W. S. Hudleston — On the Torkshire Oolites. 251 



certain character to the shell. I do not attach great value to these 

 variations in ornament, although they are just the points which first 

 arrest attention. Yet they differ much in individual specimens. 

 The greater width of spiral angle and the less gaping suture are of 

 more consequence. 



Eecently I have obtained an impression in gutta-percha from a 

 mould of an exterior, which belongs to the Yorkshire Philosophical 

 Society. This specimen exhibits a fine trochiform spire, but without 

 the aperture. The proportions of the spire are nearly the same as 

 in L. uuicarinata, but the ornamentation is bolder, and the shell 

 nearly twice the size. This seems to me the nearest approach to 

 Phillips's figure. 



58.—" Turbo melanioides," Bean MS. PI. VIII. Figs. 12, 12a. 



Description. — Specimen from the Dogger (zone 1), Peak (Blue 

 Wyke). 



Length 23 millimetres. 



Height of body-whorl to entire shell 75 : 100. 



Spiral angle 75°. 



Shell short, turbinate, imperforate. The spire consists of about 

 five whorls, which increase under a regular angle, and are extremely 

 tumid, with a slight flattening of the posterior third. The whorls 

 are smooth. A fine spiral line is noticed on the penult, and there 

 are three on the body-whorl. Of these lines the middle one is 

 situate on the very widest part of the shell, and the area between it 

 and the two other lines is slightly flattened, so as to produce two 

 indistinct flat belts on either side of the centre. There are also 

 other fine spiral lines, and a few rugose longitudinal lines, which may 

 represent lines of growth. 



The aperture is very large, and, if the outline as it now exists is 

 the natural one, must be described as having the inner lip circular, 

 the outer lip angular (see Fig. 12a). 



Belations and Distribution. — This fossil is also unique, but, unlike 

 the last one, its relations are not easy to trace. It is presumed that 

 the peculiar shape of the outer lip is due to compression. If we 

 make the outer lip circular like the inner one (Fig. 12), we should 

 obtain an aperture something like the " Littoriuas " previously 

 described ; but it will be at once observed that the spiral angle and 

 ratio of body-whorl are quite different to what obtains in that group, 

 whilst the spiral lines are against its being a Natica. At present we 

 must be content to let it remain as " Turbo melanioides." 



EXPLANATION OF PLATE VIII. 



EiGS. la, lb. Littorina Phillipsii, Morris and Lycett. Millepore Eock of Clough- 



ton. Leckenby Collection. Front and back view. 

 ,, 2«, 2b. Littorina species, or variety. Dogger, Blue Wyke. York Museum. 



Back view and portion enlarged. 

 ,, 3, Littorina cf. Phillipsii, M. and L. Kelloway Eock, Scarborough. 



Leckenby Collection. 

 ,, 4. Littorina cf. Fhillipsii, M. and L. Oxford Clay, Scarborough. 



Leckenby Collection. 

 „ ba, bh. Amberleya armigera, Lycett. Cornbrash, Scarborough. Leckenby 



Collection. Front and back view. 



