
51 
MELANIA ANNULIFERA. 
PLATE VIll—Fig. 2, 
DESCRIPTION. 
Shell elevated-subconical, with flattened whorls 
and elevated distant ribs, alternately smaller; about 
five on the body*whorl and three on the adjoining 
one; suture obsolete; colour generally blackish exte- 
riorly and dark purple within. 
OBSERVATIONS. 
inhabits with the preceding species, from which it 
differs in being less ventricose, and having the ribs 
plain; the aperture is shorter than in the preceding. 
MELANIA SALEBROSA. 
PLATE IV. Fig. 5. 
DESCRIPTION. 
Shell short, suboval, thick, ventricose, witha series 
of very elevated nodes on the shoulder of the body 
whorl, and generally two series of smaller nodes be- 
neath; spire very short; apex much eroded; aperture 
about half the length of the shell, contracted; within 
purplish; columella with a callus above, and another 
near the base. . : 
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