PLATE 39. 
233. 10. MurcHIsonia BELLICINCTA. (Pag. 179.) 
. A small imperfect specimen, preserving the stri# and mesial band in a very perfect manner. 
. A specimen with the striz partially removed, showing the extension of the aperture below. 
. A cast, showing the form of the aperture, which is nearly entire. 
. A fragment of a larger specimen, preserving the striza and mesial band. 
. Cast of a large specimen, the lower volution broken off. 
234, 11. MorcuHisonia sUBFUSIFORMIS. (Pag. 180.) 
2 a. View of the back of the spire; the apex imperfect. 
2 6. View, showing, imperfectly, the form of the aperture. 
2c. A large imperfect individual of this species. 
235. 12. Murcuisonia viTtTata. (Pag. 181.) 
. View of the back of the spire. 3 6. Partial front view, showing a part of the aperture. 
236. 13. MurcHisonia GRACILIs. (Pag. 181.) 
. Fragment showing six volutions. 
. Another fragment, showing one of the lower volutions partially covered by the shell. 
. A small fragment, on which the shell is partially preserved. 
237. 1. SvuBULITEs ELONGATA. (Pag. 182.) 
. Imperfect cast of a large specimen, showing a part of the aperture. 
. A specimen preserving a portion of the shell, and showing the great length of the last volution and 
aperture. 
». A fragment preserving the shell, and showing more distinctly the banded suture 
