NASSA (AMYCLA) GIGANTULA. 331 



Jeffreys regarded it- as identical with A r . semistriata, hut this view was not 

 accepted by Wood, nor has it been by any subsequent English writer. It belongs 

 to the same group, but differs both in form and sculpture from the partly-striated 

 shell described above, which Bellardi considered the type of that species, 

 approaching more nearly some other allied forms considered by that author to be 

 specifically distinct. 



N. labiosa has not been recorded under that name from any of the Pliocene or 

 Pleistocene deposits of the Mediterranean region, but in 1003, when visiting Sicily, 

 I found at Ficarazzi, near Palermo, a number of fossils which, as stated on p. 73 

 of the present work, I was unable to -separate from it ; one of these I have now- 

 figured (PI. XXXIV, fig. 20) with a similar specimen from Oakley. They are not 

 partly striated as in the typical N. semistriata, but are covered with spiral stria? 

 from the base to the upper whorls. 



A 7 , labiosa is first recorded from the Belgian Crag in the Bolderien (Miocene) 

 deposits of Antwerp (fide Van den Broeck), and in England at the Coralline 

 horizon ; it is very common in the Waltonian, less so in the later Red Crag beds, 

 and seems to have disappeared from these regions before the deposition of the 

 Icenian. 



It is not known from the Pleistocene of Great Britain, but if my identification 

 of it with the Ficarazzi fossils is correct, it lingered on to Pleistocene times in the 

 south of Europe. 



Nassa (Amycla) gigantula (Bonelli MS.). Plate XXXIV, figs. 22, 23. 



1825. Buccinum gigantulum, Bonelli, MS. Catal. Mus. Zool. Torino, no. 2919. 

 1882. Nassa gigantula and vars., Bellardi, Moll. Terr. Terz. Piem., pt. iii, p. 142, pi. ix, fig. 11. 

 1901. Buccinum gigantulum, Cossmann, Ess. Paleoconch. compar., vol. iv, p. 212. 

 1911. Nassa semistriata, var., Cerulli-Irelli, Palaeont. Ital., vol. xvii, p. 253, pi. xxiii, figs. 43 — 48. 

 1911. Nassa totistriata, Monteiosato, MS. 



1913-14. Nassa semistriata, var. calabriensis, G-ignoux, Anu. Univ. Lyon, n.s. [1], vol. xxxvi, p. 512, 

 pi. xv, fig. 7, 1913 ; N. gigantula, Bull. Soc. Geol. France [4], vol. xiv, pp. 329—334, 1914. 



Specific Characters. — Shell much larger than the typical N. semistriata, ovato- 

 conical, longitudinally ecostate ; whorls convex, the last tumid, about half the total 

 length, excavated below ; ornamented throughout by flattened, closely-set spiral 

 ridges, finer on the upper whorls ; suture narrow, channelled ; mouth oval, angulate 

 above ; outer lip rounded, grooved within ; inner lip forming a wide glaze upon the 

 pillar; pillar excavated in the middle; canal wide, short, notched, turning to the 

 left. 



Dimensions— Ij. 20 mm. B. 10 mm. 



Distribution. — Not recorded living. 



Fossil : Wexford gravels. 



