NATICA. 255 
192. “ PaasianeLta” cf. sunumpinicata, D’Archiac, 1843. Plate XIX, fig. 15. 
1843. Narica supuMBILIcatTa, d’Archiac. Mém. Soc. Géol. France, vol. v, 
p. 378, pl. xxviii, fig. 11. 
1852. PHastaneELLa — @Orbigny. Terr. Jur., ii, p. 321, pl. ecexxiv, 
figs. 8—10. 
1884. — — @ Archiac, sp. Cossmann, Et. Bath., p. 254. 
Description of the specimen : 
Spiral angle : = 60°: 
Height of body-whorl = entire shell : « 6095 100; 
Length ‘ . 14mm. 
Shell short, ovate, slightly fureite. whorls five or six, smooth, narrow, tumid, 
and slightly disposed in steps. Body-whorl very large and rounded, but not 
exceeding the limits of the spiral angle. Aperture subcircular to oval; indica- 
tions of an umbilical groove. 
Relations and Distribution.—This form is first cousin to Natica subumbilicata, 
D’Archiac, from which it differs in its larger habit of growth, in the greater height 
of the spire, and in its less globose outline. It belongs to a section of “ Phasianella”’ 
which has a general resemblance to the Jurassic Naticas. A single specimen from 
the Lincolnshire Limestone, Weldon. 
193. ‘* PHASIANELLA,” species or variety. Plate XIX, fig. 17. 
Description of the specimen : 
Spiral angle : ‘ at *O0rs 
Height of body-whorl to entire shell ; - 40% 100: 
Length : : 4 . omm. 
This micromorph, of which gaily a single specimen is in my possession from the 
Lincolnshire Limestone of Weldon, presents characters not dissimilar to those of 
Ph, Leymeriei, D’ Archiac, and it also has some resemblance to the larger species, 
Ph. nuciformis, Morris and Lycett. 
Family—NATICIDA. 
© Shell turbinate or ear-shaped ; aperture entire, columella thickened or callous ; 
lip thin . . . .”—FISCHER. 
There are a considerable number of shells in the Jurassic rocks which may 
safely be referred to the Naticide. Their generic grouping, however, 1s not quite 
