LITTORINA LITTOREA. G51 



Remarks. — Specimens under this name have been figured both by Samuel 

 Woodward and by S. V. Wood. They are not identical with the var. sulcata, but 

 belong to the same group, being, however, much smaller, more slender and more 

 strongly sculptured than that variety. 



Var. complanata, nov. Plate LII, figs. 19, 20. 



Varietal Characters. — Shell wide, large, thick and strong ; whorls 5, the last 

 much the largest, three-fourths the total length, fl.attened and angulated above ; 

 ornamented on the lower part of the whorls by fine spiral sculpture, and on the 

 upper by one or two rounded and prominent ridges which are continuous to the 

 apex ; spire short ; mouth very large, projecting ; outer lip thickened outside. 



Dimensions. — L. 24 mm. B. 24 mm. 



Distribution. — Not known living. 



Fossil : Icenian Crag : Bramerton, Thorpe and elsewhere. 



Bemarhs. — Several examples of this fine shell belonging to the carinata gvow^^, 

 but distinct from other varieties of it, have been found by Mr. Jas. Reeve at 

 Bramerton and Thorpe. One of our specimens (fig. 19) belongs to the Sedgwick 

 Museum at Cambridge. 



Var. pyramidata, S. V. Wood. 



1848. Littorina littorea, yax. pyramidata, S. V. Wood, Mon. Crag Moll., pt. i, pi. x, fig. 14/". 



Dimensions. — L. 18 — 22 mm. B. 10 — 12 mm. 



Distribution. — Not known living. 



Fossil: Icenian Crag : Bramerton. 



Remarls. — Belongs to the sulcata group, but having stronger spiral ridges 

 with an elongated spire. 



I am unable to procure a specimen of this rather distinct variety, and must 

 therefore suggest a reference to the one figured by Wood. 



Var. carinata (S. Woodward). Plate LII, figs. 21, 22. 



1833. Turho carinatus, S. Woodward, Greol. of Norfolk, p. 44, pi. iii, fig. 11. 



1848. Littorina littorea, var. carinata, S. V. Wood, Mou. Crag Moll., pt. i, p. x, fig. 14 i. 



1864. Lltorina litorea, var. carinata, S. P. Woodward in White's History of Norfolk, ed. 3, p. 118. 



Varietal Characters. — Having a short pointed spire, with fine spiral sculpture 

 and one or more strong ridges on the body -whorl. 



