MARSHALL: ALTERATIONS IN ‘ BRITISH CONCHOLOGY.’ 27 
retaining the latter name for another group. As the 
difference between these authorities arises as to the correct 
rendering of a deceased author’s (Link’s) German defini- 
tion, it seems inadvisable to change a well-established name 
for one which is in doubt. 
Kellia cycladia 5S. Wood. This was definitively assigned to 
the genus Axvinus by Jeffreys in the ‘Lightning’ Report. 
It is the Porvomya subtrigona of Sowerby’s Index (plate ix.), 
and Kellia cycladia of his Supplementary Plate. Both 
these figures, however, differ from that of ‘ British Con- 
chology,’ and neither of the three are good. Sowerby’s 
figure of Ked/ia cycladia (plate xxv.) is quite unlike, but 
that under the name of Poromya subtrigona (plate ix.) is 
better, and the best of the three. Jeffreys’ figure has the 
beaks too obtuse. 
Artarte sulcata var. incrassata Brocchi (1814) should be 
altered to A. sudcata var. fusca Poli (1791). 
Tapes pullastra Mont. is the northern form of Z. geographi- 
cus Chem., a Mediterranean species. ‘The latter is much 
smaller, and the ‘geographical’ markings which give it its 
name are usually spread over the whole shell, instead of, as 
in ours, being confined to the posterior end ; but they are 
otherwise identical. The proper name for the British form 
should be 7: gcographicus var. pullastra Mont., but in the 
absence of the former species from our ‘coasts, British 
collectors may prefer to retain Montagu’s specific name. 
Solecurtus candidus Renier. Considerable doubt being 
entertained as to this being Renier’s species, recent writers 
have not followed it, but adopted mostly that of S. muddi- 
striatus Scacchi. ‘Turton’s Psammobia scopula, however, 
published in 1822, has priority over all other names. 
Pandora inzequivalvis var. obtusa Jeff. Jeffreys admits 
that this was described by Montagu as Solex pinna, but he 
gives no reason for re-describing it as var. obtusa, and it is 
only right that Montagu’s name should be restored. 
