GASTEROPODA. 33 
four and a half, very little convex, separated by a well-impressed 
suture. 
Diameter seven-tenths of an inch; axis one-third of an inch. 
Found by Mr. Drayton, at Illawarra, New South Wales. 
Its lower face is almost precisely that of H. olivetorum, but the shell 
is more delicate, and the upper surface ridged with elevated lines like 
H. lucubrata, many of which bifurcate, a character I have not observed 
on any other species. 
Nanina scorpio (Gould). 
Testa rotundata, depressa, rubro-castanea, fasciis radiantibus atro-pur- 
pureis tessellata, subtus haud convexa: sptra depressa, anfractibus 
quatuor cum dimidio convezis. 
Helix (Nanina) scorpio, GouLp; Proceed. Bost. Soc. Nat. Hist., ii. 
178. Nov. 1846. Expedition Shells, 24. Preirrer; Monog. i. 431. 
Animat elongated, lilac-coloured, with crimson and purple reflections, 
a very distinct submarginal ochreous line, and with the marginal lim- 
bus radiately wrinkled ; a dark bridle line passes from under the shell 
on the neck, down each side, to the oral tentacles. Tentacles elongated. 
The anal lappet is very long, and besides this, there are six other lap- 
pets, arranged on either side of the median line in three pairs. Surface 
irregularly reticulated. 
SHELL discoidal, ground-colour mahogany, with quadrate tessellations 
of slate-colour. Spire slightly elevated, of about four and a half con- 
vex whorls; not convex beneath. . 
Diameter three-fifths of an inch ; axis two-fifths of an inch. 
Inhabits the Feejee Islands. Drayton. 
The above characters were drawn from the figure of a shell (the 
original not having been found) which looks somewhat like Cyclostoma 
9 
