PARTULA.— Plate IY. 
The compressed form of this shell is characteristic, and 
so also is the livid-purple colouring of the interior. 
Species 21. (Mus. Cuming.) 
Partula Navigatoria. Part, testa oblongo-ovata, cras- 
si.usculd, medio ventricosa, anguste imbilicata, anfrac- 
tibus snbrude oblique strialis, vix spiraliter lineatis, 
aperturd auriculala, columella labroque late calloso-re- 
flexis ; fnlvo-caslanea, labro albido. 
The Navigator Partula. Shell oblong-ovate, rather 
thick, slightly vcutrieose in the middle, narrowly nm- 
bilicated, whorls somewhat rudely striated, scarcely 
spirally lineated, aperture auriculate, the lip and 
columella being broadly callously reflected ; fulvous 
chestnut, lip white. 
Pfeiffer, MS. (Mus. Cuming). 
Hab. Navigators’ Islands. 
The aperture of this species, which may be distinguished 
by its oblong-oval form, slightly ventricose in the middle 
only, is very similar to that of P. Otaheitana. 
Species 22. (Mus. Cuming.) 
Partula solidula. Part, testa acuminato-ovata, sub- 
gibbosd, compresse umbilicata, solululd, anfractibus 
planiconvexis, oblique irregulariter strialis, lineis spi- 
ralibus impressis minute sculp tin, aperturd auriculata, 
columella, labroque late calloso-rejlexis ; straminea, 
apice interdum rafescente, labro alio. 
The solid Partula. Shell acuminately ovate, rather 
gibbous, compressly umbilicated, solid, whorls flatly 
convex, obliquely irregularly striated, minutely sculp- 
tured with spiral impressed lines, aperture auriculate, 
the lip and columella being broadly callously reflected ; 
straw-colour, sometimes reddish at the apex. 
Hab. Society Islands. 
A solid subtrnnsparent shell, having the character and 
substance of P. Otaheitana with the form and colouring of 
P. gibba ; excepting that the whorls are not crowned 
with the white sutural band which is constant in that 
species. 
Species 23. (Mus. Cuming.) 
Partula decussatula. Part, testa subabbreviato-ovatd, 
tenui , mfiata, anfractibus quatuor, convexis, slriis 
obliquis lineisque spiralibus impressis eximie clecussatis, 
aperturd subcontracta, rotundato-ovatd, labro parum 
rejlexo ; pellucido-albd. 
The decussated Partula. Shell somewhat abbre- 
viate^ ovate, thin, inflated, whorls four in number, 
convex, faintly decussated with oblique strise and 
spiral impressed lines, aperture rather contracted, 
rotuudately ovate, lip but little reflected; trans- 
parent white. 
Pfeiffer, MS. (Mus. Cuming). 
Hab. ? 
A thinner and more inflated shell than P. liyalina, and 
equally transparent. 
Species 24. (Mus. Cuming.) 
Partula spadicea. Part, testa acuminato-oblonga, ten- 
uiculd, compresse umbilicata, anfractibus convexis, striis 
obliquis lineisque spiralibus impressis eximie decussatis, 
aperturd ovata, parviuscula, columella plano-appressa, 
labro declivi-reflexo ; pellucido-spadiced, labro albido. 
The fawn Partula. Shell acuminately oblong, rather 
thin, compressly umbilicated, whorls convex, faintly 
decussated with oblique stria; and spiral impressed 
lines, aperture ovate, rather small, columella flatly 
oppressed, lip reflected in a slanting direction ; trans- 
parent fawn-colour, lip whitish. 
Hab. Marquesas Islands. 
A delicate subtransparent shell, of a uniform trans- 
parent fawn-colour. 
Species 25. (Mus. Cuming.) 
Partula Hebe. Part, testa abbreviato-conicd, globosd, 
gibbosa, solidula, umbilicata , anfractibus rotundatis, 
striis obliquiis subrugosis lineisque spiralibus impressis 
decussatd, aperturd orbiculari, callositate erecta supra 
columellam, columella labroque calloso-rejlexis ; seini- 
pellucido-albd. 
Hebe’s Partula. Shell abbreviately conical, globose, 
gibbous, rather solid, umbilicated, whorls rounded, 
decussated with rather rough oblique strise and 
spiral impressed lines, aperture orbicular, with an 
erect callosity above the columella, lip and columella 
callously reflected ; semitransparent white. 
Pfeiffer, Pro. Zool. Soc. 1846. p. 39. 
Hab. Society Islands. 
Distinguished by its short globose manner of convo- 
lution. 
