PLATE VIII. 



Pig. 

 1. Cerithium quadrilineatum, Rom. Blue Wyke Sands. My collection. (Page 



145.) 

 2 a. Cerithium muricatum, Sow. Dogger, Blue Wyke. One of Sowerby's types, 



British Museum. (Page 146.) 

 2 b. The same. Group of shells in Dogger matrix. My collection. 



3. Cerithium muricatum var. trilineata. Scarborough Limestone. York 



Museum. (Page 147.) 



4. Cerithium gemmatum, Morris and Lycett. Scarborough Limestone. British 



Museum. (Page 147.) 

 5 a, 5 b, 5 c. Cerithium vetustum, Phil. Scarborough Limestone, Pickering Cliff. 

 My collection. (Page 148.) 



5 d. Variety. Leckenby collection. 



6 a. Cerithium vetustum-majus, Hudl. Dogger, Blue Wyke. My collection. (Page 



150.) 

 6 b. The same. Leckenby collection. 

 7. Cerithium vetustum var. seminuda, Hudl. Dogger, Blue Wyke. Leckenby 



collection. (Page 151.) 

 8 a—f. Cerithium subscalariforme, D'Orb. var. spinicostata, Wright, MS. 



Sowerbiji-bed, Bradford Abbas. My collection. (Page 151.) 

 9. Cerithium subscalariforme, D'Orb., var. in the Humphriesianus-zone, Oborne. 

 My collection. (Page 153.) 

 10 a. Cerithium subscalariforme, D'Orb., var. in the Parlcinsoni-zone (? granulato- 



costatum, Mimst.). Grove near Castle Cary. (Page 153.) 

 10 b. The same from another locality. My collection. 



11. Cerithium subabbreviatum, D'Orb. P l5 Burton Bradstock. My collection. 



(Page 154.) 



12. ? Cerithium obesum, sp. nov. P ls Vitney Cross. My collection. (Page 154.) 



13. Cerithium subglabrum, sp. nov. Sowerbyi-bed, Bradford Abbas. My collection. 



(Page 155.) 



14. Cerithium, species or variety. Sowerbyi-hed, Bradford Abbas. My collection. 



(Page 155.) 



15. Cerithium, species or variety. Sowerbyi-hed, Bradford Abbas. Whidborne 



collection. (Page 156.) 



