PLATE XVII. 
Fig. 
1 a. Turritella Borsetensis^ sp. nov. Irony-nodule bed, Burton Bradstock. My 
Collection. 
1 h. Variety of the same. MurcMsonse-zone, Bradford Abbas. My Collection. 
1 c. Turritella Dorsetensis. Composite figure drawn from three specimens ; the 
apical and anterior portions from the irony-nodule bed, Burton Brad- 
stock ; median portion from the Murchisonge-zone, Stoford. My 
Collection. (Page 228.) 
2 a. Turritella (Mathilda) abbas, sp. nov. 2 b. The same, apical condition. 
2 c. Variety of the same. All from the concavus-hed, Bradford 
Abbas. My Collection. (Page 230.) 
3 a. Turritella (Mathilda) opalina, Quenstedt. Goncavus-hed, Bradford Abbas. 
3 b. Variety of the same, approaching var. canina. Murchisonse-zone, 
Stoford. Both in my Collection. (Page 231.) 
4. Turritella (Mathilda) opalina, var. canma^ Hudleston. Dogger, Blue Wyke. 
British Museum. (Page 232.) 
5. Turritella (Mathilda) strangulata, sp. nov. Goncavus-hed, Bradford Abbas. 
My Collection. (Page 233.) 
6. Turritella (Mathilda) quadrivittata, Phillips. Dogger, Blue Wyke. My Col- 
lection. (Page 233.) 
7. Turritella (Mathilda), cf. binaria, Heb. and Desk Neighbourhood of Bea- 
minster. My Collection. (Page 234.) 
8. ^ Gerithinella cingenda, Sowerby. Dogger, Blue Wyke. British Museum. 
9. Pseudomelania procera, var. minor, Deslongchamps. ParJcinsoni-zone, Burton 
Bradstock. My Collection. (Page 238.) 
X. Mathilda, cf. eughjpha, Laube. Upper Lias, Heyford. Crick Collection. 
Magnified ; apex largely magnified. (Footnote, page 235.) 
N.B. — All other species figured in this plate are natural size, with one whorl 
enlarged. 
^ Possibly the type-specimen of Turritella cingenda. Sow. Subsequently this was regarded as a 
Nerinsea {vide Hudleston, ‘ Greol. Mag.,’ dee. 3, vol. i (1884), p. 112, pi. iv, fig. 9). For an account 
of Gerithinella see p. 186 of the present work. 
