646 MR. HARPER PEASE ON THE [Dec. 9, 
for the group of species represented by H. lugubris (Chem.), which 
was the first species described. 
The species of this genus are thick, solid, polished, globose conic, 
with the apex acute. They are quite distinct from Bulimella, with 
which they have heretofore been associated. 
Genus 2. ACHATINELLASTRU™ (Pfr.). 
Achatinellastrum, Pfr. Mal. Blatt. 1854, p. 133; Mon. Hel. Viv. 
1859, vol. iv. p. 531. 
T. turrita aut elongato-conica, solida, epidermide nitida ; plica co- 
lumellari valida, torta, dentiformi; perist. recto; labro. via 
incrassato. 
Achatinellastrum bilineatum Achatinellastrum johnsoni 
(Rve.). (Newc.). 
buddi (Newe.). liliaceum (Pfr.). 
castaneum (Rve.) = olivaceum (Rve.). 
“ adustum” (Rve.). —— productum (Rve.). 
— cueumis (Gul.). pulcherrimum (Swains. ). 
—— fulgens (Newc.). trilineatum (Gul.). 
—— formosum (Gul.). vulpinum (Feér.). 
grayanum (Pfr.). versipilis (Gul.). 
Sec. 2. 
dubium (Newc.). radiatum (Gld.). 
I restrict the above genus to the species allied to 4. productum 
(Rve.). They are confined in their habitat to the easterly end of 
the island of Oahu. 
Sec. 2 includes two aberrant forms, which agree with each other 
in their general characters, but differ from the type in being of 
thinner texture, not so elongate. A. dubium is without any colu- 
mellar fold, and A. radiatum has it but slightly developed. 
Genus 3. Butime.ta (Pfr.). 
Bulimella, Pfr. Mal. Blitt. 1854, p. 119; Mon. Hel. Viv. vol. iv. 
1859, p. 518. 
T. imperforata, bulimiformis, polita, solida, ovato-conica, apice ob- 
tuso; plica columellari valida ; labro intus incrassato. 
Bulimella bulimoides (Swains.). _ Bulimella rosea (Swains.). 
elegans (Newe.). rutila (Newe.). 
faba (Pfr.). sowerbyana (Pfr.). 
—— glabra (Newce.). swainsoni (Pfr.). 
-—— hanleyana (Pfr.). —— teniolata (Pfr.). 
—— ovata (Newe.). 
Sec. 2. 
——— byronii (Gray ). subvirens (Newc.). 
decipiens (Newc.). —— viridans (Migh.). 
rugosa (Newe.). 
