30 MOLLUSCA. 
infra glaberrima, livido-castanea, ad centrum dechvis: spira anfrac- 
tibus sex convexis, amplis ; sutura submarginata: apertura semiluna- 
ris ; fauce livida ; labro simplici, ad columellam reflexo, albo. 
Helix (Nanina) rubricata, Goutp; Proceed. Boston Soc. Nat. Hist., 
ii. 178. Nov. 1846. Expedition Shells, 25. 
Anima corpulent, the back and the two lobes of the mantle with 
bright crimson reflections, the sides shaded with lilac, darker on the 
neck, where there is a distinct, central white line passing over the head 
between the tentacles, and two oblique lateral ones directed to the oral 
tentacles, like the reins of a bridle; there is a distinct submarginal 
furrow, and there are marginal radiations; surface irregularly and 
delicately reticulated ; tentacles long and tapering, enlarged at base, 
lilac ; anal lappet very long. 
Suet. globose-conical, rather solid; beneath, it is highly polished 
and shining, of a livid, brownish olive-colour; above, reddish chestnut 
brown. ‘The lines of growth are fine and sharp, somewhat grouped 
into little waves resembling coarse and rather regular strie; and 
these are decussated by revolving lines which do not extend much 
below the periphery of the shell. Whorls six, well rounded; suture 
deep, and very slightly margined. Aperture rather small, semilunar, 
the throat coloured like the exterior, or a little glaucous; lip simple 
and sharp, slightly reflected and white as it passes the umbilicus, 
Umbilical region excavated, with a very minute perforation, 
Diameter one inch; axis three-fifths of an inch. 
Inhabits Lebouka, Feejee Islands. 
In shape and size it is like H. zaleta and H. zrregularis ; but in all 
other respects it is like H. velutina, Sowb., to which it is very closely 
allied. Perhaps it is H. Nowlete, Le Guillou. 
Figure 66, the animal, with the shell; 66 @, portion of the shell 
magnified to show the sculpture. 
