148 SHELLS FROM THE MOLUCCAS. 
1. Nanina (Xesta) citrina Linn. 
Martens, Ostas. Landschn. p. 193, pl. 6, figs. 1, 2; pl. 7. 
From Leitimor, the southern peninsula of Amboyna, a 
large number of specimens has been procured by Baron 
van Hoévell, all belonging to the typical form, with 
rounded aperture; many specimens are citron yellow, with 
one more or less dark brown band at the periphery, bor- 
dered by a broad whitish zone and a second narrow one 
at the sutures; a few specimens are orange yellow with 
a brown band, others are pale yellow without brown band, 
a single one is purple-brown with only the white zones; 
a rather large number belongs to 
mutatio dimidiata Fav., 
which has the upper part of the shell brown, the under 
part whitish or yellowish; to this variety likewise be- 
long: a specimen from North Ceram, 2 young specimens 
from Wabaai, Ceram, and 3 very young ones from Porto, 
Saparoea; those from Ceram are collected by Martin. 
A few young specimens from this last locality may be 
classified as belonging to the type; this is also the case 
with 2 specimens from Hatoesoea, Ceram, collected by 
Martin, and with a few from the district Wahaai, near the 
Toloearang; 3 young or bad specimens may belong to var. 
columellaris Beck. Still should be mentioned a variety of a 
more or less dark purple brown colour, with whitish zones near 
the sutures and periphery, some of the specimens with one 
brown band like the type, which variety resembles the 
next species in colour, but, according to the rounded 
aperture and more conical shape, belongs to N. citrina; it 
is figured by Reeve (Conch. Ic. Mon. Helix, fig. 4824). Martin 
collected 2 specimens at Porto, Saparoea, and another in- 
dividual, without brown band, on the same isle, but without 
noticing the exact locality, while Baron van Hoévell pro- 
cured specimens from the kampong Saparoea. 
Notes from the Leyden Museum, Vol. XV. 
