which even distortion cannot hide, is the shortness of 

 the whorls, especially towards the apex, and the prominence of the 

 posterior border. 



This peculiarity would seem to remove it from N. cingenda, Phil. 

 If we make due allowance for the effects of flattening, this part of 

 the fossil presents some resemblance to N. Jonesii, Lycett (" Cottes- 

 wold Hills," p. 124, pi. 2, fig. 4). from the Fimbria-sieige, Nailsworth 

 Hill ; which species has also been detected by Mr. Walford at 

 Coombe Hill. The fossil now figured is the only specimen of 

 Nerincea which I ever saw from the Millepore Oolite. 



33.— Neein^a (?) CINGENDA, Sowcrby, 1825. PI. IV. Figs. 9 and 9a. 



1825. Turritella cingenda, Sow., Min. Concli., vol. v. p. 160, t. 499, fig. 3. 



1854. „ ,, ,, Morris, Cat. " Cor., Scarborough." 



1875. Nerincea ,, ,, non Phil. ; Phillips, G. Y. 3rcl edition, p. 258. 



Bibliography, etc. — Sowerby says that his type was found in 



