ARGONAUTA. 153 
lished, for a fuller account of the essential features than was 
consistent with the plan of his ‘Systema.’ No bivalve shell 
will agree with the account there given: “ teste seepius utraque 
sutura coadunate, ut univalvis appareat” may be said of a 
Pteropode, not of a Pinna. No conchologist has determined 
the species; fruitless conjecture has been spared from the ab- 
sence of all synonymy. 
Winna lobata, 
The first and last remarks upon the preceding species relate 
likewise to the present one. It is assuredly not a bivalve, 
scarcely even a Pteropode, though in some small degree it re- 
minds one of a Hyalea. The supposed Pinna (pennacea) 
which succeeded it in the tenth edition of the ‘Systema,’ was 
altogether removed from the Testacea in the twelfth edition, 
and referred to Sepia: it is more than probable that these two 
would have shared its fate, had our author ever revised his 
‘Museum Ulrice.’ 
ARGONAUTA. 
Argouauta Argo. 
In the synonymy of both editions of the ‘Systema,’ as well 
as of the ‘Museum Ulrice,’ the Arg. tuberculosa and A. nitida 
are confused with that shell for which the name Argo has more 
especially been reserved by conchologists. This selection was 
probably based upon the description in the ‘Museum Ulrice,’ 
where “Testa maxima, fragilissima, pellucida: anfractus 
compressi, transversim undulato-plicati, carinati serie duplici 
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