40 SPECIES OF THE SYSTEMA. 
imcarnata of the ‘Fauna Suecica’ (published subsequently to 
that of the ‘ Systema’) is, says Loven, the Psammobia Ferroen- 
sis of the ‘ Animaux sans Vertébres.’ 
Sellina Bonacina. 
In the tin box thus marked in the Linnean cabinet there still 
repose specimens of the T'ellina Donacina(Turt. Dithyra Brit. 
pl. 8, f. 4) of authors, one of them indeed adorned with the 
peculiar colouring recorded in the description. Despite of the 
erroneous reference to Gualtier, who has figured a real Donaa, 
the species has long been determined by naturalists. 
Gellina truncata. 
As our author possessed this species, and only one shell in 
the entire collection (Chemn. Conch. Cab. vol. vi. pl. 10, f. 92), 
the Psammobia pulchella of Lamarck, displays the very peculiar 
division of surface alluded to in the description, there is every 
probability that it was the actual type of the species. The simi- 
larity to T. incarnata alluded to is evidently to the species of 
the ‘ Fauna Suecica,’ not to the Mediterranean one. Strictly 
speaking it is not an elevated line, but an elevation of surface, 
which distinguishes the anterior from the posterior portion. 
Gellina balaustina, 
The typical collection confirms the established identification, 
inasmuch as no other shell than the J'ellina balaustina of au- 
thors (Hanley in Sow. Thes. Conch. vol. i. pl. 56, f. 10) will 
accurately agree with the description. ‘The locality is here 
correct, the authority for it (Fagrzeus) being specified. 
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