147 
Langius gives the figures of two fragments of two distinct species of 
this fossil ; one of which he describes, Turbinites striatus striis trans- 
versis densioribus et ex parte supeviore in tuber cula abeuntibus a dextru 
ad sinistram convolutus major pullus duarum spirarum. Tab. 32, Fig. 6. 
The other he describes as Turbinites striatus striis transversis, et in 
medio in duplicem papillarum seriem divisis a dextra ad sinistram 
convolutis major pullus unicce spirce. Tab. 32, Fig. 7- These fossils, 
he informs us, were obtained from the mountains in the neighbour- 
hood of Baden, in Switzerland. Hist. Lap. Fig. 8fc. p. 111. Two 
fossils of this species have also been described by Scheuchzer, in his 
Physica Sacra, one of which seems to be entirely different from those 
of Langius ; but the other appears to resemble that of Fig. 7- 
The representations above referred to are mere casts of this shell, 
the shell itself not having been discovered until of late years. This dis- 
covery was made by M. Denis Montfort, who discovered two species in 
the mountain of St. Catherine, near Rouen. One of these he distin- 
guishes as Turrilites tuber culata ; the whirls of the spire being set 
with four rows of tubercles, disposed in quincunx order. This shell 
appears to have been in such a state of perfection as to allow of its 
form being made out completely. It is regularly formed in a spire, 
the whirls of which are projecting and articulated, the foliaceous su- 
tures formed by the edges of the septa being apparent. The opening 
of the shell is nearly round ; the columella flat, without any folds ; and 
the septa perforated, nearly in the centre, by a syphon. The other 
species has the whirls of the spire beset with short ribs, beneath which 
are two rows of tubercles, and appears to resemble the fossil figured 
by Langius, Fig. 6. Journal de Physique, fyc. de Thermidor, An. 7- 
A cast of this rare and extraordinary fossil is represented Plate X. 
Fig. 12, in the superior fractured termination of which may be seen 
the traces of its foliaceous sutures. 
