56 MOLLUSCA. 
Diameter one-fifth of an inch ; axis one-tenth of an inch. 
Obtained by Messrs. Brackenridge and Drayton, on Kast Maui, 
Sandwich Islands. 
This shell agrees in form and coloration with H. dedalea, and H. 
contorta, Fer., but is larger than either, and further distinguished by 
the smaller number of lamelle and the long, coarse hairs which it 
bears. As the name originally given by me was pre-occupied, I have 
adopted one suggested by Dr. Mighels, and published by Pfeiffer. 
Some specimens found on the island of Hast Maui, by Messrs. 
Drayton and Brackenridge, differ somewhat from those originally 
examined. They are rather smaller, and the umbilicus and aperture 
is more contracted; on the penultimate whorl of one specimen are 
two lamellar teeth, and on the lower half of the lip there are at 
least three short, indistinct lamine. 
Figures 52*, 52* a, 52* d, three views of the shell magnified ; 52* c, 
natural size. 
HELIx STELLULA (Gould). 
Testa parva, discoidea, supra planulata, subtus convexa, utroque umbili- 
cata, fusca, interdum luteo-maculata: spire anfractibus quatuor 
triquetris, costibus acutis, frequentibus lyratis : apertura rhomboidea, 
lamelit unica volvente instructa ; labro simplict. 
Helix stellula, Goutp; Proceed. Boston Soc. Nat. Hist., i. 174. 
May 1844. 
SHELL small, discoidal, concave both above and beneath, of a dusky 
brown colour, here and there spotted with bright yellow. There are 
four or five whorls, flat above, convex beneath, and strongly carinated 
at the periphery, and also angular both above and below, so as to 
become triangular; they are beautifully ornamented with prominent, 
compressed, rather distant radiating ribs, producing a stellate appear- 
ance at the margin. ‘The suture is deeply impressed. Beneath, the 
umbilical cavity is about half the diameter of the shell, and exhibits 
