40 
B. Toxoglossa. Lingual membrane with two series of subulate, 
elongate, often barbed, lateral teeth (fig. 13). 
Fam. 22. Conrpz. Teeth barbed; mantle enclosed ; operculum 
ovate, nucleus apical (fig. 13). Conus. 
Fig. 13.— Conus. 
C. Dactyloglossa. Teeth on lingual membrane in seven rows, 
3°1:°3, the central teeth triangular, recurved, 3-toothed ; lateral 
teeth converging, inner conical, recurved, outer large, broad, ovate, 
with numerous long, linear, equal, curved digitations on the upper 
edge (fig. 14). 
Fam. 23. AMpHiIpeRAsip&. Operculum none; mantle lobes ex- 
panded, covering the shell, bearded externally ; shell, edge of outer 
lip inflexed (fig. 14). Amphiperas. 
The black colour on 4. ovwm washes off when in spirits. 
