RAPHITOMA SIMILIS. 259 



Specific Characters. — Shell strong, ovato-f usiform ; Avliorls 7, convex, obscurely 

 carinate, the last about two-thirds the total length ; ornamented by about fourteen 

 smuous costa3 on the upper whorls and eight to ten on the last, reaching the base of 

 the shell, intersected by fine thread-like and rather distinct spiral lines; suture 

 slight ; mouth long, narrow, acutely angulate above, continuous with a short canal, 

 which bends slightly to the left ; outer lip gently rounded, not expanded ; columella 

 fairly straight. 



Dimensions. — L. 14 — 18 mm. B. 5 — 7 mm. 



Bistrihution. — Not known living. 



Fossil : Waltonian Crag : Little Oakley. 



Upper Miocene : Italy, Stazzano. Vienna basin. Lower Pliocene : Castelnuovo 

 d'Asti, Savona, Albenga. Upper Pliocene : Monte Mario, Orciano, Bologna, 

 Altavilla, Biot. 



Bemarlcs. — I have one specimen from Oakley, perfect though worn, which, 

 though somewhat smaller than the Italian fossil, I refer with some doubt to the 

 same species. It is specially characterised by having fewer longitudinal costse on 

 the last whorl than on the upper ones. Our Crag shell agrees more nearly in form 

 and sculpture with Bellardi's figure and with a specimen in my collection from the 

 Rio Torsero, near Albenga, than with that given by Homes under the same name. 



Raphitoma similis (Nyst). Plate XXIX, figs. 28, 29. 



1872. Pleurotoma Jiis2)idula, S. V. Wood, Mou. Crag Moll., 1st Suppl., pt. i, p. 42, pi. iii, fig. 3. 



1881. Pleurotoriia similis, Nyst, Couch. Terr. Tert. Belg., p. 55, pi. iii, fig. 19. 



1912. Phuroto7na siviilis, TescL, Med. v. d. Eijks. v. Delfstoffen, pt. iv, p. 90, no. 230. 



Specific Characters. — Shell elongato-f usiform ; whorls 7, slightly convex, not 

 distinctly carinate, the last much the largest, two-thirds the total length ; 

 ornamented by many rather inconspicuous longitudinal ribs, which tend to die 

 out towards the base of the shell, and by fine, closely-set thread-like spiral lines, 

 giving it a faintly decussated appearance ; mouth fairly long, oval, angulate 

 above, nearly equalling the spire in length ; outer lip thin ; inner lip smooth and 

 polished; canal short, open. 



Dimensions.— -h. 14 — 18 mm. B. 5 — 7 mm. 



Disfribiifion. — Not known living. 



Fossil : Coralline Crag : Gomer, Boy ton. Waltonian : Little 

 Oakley. Icenian : Aldeby. Scaldisien : Belgium, Holland. 



Remarlcs. — This species originally described by Nyst, which, as far as I know, 

 has only been observed in the Crag of the Anglo-Belgian basin, is probably the 

 same as the one figured by Wood as P. lusjridiila {op. cit.). Although belonging 

 to the same group, it presents certain well-marked differences which entitle it, I 



