LITUITE. BACULITE. 365 
years ago was imported largely to various parts 
of Europe for architectural purposes.* 
Lituite, 
Together with the Orthoceratite, in the Tran- 
sition Limestone of Oeland, there occurs a cog- 
nate genus of Chambered shells, called Lituites. 
(PI. 44, Fig. 3.) These are partially coiled up 
into a spiral form at their smaller extremity, 
whilst their larger end is continued into a straight 
tube, of considerable length, separated by trans- 
verse plates, concave outwards, and perforated 
by a siphuncle (a). As these Lituites closely 
resemble the shell of the recent Spirula (PL 44, 
Fig. 2), their office may have been the same, in 
the economy of some extinct Cephalopod. 
JBacuUfe. 
As in rocks of the Transition series, the form 
of a straight Nautilus is presented by the genus 
* Part of the pavement in Hampton Court Palace, that of 
the hall of University College, Oxford, and several tombs of the 
kings of Poland in the cathedral at Cracow, are formed of this 
marble, in which many shells of Orthoceratites are discoverable. 
The largest known species are found in the Carboniferous lime- 
stone of Closeburn, near Edinburgh, being nearly of the size of 
a man's thigh. The presence of such gigantic Mollusks seems 
to indicate a highly exalted temperature, in the then existing 
climate of these northern regions of Europe. See Sowerby's 
Min. Con. PL 246. 
