PLATE XLI. 



N.B. — A feiu figures of Trochotoma in this Plate are drawn from photographs. All 

 specimens are from my Collection unless otherwise stated, and the same applies 

 to the remainder of the Plates. 



Fig. 

 1 a, 1 h. Trochotoma calix, Phillips. Variety from the Cotteswolds, Oolite-marl 

 horizon, Nailsworth Hill. Back and base ; natural size. (Page 445.) 



2. T. gradus, Deslongchamps. A composite figure based on two specimens from 



the Murchisonse-zone, Coker. Back ; natural size. (Page 447.) 



3. The same. Cast in matrix, Coker. 



4. T. affinis, Deslongchamps {■= T. carinata, Lycett). Stoford. Whidborne 



Collection. Back ; natural size. (Page 447.) 



5 a, 5 b. T. funata, Lycett. Pea-grit, Nailsworth Hill. Back and front ; natural 



size. (Page 450.) 



6 a — c. T. calix, Phillips. The Dogger, Blue Wyke. York Museum. Base, 



apical and back ; natural size. (Page 445.) 



7. The same. Portion of another specimen from the Dogger; magnified. 



8. T. Lindonensis, sp. nov. Base-bed, Lincoln (Murchisonse-zone). Back X 1|. 



8 a, portion X 7. (Page 449.) 



9. The same. Basal aspect of a larger specimen from the same place X 1^. 



10. T. depressiuscula, Lycett. Parian soni-zone, Midford. Back ; natural size. 

 (Page 448.) 



11 a, 11 h. EmarginuJa Lechhamptonensis, Lycett. Pea-grit, Leckhampton. Side 



and apical X 5. (Page 452.) 



12 a, 12 h. E. scalaris, Sowerby. (Worn specimen.) Lincolnshire Limestone, 



Spittlegate quarries. Apical and side X 5. (Page 451.) 



13 a, 13 h. Emarginula, species or variety. Lincolnshire Limestone, Stoke 



Lodge. Apical and side X 5. (Page 453.) 



14 a, 14 h. E. Lindonensis, sp. nov. Base-bed, Lincoln. Side and apical X 5. 



(Page 452.) 



15 a, 15 /;. Bimula clathrata, Sowerby. (Lincolnshire Limestone variety.) Stoke 



Lodge. Apical and side X 5. (Page 454.) 



16 a, 16 h. B. ritgosa, sp. nov. Base-bed, Lincoln. Side and apical X 5. 



(Page 454.) 



17 a, 17 b. B. subfricarinata, sp. nov. Pea-grit, Leckhampton. Side and apical 



X 15. (Page 455.) 



18 a, 18 b. B. alta, Lycett. Inferior Oolite of the Cotteswolds. Jermyn Street 



Museum. Side and apical X 5. (Page 455.) 



19 a — c. Punctiirella cL acwfrt, Deslongchamps. Pea-grit, Leckhampton. Three 



aspects X 15. (Page 457.) 



