GASTEROPODA. 51 
Helix rulnginosa, Goutp : Proceed. Boston Soc. Nat. Hist., ii. 173. 
Sept. 1846. Expedition Shells, 21. Pretrrer; Monog. Helic., i. 187. 
SHELL orbicular, depressed, rusty horn-colour, finely checkered with 
dusky, minutely costate-striate. Beneath broadly umbilicated, dis- 
playing all the whorls. Whaorls five, closely revolving, higher than 
broad, rounded; suture deeply impressed. Aperture not much ob- 
hique, semilunar, lip simple. Penultimate whorl with a single lamina 
revolving in the aperture. 
Diameter seven-thirtieths of an inch; axis three-fortieths of an 
inch. 
Inhabits Kauai, Sandwich Islands. Couthouy. 
Larger than the other checkered shells of this group. In colour, 
form, and sculpture it is ike young H. dbursatella, but is still more 
like H. striatella, or like H. radiata as to colouring. It is not, like 
them, carinated. 
Figures 49, 49a, 49 6, three views of the shell, enlarged; 49 ¢, na- 
tural size. 
HELIX BURSATELLA (Gould). 
Testa parva, per-variabilis, rotundata, conica vel planulata, supra macu- 
lis fuscis et albidis alternantibus flexuosis tessellata, infra cinereo- 
albida vel flammulis fuscis flexuosis radiata, costis numerosissimis 
acutis radiantibus lyrata ; subtus convexiuscula, interdum simplex, 
interdum concentricé striata, nunc radiatim costellata, nunc albida, 
nunc fusco flammulata: spira anfractibus ad octo extrinsecus exca- 
vatis, ultimo carinato; sutura impressa, plerumque marginatéa : 
apertura parva, transversa ; fauce lamellis septem volventibus in- 
structo, quorum due superiores, una columellaris, quatuor remote (una 
supra, tres infra carinam) ad labium ; labro simplici ; umbilico caver- 
noso, in juntoribus acetabuliformi, in majoribus ad januam parvo, 
constricto, margine acuto, una cum labio continuo. 
Helix bursatella, Goutp; Proceed. Boston Soc. Nat. Hist., ii. 175. 
