TURBO. 043 
Curbs wba. 
The Pupa wa of Pfeiffer’s Monograph (Wagn. Suppl. Chemn. 
Conch. Cab. pl. 235, f. 4122, 4128), alone of the shells in the 
cabinet of Linneus, who has recorded his possession of the 
species, answers to the definition of this common shell. Three 
out of the four pictorial references have been generally accepted 
as correctly ascribed to it, and the account in the ‘Museum 
Ulrice’ fairly agrees with the examples; Bonanni’s drawing, 
however, has been quoted by Pfeiffer, as illustrative of his 
P. Martiniana. The P. mwmia confounded with it by some of 
the earlier writers is not present in the collection, where the 
only allied form is the P. alvearia, to which the expressions 
“ovata” and “alba” (M. U.) are not applicable. 
Turbo corweus. 
No chance exists of identifying this ambiguous shell, without 
the inspection of the original type in the Dronningen Museum: 
it was probably a Cyclostoma, but even that is uncertain. 
Linneus did not himself possess it, and, since he has not illus- 
trated his meaning by a reference to an engraving, authors 
have not succeeded in clearing away the pristine obscurity 
which involved it. Chemnitz does not notice it; Schréter and 
Dillwyn did not know it; Gmelin merely changed “ testacea” 
to “fusca,” and added “apertura intus alba.” Karsten, a not 
over-skilful conchologist, evidently believed, from the various 
particulars he has mentioned, that he had recognised the 
species: unfortunately his unillustrated details are not suffi- 
cient for the purposes of definition, and consequently do not 
elucidate the Linnean shell. His description runs as follows: 
“umbilicata, ferrugineo alboque undata; anfractus 6 convexi 
decussatim striati; apertura subovata reflexa; fauce subfusca, 
extus lacteo annulata. Long. 9 lin. Lat. 6 lin.” 
