Placostylus Seemanni Dohrn. 
Partula lirata Mousson. 
Stenogyra juncea Gould. 
— novemgyrata Mousson. 
Vertigo pedieulus Shuttl. 
var, Samoensis Mousson. 
— tantilla Gould. 
Tornatellina conica Mousson. 
var. impressa Mousson. 
— columellaris Mousson. 
Physa sinuata Gould. 
— gibberula Mousson. 
Cassidula cerassiuscula Mousson. 
var. vitiensis Mousson. 
— intuscarinata Mousson. 
Pythia pollex Hinds. 
— Savaiensis Mousson. 
Melampus luteus Quoy. 
— avenaceus Mousson. 
— faseiatus Deshayes. 
Cyelophorus diatretus Gould. 
var. intercostata Moussen. 
Diplommatina pomatiaeformis 
Mousson. 
subregularis Mousson. 
Godeffroyana Mousson. 
var, latecostata Mousson. 
— fraeta Mousson, 
ascendens Mousson. 
tuberesa Mousson. 
Martensi H. Adams, 
var. macroston,a Mousson. 
— quadrata Mousson. 
Moussonia fusceula Mousson. 
var. Vitiana Mousson. 
Omphalotropis ingens Mousson, 
— costulata Mousson. 
eireumlineata Mousson, 
— subsoluta Mousson. 
rosea Gould. 
zebriolata Mousson. 
21 
Omphalotropis longula Mousson. 
— Monussoni Pease. 
— parva Mousson. 
— bifilaris Mousson. 
var. angusta Mousson.. 
Hydrocena brevissima Mousson. 
Trunecatella Vitiana Gould. 
arctecostata Mousson. 
— Arcasiana Ürosse. 
— turrieula Mousson. 
— funiculus Mousson. 
— semicostata Montrouzier. 
Helieina fulgora Gould. 
var. expansa Mousson, 
tectiformis Mousson. 
pallida Gould. 
beryllina Gould. 
interna Mousson. 
Semperi Graeffe. 
musiva Gould. 
Melania aspirans Hinds, 
pieta Hinds. 
— plicatilis Mousson. 
Seipio Gould, 
Plutonis Hinds. 
var. callosa Mousson. 
lutosa Gould. 
var. crassiuscula Mousson. 
— Graeffei Mousson. 
— interposita Mousson. 
Samoensis Reeve. Samoa, 
var. exposita Mousson. 
Ovalana Mousson. 
var. plicocostata Mousson. 
— Kanathiana Mousson. 
exusta Reeve. 
subexusta Mousson. 
var. persuleata Mousson. 
— albizonata Mousson. 
luetuosa Hinds. 
acutospira Mousson, 
