THE NAUTILUS. 31 
DESCRIPTION OF TWO NEW SPECIES OF ACHATINELLIDEA 
FROM THE HAWAIIAN ISLANDS. 
. 
BY D. D. BALDWIN. 
Partulina Hayseldeni n. sp. 
Shell sinistral, minutely perforated, rather solid, ovately conical, 
apex subacute ; surface shining, marked with delicate incremental 
strie, and under a lens exhibiting very close, minute, decussating 
spiral lines; embryonic whorls faintly cross lined. Color generally 
of a uniform reddish-brown ; sometimes the coloring of the middle 
portion of the whorl shades into white on the apical whorls, and in 
some examples a white line revolves below the suture. Whorls 53, 
slightly convex, narrowly margined above, the last carinated or 
angulated at the periphery, the angle becoming almost obsolete to- 
wards the aperture ; suture distinctly impressed and often margined 
above by the continuation of the peripheral keel. Aperture oblique, 
subovate, white within with a pinkish tinge ; peristome white, rather 
obtuse, thickened within, the basal and columellar margins slightly 
reflexed ; columella terminating in a strong, Be=stOue, white fold. 
Length 173; diam. 10 mm. 
Habitat, Island of Lanai. 
Animal when extended in motion longer than the shell. Mantle 
slate color with a brown band encircling the outer edge. Foot above 
and below almost white with a yellowish tinge. Tentacles white 
tinged with slate. 
This species is allied to P. semicarinata Newe. which is found in 
another district of the same island. The latter is a light straw- 
colored, more conical, and invariably dextral shell. The animals of 
the two species are somewhat similar, but sufficiently different to 
warrant the separation. 
We take pleasure in dedicating this handsome shell to Mr. Walter 
H. Hayselden, the young naturalist who discovered both it and the 
following species. 
Amastra aurostoma n. sp. 
Shell dextral, imperforate, solid, elongately ovate, spire conical, 
apex subacute; surface lusterless, striated with somewhat irregular, 
coarse growth striz ; the embryonic whorls finely, radiately sulcated. 
Color light brown, apex dark chestnut; the lower whorls covered 
with a black, fugacious epidermis which is generally dense on the 
Jast whorl and more sparsely distributed on the other whorls. 
