Mr. S. V. Wood's Catalogue of Shells from the Crag, 533 



Cor. Crag. Red Crag. Mam. Crag. Recent. 



1. Turbo ? sphseroidea, n. s. 



Sutton. [ I I 



Spec. Char. Spheroidal; whorls three, rapidly enlarging, convex ; 

 suture deep, spirally striated ; peritreme sharp; outer lip curved; um- 

 bilicus surrounded by a prominent keel ; shell nacreous. Axis one- 

 twentieth of an inch. PI. V. f. 3. 



The exterior is covered with six or seven raised striae or ridges un- 

 equally distributed, being nearer together at the lower part of the 

 volution, where one is elevated into a sort of keel that surrounds the 

 umbilicus, within which it is naked. The figure appears rather too 

 elongated. 



1 . Rissoa Zetlandica (Cyclostreraa Zetlandica, Flem. Brit. An. p. 312. 



Turbo Zetlandica, Mont. Linn. Trans, xi. t. 13. f. 3). 

 Sutton. ( I I Zetland. 



2. — reticulata (Turbo reticulata, Mont. Test. Brit. p. 322. t. 21. f. 1. 



Cingula reticulata, Flem. Brit. An. p. 306). 



Sutton. I I I Britain. 



3. — semicostata (Turbo semicostatus, Mont. Test. Brit. p. 326. 



t. 25. f. 5. Turbo semicostatus. Woodward, Geol. of Nor/. 

 t. 3. f. 19. Cingula semicostata, Flem. Brit. An. p. 307). 

 I Sutton. I Bramerton. | Britain. 



4. — subumbilicata (Turbo subumbilicatus, Mont. Test. Brit.^^. 316. 



Turbo minutus. Woodward, Geol. of Nor f. t. 3. f. 20). 

 I j Bramerton. | Britain. 



Axis three- sixteenths of an inch. 



5. — supracostata, n. s. 



Sutton. I I I 



6. — crassistriata, n. s. 



Sutton. I I I 



7. — obsoleta, n. s. 



Sutton. I I I 



8. — confinis, n. s. 



Sutton. I I I 



9. — concinna, n. s. 



Sutton. I I I 



10. — ? costellata, n. s. 



Sutton. I 1 I 



11. — ? angusta, n. s. 



Sutton. I I I 



The above small shells are occasionally much eroded, and their ex- 

 terior markings sometimes obliterated ; this is often the case with 

 recent shells found in sand, where attrition, produced by the move- 

 ment of the waves, has removed the striae and other distinguishing 

 characters ; there is in consequence a doubt of the correctness of 

 these identifications. 



