= 
MONODONTA. TURBO. 71 
M. mopuuvus. Sub-orbicular, obliquely de- 
pressed, transversely striated, and obsoletely plait- 
ed longitudinally, whitish, with scattered purple 
spots; the lower face concentrically furrowed, 
umbilicated; both rather prominent; diam. ,%. 
W. 29. 71. 
M. taBseo. Ovate-conic, thick, ventricose, 
imperforate, with transverse rows of beads, and 
spotted with red and black; wrinkles nodulous ; 
lip double, white, furrowed within. 12... 14. 
W. 29. 80. 
TURBO. 
Conoid, or sub-turreted, circumference never com- 
pressed ; aperture entire, round; margin of 
outer lip disunited; columella arcuated, de- 
pressed, but not truncated at its base ; a testa- 
ceous operculum. 
T. aRGyRostomus. Obsoletely perforate, sub- 
ovate, with transverse ribs, which are somewhat 
alternately larger and longitudinally wrinkled ; 
yellowish ash-colour, with reddish-brown or 
greenish stains; mouth silvery; diam. 23. W. 
als7/6. 
T. curysostomus. Sub-ovate ventricose, 
imperforate, transversely furrowed, and wrinkled 
longitudinally ; yellowish ash-colour, sub-radiated 
with longitudinal reddish-brown flammules; cer- 
tain of the furrows armed with vaulted and ele- 
