114 W. H. Sudledon — On the Yorkshire Oolites. 



1829 and 1835. Terebra granulata, Phillips, G. Y. pp. 116 and 165, pi. vii. fiir. 16. 

 1849. ^Uerithium tortile, Desl. (M.L.S.N. 7, p. 200, pi. 11, fig. 15), D'Orb. 



Prod. p. 302. 

 1854. Cerithimn grannlatum, Phil., Morris Cat. p. 240. 

 1863. Nerincea granulata, Phil., Lycett, Suppl. Great Ool. MoU. p. 10, pi. 31, 



figs. 12, Via. 

 1875. Nerincea granulata, Phil., G. Y. 3rd edition, p. 258. 



Not having been able, until quite recently, to obtain a glimpse of 

 any fossil which could be referred to this species, I had determined 

 to exclude it from this memoir, which professes to deal with fossils 

 actually seen. When the only specimen did turn up, it was too late 

 to have it figured in Plate IV. 1 must, therefore, refer to Lycett's 

 figure and description. 



Terebra granulata, Phil., is undoubtedly a Nerinaa, not hitherto 

 discovered out of the Yorkshire Cornbrash, where it is excessively 

 rare. It is very distinct from a shell, rather plentiful in the York- 

 shire Corallian, usually referred to N. Roemeri {=zN. fasciata, Eoemer, 

 non Voltz.). 



35. — Nekin^a, sp. Plate IV. Figs. 10 and 10«. 

 The specimen figured as above belongs to the Leckenby Collec- 

 tion, where it is labelled " Nerincea fasciata, Voltz. ; Cornbrash, 

 Scarbro'." The matrix is a little i^eculiar, but on the whole re- 

 sembles that of the Scarborough Cornbrash more thaa any other. 

 Description — 



Length of spire remaining 30 millimetres. 



Width 4 



Spiral angle ? 4°. 



Shell very narrow, subcyliudrical. Number of whorls remaining 

 about 13 ; these are nearly flat, but with a slight constriction in the 

 lower part, whence they rise suddenly to a conspicuous spiral varix 

 at the base. There are about 6 fine spiral lines on each whorl, some- 

 what unequally distributed, the two centre ones being rather the 

 strongest. Aperture involved. 



Relations and Distribution. — From Nerincea granulata this shell is 

 clearly distinguished by its smaller spiral angle, more cylindrical 

 outline, by the fewer number of spiral lines, and especially by the 

 spiral varix at the base of each whorl. With Nerincea Boemeri (i.e. 

 fasciata, Eoemer), a common Corallian fossil,^ its affinities are closer. 

 However, it would seem to have a smaller spiral angle even than 

 the Corallian species, whilst the spiral lines are finer, and little, if 

 at all, granulated. Hence it seems to me not quite identical with the 

 Corallian form. 



Each of the Cornbrash Nerinceas is at present represented by an 

 unique specimen if we except the fragment of a Neriiiceau cast in 

 the Scarborough Museum. 



EXPLANATION OF PLATE IV. 

 Fig. 1. Cerithium (?) caninum, sp.n. Dogger, Blue Wyke. British Museum. 

 ,, \a. Front view of same specimen. 



,, 2. Cerithium (?) caninum, sp.n. Dogger, Blue Wyke. Leckenby 

 Collection. 



1 See Corallian Gasteropoda. 



