242 TF. H. Hudleston—On the Yorkshire Oolites. 



callus : the margin of the aperture elsewhere is crenulated, corre- 

 sponding with the termination of the spiral belts. 



These shells, as is well known, were formerly referred — the 

 majority to Turho, 'some to Trochus ; until certain authors, notably 

 Deslongchamps in France, and Lycett in England, proposed to 

 l^lace them in the Littorine family. The more elongated forms with 

 salient spiral ornamentation were placed under Amherleija, Lycett 

 (= 2Jmc?/c?hs, Deslongchamps), whilst the smaller and less belted 

 species received a location under Littorina. 



This arrangement has generally found favour in England, so that 

 we find Prof. Tate enumerates 10 species of Eucydus and 2 species 

 of Littorina from the Yorkshire Lias. Yet there are some authors to 

 whom it does not commend itself, especially am.ongst Deslongchamps' 

 own countrymen. Terquem and Jourdy, for instance, writing in 

 1869, describe a fossil said to be rather common in one ^ locality 

 under the name of Trochus trispidiis, which is evidently an Amher- 

 Jeya : in the text they give their reasons for dissenting from the 

 views of Deslongchamps. Brauns, writing the same year, adopts 

 Littorina for N. W. Germany. For further remarks on this subject 

 I must refer to the " Corallian Gasteropoda."^ 



The only point for which I contend is, that the group about to be 

 described forms a natural one, and may some day receive a distinc- 

 tive appellation. The difference between the so-called Littorina and 

 Amherleya is one of size and outward ornament most probably, 

 rather than of internal structure. 



49. — Littorina (Turbo) Phillipsii, Morris and Lycett, 1850. 

 Plate VIIL Figs, la, 16. 



1850. Titrbo Phillipsii, Morris and Lycett, Great Ool. Moll. p. 117, pi. 15, 



figs. 12, 12a, \2b. 

 1875. Turbo Phillipsii, L. and M., Phillips, G.Y. 3rd edition, p. 259. 



Bibliography, etc. — The authors described this species as coming 

 from the " Great Oolite " near Scarborough. Phillips in his last 

 edition quotes it from the Cornbrash, Grey Oolite of Scarborough, 

 and Millepore Oolite of Cloughton. Quoted by Wright (Q.J.G.S. 

 vol. xvi. p. 30) from the Gi'ey Limestone, and (vol. cit. p. 15) from 

 the Dogger. Mr. Leckenby's specimens are on a card marked 

 " Millepore Bed, G. L. Scarbro." The matrix would do for either 

 Millepore Kock, or Scarborough Limestone. 



Description. — Specimen said to be from the Millepore Bed. 

 Leckenby Collection. 



Length, full 19 millimetres. 



Height of body-whorl to entire shell 58 : 100. 



Spiral angle 68°. 



Shell very little longer than wide, conical, pointed. Spire com- 

 posed of about 5 whorls, of which the body- whorl is much larger 



1 Bathonian of the Moselle, p. 57, pi. ii. figs. 24, 25. 

 ' Geol. Mag. 1880, pp. 533 and 536. 



