COLUM BELLA. 359 



West-Indian : 3. Valuta hyalina, Montagu, as from 

 Dunbar (Laskey) ; young of C. lactea, a common West- 

 Indian shell. The V. heteroclita of Montagu, a sinis- 

 trorsal shell, introduced on the last more than suspi- 

 cious authority, is likewise exotic. 



B. Outer lip thin and smooth ; apex of the spire irregularly 

 coiled. Thesbia (one of the sea-nymphs of Hesiod). 



Tkc^bi*- rto-n*- 



2. C. NANA*,(Loven.)E^*M,] \\-&$. 



Tritonium ?nanum, Lov. Ind. Moll. Scand. p. 12. Mangelia nana, 

 F. & H. iii. p. 461, pi. cxii. f. 8. 



BODY milk-white, all but the gills and liver, which are light 

 brown : tentacles cylindrical, rather short [slender (Loven)] : 

 eyes proportionally large, placed on the tentacles, close to their 

 outer bases : foot narrow and thin : [odontophore having a 

 pleural spine almost like that of "Manglia costata." (Loven.)] 



SHELL spindle-shaped, resembling Fusus gradlis in minia- 

 ture, thin, semitransparent, and glossy : sculpture, numerous 

 fine and narrow spiral impressed lines, of which there are 

 about a dozen on the penultimate whorl ; they are closely and 

 regularly punctured, so as to form rows of circular dots ; top 

 whorls very closely and microscopically corrugated in the same 

 direction : colour uniform milk-white : epidermis, none per- 

 ceptible : spire tapering ; apex abruptly twisted : whorls 4|-5|, 

 convex and evenly rounded, rather suddenly enlarging; the 

 last occupies about three-fifths of the shell : suture deep, some- 

 what oblique : mouth irregularly oblong, acute-angled above ; 

 length (including the canal) two-fifths of the shell: canal 

 rather broad, inclining a little (but not abruptly) to the left, 

 and ending in a slight and obliquely curved notch : outer lip 

 flexuous, retreating at the upper part, but without exhibiting 

 any fissure or notch ; it folds inwards rather than outwards ; 

 edge sharp and thin ; inside quite smooth : inner lip slight, 

 narrow, and even : pillar flexuous ; fold obscure : operculum, 

 none that I could detect in the moistened animal of a specimen 

 from which I have taken an imperfect description of the soft 

 parts. L. 0-25. B. 0-125. 



HABITAT : Shetland, in the coralline zone, rare (J. 



* Dwarf. 



