138 CONTRIBUTIONS 
Observations. This species is more completely covered 
with striz than any other here described. On the superior 
part of the shell very minute folds may in some specimens 
be observed. 
This beautiful genus exists in great numbers in a fossil 
state in the superior beds, but has not, I believe, either in 
this country or in Europe, been observed below the Ter- 
tiary. Sowerby describes eleven from the London Clay, 
it being found in England only in that formation. M. 
Deshayes mentions one hundred and fifty-six as existing 
in the Tertiary of Europe. Forty-one are from the Paris 
basin and thirty-three from the Subappennines. In this 
country Mr Conrad is, I believe, the only geologist who 
has noticed the genus. At St Mary’s, Maryland, he dis- 
covered seven species, which are described by him in the 
Journal of the Academy of Natural Sciences, vol. 6, p. 223. 
Neither of these is the analogue of those above described. 
GENUS CANCELLARIA. Lamarck. 
C. babylonica. Plate 5. Fig. 134. 
Description. Shell turrited, inflated, smooth, substance 
of the shell thin ; whorls six, angular, broad and flat at the 
top, and furnished on the angle with irregular erect spinous 
tubes; umbilicus wide, armed with points ; mouth trian- 
gular, two fifths of the length of the shell ; columella with 
two indistinct folds; outer lip sharp. 
Length .5, Breadth .3, of an inch. 
