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propriety, again separated them, and placed them under two distinct 
genera, Balanus and Anatifa , agreeable to the differences which the 
form and structure of their shells seem to point out. 
CLVII. Balanus. A conical multivalve, fixed by its base, and com- 
posed of six articulated valves ; the opening being closed by an oper- 
culum, formed of four valves. 
The Balani are not to be considered among those fossils which are 
frequently found. Bayer figures a Balanite found in the neighbourhood 
of Nuremberg. In France, agreeable to D’Argenville, these fossils are 
of rare occurrence ; nor do I believe they are frequently found in this 
country. They are indeed sometimes found, very small, on the Har- 
wich fossil-shells ; and I possess one of these, which is detached, and so 
small as to be really a proper microscopic object. M. d’Aunone parti- 
cularly speaks of some of these fossils found in the neighbourhood of 
Basle, and Monti discovered them in the mountains near Bologna. Tar- 
gioni also describes those of the hills of Pisa ; and M. Allione mentions 
several specimens found in Piedmont. In the hills of Tuscany they are 
also found, in very considerable numbers ; and even the specimens 
which are found there are said to contain more species than have yet 
been observed in a recent state. It is worthy of remark, that many of 
the Balanites which are found in the arenaceous and calcareous strata of 
the Tuscan hills, still retain a considerable part of their colour. The 
specimens which I possess, of this fossil, are from Tuscany, Piedmont, 
and Maryland ; but none of them are in that state of preservation as will 
allow of ascertaining precisely their specific characters. 
Lamarck appears to have very properly separated from the genus 
Balanus those shells of which he has formed the two following genera, 
and which are composed of the shells which, with their inhabitants, are 
found deeply imbedded in the fat of whales. 
CLVIII. Tubicinella. A regular tubular, not spiral, univalve ; nar- 
rowing towards the base, and truncated at each end. The terminal 
opening circular, with a four-valved operculum. 
