MARSHALL : ALTERATIONS IN ‘ BRITISH CONCHOLOGY.’ 31 
quently as Delphinula duminytz. Although the animal is 
not known, Jeffreys had suggested that it should form a 
section of Zrochus under the name of Crrculus, which has 
since been adopted as a generic name by Monterosato and 
others, perhaps prematurely. As it was necessary, how- 
ever, to alter the name, and as Zyochus striatus is already 
occupied by a well-known Linnean species, the alteration 
to Circulus striatus is perhaps the best that could have been 
adopted. It should be placed provisionally between 
Cyclostrema and Trochus until the animal becomes known. 
T. glaucus Moll. Moller described his Margarita glauca 
in 1842, but Brown described its. fossi! representative as 
T. olivaceus in 1827, so that the latter name must stand. 
Brown’s type is a fossil of the Clyde beds. It is the 
Margarita argentata of Gould (1841), and AZ. harrisont of 
Hancock (1846). 
T. amabilis Jeff. This was originally described by Philippi 
as ZT: cinctus as long ago as 1836 for a fossil shell, and ~ 
must therefore take the place of Z: amabilis. It is also the 
Solariella maculata of Searles Wood, from the Coralline 
crag. Jeffreys erred in describing it as new because these 
fossil typical specimens are ‘‘ usually marked with an irregu- 
lar row of reddish spots, which are not observable in the 
recent form.” 
T. millegranus Phil. This specific name is long subsquent 
to 7: miliaris Brocchi, and the latter should take precedence 
according to the strict law of priority, although it is quite 
true that “the specific name mz/zaris is not appropriate if it 
has. reference to millet-seed, nor is it a Latin word.” 
(Jeffreys, ‘ Lightning’ Report). 
Rissoa cancellata var. paupercula Jeff. I do not think 
this variety should hold a place any longer in the British 
List on the strength of ‘a dead and worn specimen found 
at Herm.” 
