68 BOOK OF SPECIES. 
large obtuse distant tubercles on the lower margin 
of the whorls; beneath flat, concentrically lineated 
with green ; imperforate. 23...24. W. 30. 110. 
T. oBELiscus. Conic-pyramidal, nodulous 
and granulated, coloured with green and white; 
whorls with many circles of granulations, and their 
lower margin nodulous with tubercles; base white, 
flat, and concentrically striated; pillar grooved and 
twisted ; inside pearly. 2%...2%. W. 30. 109. 
T. vireatus. Conical-pyramidal, sub-in- 
flated in the middle, granulous, with alternate red 
and white longitudinal streaks, and transverse 
granulous strize; beneath flattish concave, trans- 
versely furrowed, and painted with red lines; 
pillar short, arcuated, not prominent; no umbi- 
hieusts: 2.23, ;W.. 0,111. 
T. macuLatus. Conic-pyramidal, nodulifer- 
ous, mottled with green rose-colour and white, 
with transverse thickish noduliferous furrows ; 
beneath flattened ; a false umbilicus, and concen- 
trical lines of granulations spotted with rose- 
colour; lip furrowed; pillar strongly crenulated. 
bot ed: », W. 28, 5. 
T. ziczac. Sub-conical, transversely striated, 
and the body-whorl flattened in the middle ; aper- 
ture roundish, whitish, with longitudinal brown 
zigzac streaks, 3, or bluish black, with the white 
zigzacs interrupted in the middle. 2. Front. 6. 
