446 SPECIES OF THE SYSTEMA. 
receives the name of lwmbricalis in most publications (Reeve, 
Conch. Syst. vol. ii. pl.152,f.1). I regard the drawing of Lister, 
the reference to which was changed in the revised copy to “548, 
f. 1,” its modern equivalent, as a more characteristic figure of 
the same shell; the three keels are exhibited as developed upon 
two or three coils only. In his revised ‘Systema’ our author 
has also cited a coloured copy of it in Martini’s great work 
(vol. i. pl. 2, f. 12, B); both these engravings have been quoted 
by Deshayes for his V. tricarinatus. I consequently regard the 
latter as the S. lumbricalis of Linneus, and suggest the name 
of Adansoni for the V. lumbricalis of Lamarck. Little addi- 
tional information is to be gained from the details of the ‘ Mu- 
seum Ulrice.’ The “quasi cornea, teres seu versus apicem 
obsolete angulata” is not, however, inapplicable to ordinary 
examples. 
Servpula polythalamta. 
In the revised ‘Systema’ our author has proposed to transfer 
this species to Zeredo, has written “intercepta” in place of 
“interrupta,’ and has referred, likewise, to Martini’s copy 
(Syst. 40, t. 2, f.6”) of the cited figure of Rumphius. As the 
description, in the main, corresponds with the characters of the 
quoted illustration, which represents the Septaria arenaria of 
Lamarck, that shell has almost universally been recognised as 
the Linnean species. In one point only there might seem a 
discrepancy between the features mentioned by the two natu- 
ralists. Linneus has declared the septe (or divisional walls) 
to be entire (“non perforatis”): Lamarck, on the contrary, has 
affirmed that the majority of them are incomplete. As the 
illustrious French systematist does not by this assertion deny 
that some of them may be entire, the apparent difference may 
depend upon the perfection of the specimens, which are so very 
rarely obtained in a perfect condition that I cannot call to mind 
a single individual which possesses externally the antenne-like 
terminal tubes depicted in the Dutch publication. 
Nothing in the Linnean cabinet suits the definition of this 
species: the size of the drawers, indeed, would not permit the 
presence of a perfect example. 
