PLICATULA. 139 
than the largest of the former, it is at present impossible to trace a passage from 
one to the other. 
Types.—From the Red Limestone of Hunstanton, in the Woodwardian Museum. 
Distribution —Cambridge Greensand. Red Limestone of Hunstanton and 
Speeton. 
PricaTuLa INFLata, Sowerby, 1823. Plate XXVI, figs. 1—11. 
1819. 
PuicaTULA RADIOLA, Lamarck. Anim. sans. Vert., vol. vi, p. 185 
(? partim). 
spinosa, G. Mantell. Foss. S. Downs, p. 129, pl. xxvi, figs. 
13, 16, 17 (non spinosa, Sowerby). 
INFLATA, J. de C. Sowerby. Min. Conch., vol. v, p. 6, pl. 
ececix, fig. 2. 
A, Goldfuss. Petref. Germ., vol. ii, p. 102, pl. evil, 
fig. 6. 
RADIOLA, Lamarck. Anim. sans Vert.,ed. 2 (by Deshayes and 
Milne Edwards), vol. vii, p. 177 (? partim). 
tnFLAta, A. EH. Reuss. Die Verstein. der bohm. Kreideformat., 
pt. 2, p. 37. 
rapioLa, A. d’Orbigny. Pal. Franc. Terr. Crét., vol. ii, p. 
683 (partim), pl. eecelxiii, figs. 1—5 
(non 6, 7). 
spinosa, d’Orbigny. Ibid., p. 685, pl. cecelsiii, figs. 8—10. 
RADIOLA, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 120. 
— R. Kner. Denkschr. d. k. Akad. d. Wissensch. 
Math.-nat. Cl., vol. iii, p. 319, pl. xvui, fig. 9. 
— F. J. Pictet and W. Roux. Moll. Foss. Gres verts 
de Genéve, p. 516, pl. xlvii, fig. 3. 
INFLATA, J. Morris. Cat. Brit. Foss., ed. 2, p. 180. 
RADIOLA, G. Cotteau. Moll. Foss. de l’Yonne, p. 118. 
— ?, J. A. Eudes-Deslongchamps. Mém. Soc. Linn. de 
Normand., vol. xi, p. 103, pl. xvii, figs. 3—8. 
INFLATA ?, Ludes-Deslongchamps. Ibid., p. 100, pl. xvi, figs. 
31—33. 
— F. J. Pictet and E. Renevier. Foss. Terr. Aptien 
(Matér. Pal. Suisse, ser. 1), p. 137. 
— A. v. Strombeck. Zeitschr. der deutsch.  geol. 
Gesellsch., vol. xi, p. 37. 
— — Ibid., vol. xv, p. 109. 
— 4H. Coquand. Mon. Aptien de l’Espagne, p. 159. 
— FJ. Pictet and G. Campiche. Foss. Terr. Crét. Ste. 
Croix (Matér. Pal. Suisse, ser. 5), p. 269. 
— R. Windmiller. Jahrb. a. k. geol. preussisch Geol. 
Landesanst.’ (1881), p. 21. 
