PLATE 1. 
FIGS. 
la, 1b. Purpurina calcar, sp.nov. Sowerbyi-bed, Bradford Abbas. My collection. 
(Page 91.) 
2a, 2b. P. inflata, Tawney. Parkinsoni-zone. Burton Bradstock. My collec- 
tion. 1c, apical view. (Page 92.) 
2d, 2e. Thesame. Another specimen. Inferior Oolite, Dorsetshire. My collection. 
2f. The same. Another specimen. I. O., Rodboro’ Hill. Jermyn Street 
Museum. 
3a,3b. P. rotunda, sp. noy. Sowerbyi-bed, Bradford Abbas. Buckman collec- 
tion. + 3c, apical view. (Page 93.) 
3d. The same. Another specimen. I. O., Dorsetshire. Jermyn Street 
Museum. 
4a,4b. P. tabulata, sp. nov. Sowerbyi-bed, Bradford Abbas. My collection. 
4¢, apical view. (Page 94.) 
4d, 4e. Var. of P. tabulata. Sowerbyi-bed, Bradford Abbas. My collection. 
5a,5b. P. (Hucycloidea) bianor, D’Orbigny. Parkinsoni-zone, Burton Brad- 
stock. My collection. X 13. 5¢, apical view X 3. (Page 95.) 
5d,5e. The same. Another specimen. xX 1}. 
5f, 5g. The same. Small specimen. xX 2. Sh, aperture x 4. 
6a,6b. P. (Hucycloidea) “ fusiforme.’ Inf. Ool. “Yeovil.” |Woodwardian 
Museum X 1}. (Page 96.) 
7a, 7b. P. (Hucycloidea) carino-crenata, Lycett. Inferior Oolite. Jermyn Street 
Museum. -X 14. (Page 97.) 
8a, 8b. Brachytrema Wrightti, Cotteau, var. despecta. Parkinsoni-zone, Vitney 
Cross. My collection. x 4. 8c, basal view. (Page 99.) 
9a, 9b. B. sub-varicosum, sp.nov. Lincolnshire Limestone, Great Ponton. British 
Museum. xX 4. (Page 98.) 
10a 100. ? Alaria varicifera, sp. nov. Lincolnshire Limestone. xX 4. See also 
Pl. VII, figs. 8a, &e. 
