98 BUCCINID^. 



Siib-family Melongeninse. Shell pear-shaped, heavy ; spire and 



canal short. 

 Sub-family Neptuniinse. Shell rather thin, pear-shaped or ovate ; 



canal moderate and twisted. 

 Sub-family Pisaniinae. Shell small, heavy, costato ; canal ver}' 



short and wide, outer lip thickened, dentate within ; columella 



callous or rugose. 

 Sulvfamilj' Buccmince. Shell rather thin, costate or smooth, 



ovate, covered with a hornj" epidermis ; aperture veiy large, 



lip thin, smooth within, terminating below in a short oblique 



notch. 

 Sub-famih' Ehurninse. Shell thick, smooth, ovate-oblong ; deeply' 



umbilicated or umbilicus covered b}' a heavy callus ; outer lip 



simple acute. 

 Sub-family Photinse. Shell small, smooth, costate or cancellate, 



ovate or turreted, thick ; outer lip striate within ; canal short 



and Avido, columella twisted below. 



Synopsis of Oeneru. 



Sub-Family MELONGENINvE, 



MELONGENA, Schum. Shell pyriform, solid, dark colored or banded ; 

 spire short, nodulose, spiny ; aperture oval-oblong ; canal short, open ; 

 columella smooth ; outer \i\) simple. Operculum solid, claw-like, nu- 

 cleus apical. Dentition, PI. 25, figs. 10, 11 ; V\. 26, figs. 12, 13. 



HEMIFUSUS, Swainson. Shell sub-fusiform, uiicolored or light yellowish; 

 spire sliorter than the aperture, jjonderous ; whorls armed with com- 

 pressed si)ines upon the shoulder; aperture long ovate, witli an ascending 

 internal canal at the hind pait, in'oduced into a moderate wide canal 

 anteriorly ; columella smooth ; outer lip simple. Operculum unknown. 

 Dentition, PI. 26, fig. 19. 



[Thdtcheria, Angas. Shell conic with scalariform spire, whorls 

 attenuating to base; growth flexuous, causing a broad sinus on the 

 flattened shoulder of the body-wliorl. No doubt a monstrosity.] 



Sub-Family NEPTUNIIN^. 



NEPTUNEA, Bolten. Shell fusiform, ventricose ; spire elevated, whorls 

 rounded, covered with a horny epidermis, apex papillary ; aperture 

 oval ; canal short ; inner lip simple, smooth. Operculum ovate, nucleus 

 apical. Dentition, PI. 26, figs. 14-10. 



