Fia. 
. Monodonta Lyelli, @Archiac. Lincolnshire Limestone, Weldon. Back and 
PLATE XXX. 
N.B. 1. All the figures on this plate ave drawn from photographs. 
N.B. 2. All specimens are from my Collection unless otherwise stated. 
N.B. 3. All figures magnified about two diameters. 
front (Page 357.) 
. The same ; variety with shorter spire. Same horizon and locality. Back. 
. Monodonta Lyelli, var. humilis. Lincolnshire Limestone, Ponton or Barnack. 
British Museum. Back and front. 
. Turbo “ depressiuscula.” Lincolnshire Limestone. Same Collection. Back. 
(Page 358.) 
. Turbo “ spathica”’ (cf. T. delphinuloides, V Archiac). Lincolnshire Limestone. 
Same Collection. Back and front. (Page 359.) 
. Turbo Davoustii, V Orbigny, var. Lindonensis. Base of Lincolnshire Limestone, 
Lincoln. Back. (Page 361.) 
- Turbo Davoustii, dOrbigny. Parkinzoni-zone, Aston. Back and front. 
(Page 360.) 
. Delphinula alta-bicarinata, sp. nov. Base of Lincolnshire Limestone, Lincoln. 
Front and back. (Page 362.) 
. Delphinula alta-acanthica, sp. nov. Same horizon and locality. Back and 
front. (Page 363.) 
. Delphinula alta-acanthica, var. depressa. Same horizon and locality. Back 
and front. (Page 363.) 
. Delphinula Buckmanni, Morris and Lycett. Oolite Marl, Nailsworth. Front 
and back. (Page 364.) 
. Turbo (Delphinula) Shaleri, Tawney. Concavus-bed, Bradford Abbas. Back 
and front. (Page 365.) 
. Delphinula or Turbo, species or variety. Inferior Oolite, Dorset. Front and 
back. (Page 366.) 
. Delphinula Shaleri, var. pulchior. Stoford. Back and front. (Page 366.) 
. Delphinula angulata, sp. nov. Murchisone- or concavus-zone, Half-way 
House. Back and front. (Page 367.) 
. The same; depressed variety. Opalinus-zone, Drympton. Front and back. 
. Delphinula (Turbo) granata, Hudleston. Dogger, Blue Wyke. Front and 
back. (Page 368.) 
18a. Delphinula (Turbo) Santonis, sp. nov. Lincolnshire Limestone, Santon. 
Jermyn Street Museum. Back and front. (Page 369.) 
