ALVANIA (AOINOPSIS) CANCELLATA. (319 



doubt by AVood from the Coralline Crag of Sutton seems to have been a different 

 species. ^1. reticulata has been found by Sign. (yeruUi-Irelli at Monte Mario, 

 and is given by Seguenza from various Pliocene and Pleistocene localities in 

 Italy and Sicily. Dr. Scalia reports it also from the sub-Etnaen beds of Nizzeti 

 near Catania. 



Snh-genns ACINOPSIS, Monterosato, 1884. 

 Alvania (Acinopsis) cancellata (Da Costa). Plate L, fig. 42. 



1779. Tiirho cnncellatus, Da Costa, Brit. Conch., p. 104, pi. viii, figs. 6, 9. 



1799. Turho cimex, Donovan (not Linnc'), Brit. Shells, vol. i, pi. ii, fig. 1. 



1853. Rissoa crenulata, Forbes and Haulev, Brit. Moll., vol. iii, p. 80, pi. lxxi.x, figs. 1, 2. 



1859. Rissoa cretudata, Or. B. Sowerl)y, 111. Ind. Brit. Shells, pi. xiii, fig. 8. 



1867—84. RIssna cancellata, Jeffreys, Brit Conch., vol. iv, p. 8, 1867; vul, v, p. 207, pi. Ixvi, fig. 3, 



1869; R. {Ahania) cancellata, Proc. Zool. Soc, p. Ill, 1884. 

 1874 — TQ. Rissoa (Alvania) cancellata, Seguenza, Boll. R. Com. Geol. Ital., vol. v, p. 4, no. 372; 



p. 282, no. 129, 1874; vol. vii, p. 102, no. 680, 1876. 

 1884. Rissoa (Acinopsis) cancMata, Bucquoy, Dantzenberg et Dollfus, Moll. mar. Rouss., vol. i, 



p. 294, pi. xxxiv, figs. 18—21. 

 1890. Rissoa cancellata, A. Bell, Rep. Brit. Assoc. (Leeds), p. 420. 

 1892. Alvania cancellata, Locard, Coq. mar. Cotes de Prance, p. 157. 

 1901. Alvania cancellata, Conch. Soc. List, Journ. of Conch., vol. x, p. 14, no. 338. 



1913. Rissoa (Acinopsis) cancellata, Dantzenberg et Diiroiichoux, Peuille des Jeunes Natur., 

 vol. xliv, p. 29. 



1914. Rissoa (Acinop)sis) cancellata, Cerulli-Irelli, Palaeont. Ital., vol. xx, p. 204, pi. xvi, figs. 16 — 20. 



Specific Characters. — Shell small, solid, conical ; whorls G — 7, convex, the last 

 two-thirds the total length ; spire short, turreted ; suture wide, excavated ; 

 ornamented by longitudinal and spiral ribs of equal strength, squarely intersecting, 

 with raised and rather sharp tubercles at the points of contact; base furnished 

 with an angular projection on the columella ; mouth oblong, oval, angulated above, 

 subcanaliculate ; outer lip varicose ; inner lip thickened at the base. 



Dimensions. — L. 5 mm. B. 2 mm. 



Distribution. — Recent: British seas, southern and western; Ireland; Hebrides. 

 Atlantic coast to Madeira, the Azores, and the Canary Islands. Mediterranean, 

 Adriatic, ^]gean. 



Fossil : Selsey, Loch Larne, Portrush. 



Miocene : Azores, Madeii'a. 



Upper Pliocene : Italy — Bologna, Monte Mario. Sicily — Messina. 



Pleistocene : Italy — Reggio, Taranto, San Giovanni, Monteleone, Livorno, 

 Valle Biaia. Sicily — Naso, Messina,. Monte Pellegrino. • 



Remarks. — This characteristically southern form has not been obtained from 

 tlie English Pliocene, either of the Crag or at St. Erth. Mr. A. Bell reports it, 



