NASSA (NIOTHA) CLATHKATA. 317 



received from my friend Prof. Peyrot, of Bordeaux, I doubt whether the two arc 

 identical, although they belong to the same group. I prefer therefore to regard 

 them as specifically distinct. 



In form and especially in sculpture, which is different from anything else I know 

 from the Crag, our shells seem to agree with one described by me above as A'. 

 Kennardi, to which species I refer them. 



Sub-gtnus NIOTHA, H. and A. Adams, 1853. 

 Nassa (Niotha) clathrata, var. A. (Born). Plate XXXIII, figs. 28—30. 



1901. Nassa (Niotha) clathrata, Cossniaun, Ess. Paleoconch. compar., vol. iv, p. 203, pi. ix, fig. 3. 



1913. Nassa, (Niotha) clathrata, var. ficaratiensis, Grignoux, Ann. Univ. Lyon, n.s. [1], vol. xxxvi, 

 p. 504, pi. xv, figs. 10, 11. 



1914. Nassa clathrata, F. W. Harmer, Plioc. Moll. Gt. Brit., pt, i, p. 66, pi. iii, fig. 3. 



Dimensions. — L. 24—34 mm. B. 14 — 18 mm. 



Distribution. — Fossil : Coralline Crag : Gomer pit, Gedgrave, Boyton. "Wal- 

 tonian : Little Oakley. 



Upper and Lower Pliocene : Italy — Vasto. 



Pleistocene : Girgenti, Castellamare, Monte Pellegrino, Ficarazzi. 



Remarks.— The specimens of N. clathrata (PI. XXXIII, figs. 29, 30) from the 

 Gomer pit and from Boyton respectively, both belonging to the Sedgwick Museum 

 at Cambridge, are apparently the variety A. of Born, corresponding more nearly 

 with Bellardi's figure of that form than with the one given in Part I of this work 

 (loc. cit.). Bellardi shows the present variety to be somewhat longer than the type 

 and less distinctly turreted, the costas and the spiral ridges being more numerous 

 and closely-set. My fig. 23 of PI. XXXIII from Asti represents the typical form 

 of the Italian Pliocene ; our Crag shells seem rather to agree with the variety 

 ficaratiensis of the Marchese di Monterosato, as figured by M. Gignoux. The 

 latter author records this variety from the Calabrian zone of Vasto in the Abruzzi 

 and from the Sicilian of Ficarazzi and Monte Pellegrino. 



The sub-genus Niotha, of which the present species is taken as the type, includes 

 a group of the Nassidre of moderate size, ventricose in form, with a short spire, 

 deep suture, cancellate sculpture, the outer lip not varicose, but thickened and 

 grooved internally ; mouth without a notch at the upper angle as in Hinia, with a 

 large callus on the inner lip. 



Nassa (Niotha) emiliana (Mayer). Plate XXXV, fig. 6. 



1901. Nassa (Niotha) emiliana, Cossmann, Ess. Paleoconch. compar., vol. iv, p. 204. 

 1914. Nassa emiliana, F. W. Harmer, Plioc. Moll. Gt. Brit,, pt. i, p. 67, pi. iv, figs. 5, 6. 



