428 
The Treasury shells have the following 
dimensions: Height, 14.8, 17.4, and 15.0mm.; 
diameter, 20.5, 21.8 and 21.2 mm., respec- 
tively. All three specimens have a compar- 
atively sharp angulation on the periphery of 
the body whorl. The development of the 
dark brown spiral bands varies somewhat. A 
faint suprasutural band develops on the penul- 
timate whorl to continue across the body 
whorl as a thin band above the periphery, and 
a stronger spiral band encircles the body whorl 
below the periphery. The columella is white 
tinged with faint pinkish purple. 
Genus Partula Ferussac, 1821 
Subgenus Melanesica Pilsbry, 1909 
Clench (1941: 19) supplied a resume of 
progress in knowledge of the Solomon Is- 
lands members of the group, and commented 
that there was little to report subsequent to 
Pilsbry’s review of the group in 1909. Iden- 
tifications of Solomon Island material using 
the literature available has proved to be im- 
possible and it is obvious that a critical review 
of the group based upon the type material 
and ample localized series is long overdue. 
Partula (Melanesica) cf. cinerea Albers 
Fig. 2 
A single specimen has been seen from the 
Treasury Islands which could be identified 
from the literature with any one of a number 
of forms. It is figured here for the benefit of 
a future monographer. The other available 
Solomon Island material will be described 
later. 
Smith (1885: 955) identified specimens from 
Treasury Island collected by Guppy as P. 
cinerea Albers and also recorded the same 
species from Gulph Island (coll. Brenchley) 
and Guadalcanar (coll. Macgillivray) . Sow- 
erby and Fulton recorded micans Pfeiffer from 
the nearby Shortland Islands ( fide Pilsbry, 
1909: 295). Clench (1941: 20) synonymises 
both cinerea Albers and perlucens Hartman with 
PACIFIC SCIENCE, Vol. IX, October, 1955 
Fig. 2. Partula (. Melanesica ) cf. cinerea Albers. Treas- 
ury Islands (12.7 X 7.3 mm.). 
micans Pfeiffer and indicates that the record 
by Sowerby and Fulton probably is based 
on another species. M. micans apparently oc- 
curs on a group of islands around Ugi, San 
Cristoval. 
The single Treasury specimen of four and 
a half whorls is considerably smaller than any 
specimens seen from Guadalcanar. Height, 
12.7 mm.; diameter, 7.3 mm.; height of aper- 
ture, 6.4 mm., width of aperture, 4.5 mm. 
Placostylus (Placocharis) founaki 
(Hombron and Jaquinot) Rousseau, 1854 
A number of specimens were collected at 
Falimai, Mono Island, by N. Gardner. Clench 
(1941: 8) has recently summarized our knowl- 
edge of the species which has been recorded 
from a number of localities about Bougain- 
ville Strait (Bougainville, Choiseul, Faro, and 
Treasury) and from Ysabel. 
Opeas gracilis Hutton, 1854 
Specimens of this widely distributed spe- 
cies were collected from near the Seveke 
River, Mono Island, by N. Gardner. 
DISCUSSION 
Any discussion of the distribution of the 
land snails of the Solomons is hampered by 
our lack of knowledge of the exact distribu- 
tion of any species within the group. Thus 
the three species that apparently are endemic 
to the Treasuries, Diplommatina aerari , D. 
