220 
HELICINA §. 26. 
219. II. trochlea Gould. 
T. minuta, conoidea, tenuiuscula, striata et spiraliter lirata, 
lutescens, superne albido-maculata; spira acute conoidea; su- 
tura canaliculata ; anfr. 4 subplanati, ultimus superne liris 3 — 4 
compressis munitus , peripheria acute bicarinatus , basi con- 
vexior, laevigatus , medio callo tenui, albido obductus; aper- 
tura parum obliqua, subtriangularis ; perist. tenue, margine 
basali reflexiusculo , cum columella brevi angulum subrectum 
formante. — Operc. ? --- Diam. maj. 3, min. 2 2 / 3 , alt. 2 mill. 
(Mus. Cuming) 
Helicina trochlea Gould Exped. Sh. t. 7. f. 109. 
— — Pfr. Mon. Pneum. p. 404. n. 148. Malak. Bl. 1857. 
p. 37. 
— — Gray Cat. Phan. p. 295. 
— — (Pachystoma) H. et A. Adams Gen. II. p. 303. 
Habitat Aurora Island. (Spec. Gouldiana typica.) 
V. Schasicheila Shuttleworth. 
Operculum tenui-testaceum , semicirculare , planiusculum, 
extus costa externe intramarginali elevata circumdatum, mar- 
gine columellari stricto, intus lamella paululum producta in- 
crassato et subsulcato, utrinque, sed praesertim inferne in 
apiculum producto, margine externo rotundato, acuto. — Testa 
heliciformis, epidermide pilosa partim obducta, basi impressa; 
apertura semicircularis ; perist. subcontinuum, margine dextro 
juxta insertionem profunde inciso, infra incisionem alatim di- 
latato. 
Schasicheila*) Shuttl. in Bern. Mittheil. 1852. Dec. p. 301. Diagn. n. 
Moll. Nr. 3. p. 41. 
— Pfr. in Malak. Bl. I. 1854. p. 104. 
- H . et A. Adams Gen. rec. Moll. II. p. 306 : genus He- 
licinidarum. 
Helicinae spec. Menke, Pfr., Morelct, Gray. 
1- Sch* Nleoleti Shuttle worth. 
T. depresse globoso-conica, tenuis , striatula, lineis spira- 
libus epidermide fusca soluta hispidulis circumdata, albida, 
q 2Hx<xoig, incisio ; labrum, 
