1458 CONTRIBUTIONS 
described, but may be distinguished by its larger folds and 
the transverse striz, which, though numerous over the 
whole shell, are not so closely set. In some specimens 
on the folds there is a slight imbricate appearance. 
F. Delabechii.* Plate 5. Fig. 151. 
Description. Shell subfusiform, furnished with rather 
sharp longitudinal folds cut by imbricate transverse strie ; 
substance of the shell thick; spire somewhat elevated, acute 
at apex; whorls seven, subangular; canal short, flexed ; 
mouth subangular ; outer lip crenate, within striate. 
Length 13-20ths, Breadth .3, of an inch. 
Observations. This species in many of its characters 
resembles the two last described. It may be known, 
however, by its imbricate striz and obtuse angle on the 
superior part of the whorl where the folds are somewhat 
pointed. A single perfect and mature specimen only has 
been observed by me. , 
F. ornatus. Plate 5. Fig. 152. 
Description. Shell fusiform, furnished with rather 
oblique folds on the middle of the whorls, transversely, 
very minutely and alternately striate ; substance of the 
shell thin; spire rather elevated, pointed ; whorls seven, 
subangular ; canal rather short, obliquely curved ; mouth 
subangular ; outer lip sharp. ’ 
Length .6, Breadth 5-20ths, of an inch. 
* Named after the distinguished author of the “‘ Geological Manual,” 
“Tabular View,” &c., De la Beche. 
