TURBO. 339 
that, if we should succeed in finding a Paduan shell which, 
whilst undoubtedly that spoken of in his work, should answer 
likewise to the Linnean diagnosis, we may fairly presume it to 
be this puzzling Turbo. Whatever that species may prove, its 
genus will undoubtedly be Paludina in its extended Lamarckian 
signification. 
Gurbo scalarts. 
Thanks to the description and the adequate, though rude, 
figures quoted by Linneus (who did not himself possess the 
then costly species), no difficulty has ever been experienced in 
recognising this beautiful shell, the Scalaria pretiosa of modern 
conchology (Crouch, Introd. Conch. pl. 16, f. 11). “ Ad Tran- 
quebar” follows the “ Habitat” in the Linnean copy of the 
‘Systema.’ 
Turbo clathrus. 
Under this appellation our author has manifestly confused 
two Scalariea, the communis and the lamellosa of Sowerby’s 
Monograph (Thes. Conch. vol. 1.); both these were found mixed 
together in one box in the Linnean cabinet. Should we abide 
by the synonymy of the tenth edition (for the diagnosis, from 
its extreme brevity, might comprehend half the known members 
of the genus) we should find that four out of the seven references, 
Klein, Lister, Bonanni, and the ‘ Fauna Suecica,’ incontestably 
indicate the former; and Plancus was probably intended for the 
same. Rumphius is uncertain: and one only of the two cited 
figures in Gualtier exhibits any approach to the characteristic 
carina of lamellosa. We may fairly, then, regard communis as 
the clathrus of the tenth edition. Although the primitive 
synonymy is retained in the twelfth edition of the ‘Systema,’ 
the S. lamellosa, on the contrary, was there designed, as the 
‘in infimo anfractu versus basin convexa, mediante carinula” 
clearly evidences. In the ‘Museum Ulric’ both are separately 
specified as varieties with and without a keel. Lamarck can 
scarcely be censured, then, for not having preserved the name 
