147 
Shell elongate-ovate; whorls 6, rounded; suture above lightly 
impressed, becoming deep at the junction of the last whorl; aper- 
ture small, ovate; lip simple; columella with a twisted plait; the 
last whorl contracted and covered with a dense black epidermis; the 
superior whorls white, with numerous arrow-headed brown markings. « 
This shell is intermediate between 4. modesta of Adams, a Molokai 
species, and 4. assimilis, the following species. 
50. AcHATINELLA Jounsont (Pl. XXIII. fig. 50). A. testa dex- 
trorsa, elongato-conica ; anfractibus 7, subrotundis, superne leviter 
submarginatis ; sutura profunda; apertura subovata ; columella 
valde plicata, rosea, margine nigro; colore teste albo vel roseo cum 
lineis nigris 2 aut pluribus, quarum una vel duo centralibus, una 
suturali et altera plerumque ampliori infra anfr. ultimum. 
Long. 3 lat. a poll. 
Hab. Kolau, Oahu. 
Shell dextral, conically elongate ; whorls 7, slightly rounded, supe- 
viorly indistinctly margined ; suture rather deep ; aperture subovate ; 
columella with a strong plication, pink, margined with black ; colour 
of shell white or pinkish, banded with two or more narrow black lines, 
one or two of which are central, one sutural, and one usually broader 
inferiorly on the last whorl. 
Thefollowing form an allied group :—<. producta, hybrida, aplustre, 
venulata and Johnsont. 
This species is dedicated to the Rev. Mr. Johnson, of Kawai, whose 
assistance in my researches I most thankfully acknowledge. 
51. ACHATINELLA APLUSTRE (Pl. XXIII. fig. 51). A. testa co- 
nica, dextrorsa ; anfractibus 7, rotundis ; sutura leviter impressa, 
simplici ; apertura semiovata ; labro tenui; columella callosa, in 
plicam tortam terminante, colore albo-ceruleo, apice fusco ; anfr. 
3 primis spiralibus albidis, reliquis vitta ampla, centrali coloris 
rosei et fasciis binis nigris, marginalibus ornatis ; anfr. ultimo 
fasciis 2 viridibus. 
10 
Long. 1; lat. 5; poll. 
Hab. Kolau, Oahu. 
Shell conical, dextral; whorls 7, rounded; suture moderately im- 
pressed, simple; aperture semiovate ; lip thin, with a callus, termi- 
nating in a twisted plait, bluish white tipped with brown ; three first 
spiral turns white, the others with a broad central pink band, mar- 
gined by two deep black bands ; on the last whorl, superiorly and in- 
feriorly, is a broad bright green band. 
The gaudy colouring of this species alone separates it from the 
A. Johnsoni, nob. It belongs to the same section with 4. producta, 
Reeve, which may be taken as the type of a group of species num- 
bering some half-a-dozen, and which requires still further additions 
to render it complete. 
52. ACHATINELLA HyBRIDA (PI. XXIII. fig. 52). A. testa dea- 
trorsa, conica; anfractibus 6, rotundis, superne marginatis ; ul- 
