48 



FUSUS. 



F. protextus. Fusiform ; volutions six or seven ; those of the 

 spire longitudinally costated, and spirally striated; whorls in- 

 dented below the suture ; body whorl short and abruptly round- 

 ed ; beak straight, ami much elongated. 



F. ranuelloides. Short-fusiforrn, with seven rounded volutions, 

 spirally striated, or sulcated ; whorls with two or three broad, 

 rounded costa?, more numerous on the whorls near the apex ; 

 spire and beak nearly equal in length ; body whorl ventricose; 

 labrum creiuilated within. 



Obs. The peculiar disposition of the costae, give this species 

 a resemblance to the genus Ranella. 



F. thallbides. Narrow-fusiform, with rather distant, spiral, ele- 

 vated stria? ; spire subulate, longer than the beak ; superior volu- , 

 tions with obscure longitudinal undulations; aperture small, 

 elliptical; beak straight; channel contracted. 



F. ali-ilitt. Fusiform, inflated, with coarse spiral striae; shoul- 

 der of the body whorl, and base of the whorls of the spire 

 armed with short foliated spines; body whorl with longitudinal 

 undulations ; beak broad, slightly reflected at the base. 



F. expllcatns. Fusiform, destitute of strife; spire short, volu- 

 tions slightly concave, apex papillated ; shoulder of the body 

 whorl, with short foliated spines, which are obsolete on the 

 spine; beak long and slightly reflected at the base. 



F. atctinineus, Fusiform, with spiral striae of different sizes ; 

 volutions, with a single row of short tubercles with a stria pass- 

 ing over the summit of each ; beak rather longer than the 

 spire; reflected. 



F. profu-issus. Short-fusiform, with spiral costae and longitudi- 

 nal undulations; summit of the whorl somewhat indented,; beak 

 * short, thick, reflected ; labrum with dislocated lines on the in- 

 terior surface. 



F. bellnx. Fusiform, with spiral elevated striae and longitu- 

 dinal cbstae ; spine elevated, acute; beak short and reflected; 

 labrum with the submargin thickened, and with short elevated 

 lines ; margin waved. 



F. limulus. Fusiform, Hvith spiral lines alternating in size, 

 and oblique nodiform costae^ vyhich do not extend to the middle 

 of the body whorl ; volutions subangular ; spire elevated, 

 acute ; beak short, reflected ; aperture nearly half the length of 

 the shell. 



F. prorutus. Fusiform, smooth, with seven volutions, a little 



convex, and with an indented line immediately below the suture ; 



spire longer than the beak, which is striated at- the base ; aper- 



, ture more than half the length the shell ; labrum striated within. 



F. decisus. Subfusiform, with about six convex volutions, 



cros'sed by spiral elevated .striae; spire elevated; beak extremely 



