TO GEOLOGY. 153 
Observations. It is with much hesitation I have con- 
cluded to place this curious and truly interesting species 
with the Fusi. It has some of the generic characters of 
the Pyrula, Murex, and I think Monoceres ; for, if I mis- 
take not, the furrow immediately below the last row of 
spines, in perfect specimens, will be found to throw out a 
process very like to that of the genus last mentioned. I 
am induced to place it here from the example of Lam- 
arck’s Fusus minaz, (Murex minaz, Brander). Our shell 
has a striking similarity to that species, and should stand 
next to it wherever it may be placed. It is rather more 
turbinated and has a thicker columella. It is placed at 
the last of the Fusi, having a shorter and more oblique 
canal than those above described. 
Of this widely spread genus fifteen species have been 
observed in England, by Sowerby, and one by Konig. 
Fourteen are in the London Clay, and two in the Crag.* 
M. Deshayes in his Tertiary Tables gives one hundred 
and eleven species. Forty-two of these are from the Paris 
basin, and he gives eight to the English Crag. M. Brog- 
niartt observed in the Formations of Vicentin five species. 
In this country Mr Say has described two species from 
the Tertiary of Maryland, the quadricostatus and cinereus. 
Mr Conrad discovered at St Mary’s a new species, which 
he described under the name of errans, but that name 
being preoccupied, he subsequently changed it to rusticus. 
* Mineral Conch. | Terrains du Vicentin, p. 72. 
U 
