82 FUSINiE. 



Sub-gen. volema, Bolten (Pugilina, Schum.). 



Shell umbilicated ; spire nodulous ; aperture narrow. 

 Paradisiacus, Reeve. pugilinus, Born. 



Sub-gen. myristica, Swainson. 



Shell subpyriform ; spire strong, spiny, or tuberculated ; aper- 

 ture with an internal and ascending canal ; basal channel 

 wide. 



asper, Mart. bucephalus, Lam. 



bispinosus, Phil. calcaratus, Dillw. 



Genus HEMIFUSUS, Swainson. 



Operculum — ? 



Shell unequally fusiform ; spire shorter than the aper- 

 ture, ponderous, whorls armed with compressed spines ; 

 aperture oblong ovate, with an internal ascending canal at 

 the hind part, produced anteriorly ; columella smooth ; 

 outer lip simple. 



Syn. Cochlidium, Gray. 



Ex. H. tuba, Gmelin, pi. 9, fig. 2. Shell, H. tuba, fig. 

 2, a. 



The animal in this genus has the same elongated 

 head and small tentacles with the eyes at their base 

 as Cassidnlus, but in M. Eydoux's figure no operculum 

 is shown, which in Cassidulus is very large and conspi- 

 cuous. 



