138 MOLLUSCA. 
Melania corporosa, Goutp; Proceed. Boston Soc. Nat. Hist., 11. 223. 
June 1847. Expedition Shells, 45. 
Antmat large, head remarkably broad and short; above purplish, 
margined with ochreous yellow; head longitudinally striped with 
black ; beneath ochreous yellow; points of the mantle moderately 
developed, yellow. ‘Tentacles very slender, pale, annulated, black. 
SHELL simple, elongated, rather thin, shining, truncated at tip, of 
a pale chestnut-colour tinted with olive, and becoming paler, so that 
the base and the sutural region are of a wax-yellow colour. ‘The 
strie of growth are rather elevated, regular, and rounded, and these 
are crossed by fine, obsolete revolving lines, so as to give the surface 
a very finely reticulated appearance. The whorls which remain are 
about five in number, moderately convex, separated by a deep, chan- 
neled suture, with an impressed marginal line on each whorl just 
below it. The aperture is less than one-third the length of the shell, 
rather narrow, acute behind and nearly rounded in front. The in- 
terior is livid brown, except the columellar margin, which is pale. 
Length an inch and a half; breadth halfan inch. 
Inhabits the island of Tahiti. Couwthouy. 
Very nearly of the same shape as M. /utosa, but distinguished by its 
clean, shining, minutely reticulated surface, its pale sutural region, 
and its narrower aperture, destitute of the deep brown limbus. 
Figure 161, shell, with the animal; 161 a, front view of the shell ; 
161 4, profile of the aperture. 
Metania Vartnara (Gould). 
Testa elongato-conica, levis, badia (junioribus herbaceis et lineolis 
flexuosis fuscis pictis): spira decollata, anfractibus quatuor ad quin- 
que superstitibus, subplanulatis, ultimo plerumque stras distantibus 
cincto ; sutura marginatd : apertura ovata, teste quadrantem equans. 
