W. H. Hudleston—The Yorkshire Oolite. 487 
26.—Nerin©js Moreana, D’Orbigny, 1841. Pl. XVI. Figs. 8a, db. 
Nerinea Moreana, D’ Orbigny, 1841, Revue Zool. p. 319. 
Idem, 1850, Terr. Jurass. vol. 1. p. 100, pl. 257, figs. 1 and 2. 
Nerinea Clymene, D’ Orb., op. cit. p. 102, pl. 258, figs. 1 and 2. 
Nerinea Moreana, D’ Orb., 1852, Buvignier, Statis. Géol. de la Meuse, p. 34. 
Nerinea tornatella, Buv., op. cit. pl. xxiv. figs. 10-13. 
Bibliography, etc.—This fine and highly characteristic species seems 
early to have attracted the attention of D’Orbigny, who received 
specimens from many parts of the Corallian of the Hast of France. 
His figure portrays a specimen of unapproachable excellence. 
Buvignier’s figures are more like our Yorkshire shell. His fig. 11, 
for instance, is very like the specimen here figured, and in his fig. 13, 
we at once recognize the peculiar smoothed and rolled forms so 
frequent in the Coral Rag of Brompton and Ruston. It is quite 
possible that Buvignier was justified in regarding N. Clymene, 
D’Orb., as a rolled and worn condition of the above. The name 
tornatella, given by lim in 1850, would have been more satisfactory. 
Description.— Specimen from the Coral Rag of North Grimston 
(Strickland Collection). 
pPieam eth: (HCG ROTOU 2 sinh sco cach cielo sropn'® sisiehel ohare dia’ 92 millimetres. 
eg Fe ors ale ajay api shai sida Oa aiglalia Sets Saas 3 ae 
Length of last whorl to entire shell .......... 45 : 100. 
Spirallantleaveragey J544.As ce txavee ts Ase P 25°. 
Shell elongated, bottle-shaped, subturrited, umbilicated. Probable 
number of whorls twelve. These increase with tolerable regularity 
under an angle of about 25°. The posterior whorls are smooth, 
convex, and devoid of ornament. The two whorls posterior to the 
penultimate develope a varix, which in the penultimate becomes 
stronger. Finally, the body-whorl exhibits a large and sudden 
increase, which is like the reinforcement in the breach of a cannon. 
These last two whorls are subangular. The varices, especially the 
upper varix of the body-whorl, appear to have supported nodular 
prominences, which have been reduced by wear. Shell substance 
thick. Umbilicus narrow, but probably deep. Aperture greatly 
elongated. Outer lip curved, and only moderately compressed. The 
folds on the columella are well seen. 
Relations and Distribution.—The most unlike a Nerinea of the 
whole group, which seems to be in a great measure Corallian, is 
a shell originally described by D’Orbigny as an Acton. From this 
extraordinary form to the more elegant N. fusiformis there seem to 
be certain gradations, of which N. Moreana may be taken as a sort 
of average, accepting Buvignier’s figuring rather than D’Orbigny’s 
for the type. In Yorkshire Sir Charles Strickland’s specimen is by 
far the finest known to me. In the Coral Rag of Brompton and 
Ayton the general run of specimens is narrower, and, if possible, 
more bottle-shaped from the sudden reinforcement of the body- 
whorl. Between this variety and Nerinea fusiformis there seems to 
be every stage, so that when the specimens are fragmentary it is 
difficult to come to a decision. The majority, however, show con- 
siderable traces of an umbilicus, whereas we have seen that N. fusi- 
formis is not umbilicated. 
