PLA.TE XXIII. 



Fig. 



\,o,h. Crassatella compressa (var./^ew?27a«), Edwards, j». 165. Brook, 



•2,a,b. „ tenuisulcata, Edwards, /?. 171. Barton. 



;3. „ sinuosa, Lamarck, JO. 168. Bracklestiam. 



A:, a, I). „ sulcata (var.yr<a!flfefe),jy. 171. High Cliff. 



Q,a,b. „ compressa, Lamarck, jy. 164. Huntingbridge. 



&,a,h. ,, Sowerbyi, Edwards, j». 169, Stubbington. 



l,a,h. ,, sulcata (var. e^s«/brm,§),jO. 170. Barton. 



S,a,/j. ,, Grignonensis, Deshayes, JO. 166. Bracklesham. 



9. ,, sinuosa ? Lamarck,/). 168. Barton. 



l{),a,6. „ Grignonensis (var. An(/Iica), p. 166. High Cliff". 



11, « — c. „ sulcata, Solander, /». 170. Barton. 



\'l,a,/). „ subquadrata, Edwards, /). 169. a. White Cliff" Bay. b. Barton. 



IS, a — c. ,, ^owerbyi (yar. Hanfoniensis), p. \Q9. Brockenhurst. 



lA,a,li. ,, plicata, J. Sowerby, j!?. 167. Bracklesham. 



15, « — c. ,, gibbosnla, Deshayes, /). 165. Bracklesham. 



