HELICINA § 9.10. 
385 
planiusculi , ultimus obsolete subangulatus ; columella brevis- 
sima, basi subnodosa, in callum circumscriptum, sub lentc 
granulatum retrorsum dilatata ; apertura subobliqua, semilunaris ; 
perist. simplex, breviter expansum, margine basali leviter ar- 
cuato, in nodulum columellarem sensim transeunte. — Operc. 
tenue, immersum, lutescens. — Diam. maj. 5, min. 4 s / 4? alt. 
37s mill. (Mus. Cuming.) 
Helicina diaphana Pfr. in Proc Zool. Soc. 1850. p. 98. 
Habitat in Honduras (Dyson). 
101 . II® Kiisterlaini Pfr. 664 
T. depressa, tenuiuscula, oblique striata et lineis elevatis 
concentricis, distantioribus brevissime pilosis munita, diaphana, 
pallide cornea; spira brevis, obtusa; anfr. vix 3y 2 convexius- 
culi, ultimus depressus, antice non descendens, basi parum 
convexus; apertura obliqua, triangulari - semiovalis ; columella 
brevissima, simplex, retrorsum in callum semicircularem , vi- 
treum, antice in peristoma simplex, tenue, expansiusculum 
abiens. — Operc.? — Diam. maj. 4V 3 > min. 4, alt. 2*/i mill. 
(Coll. Philippi.) 
Helicina Kusteriana Pfr. in Zeitschr. f. Malak. 1848. p. 88. 
— — C!>cmn. ed. II. N. 64. p. 50. t. 9. f. 22—25. 
Habitat in insula Tahiti. 
102. II. Louisiadensis Forties. 665 
T. conoideo-depressa , solidiuscula , nitida, sub lente con- 
centrice striata, rubello - cornea ; spira conoideo-convexa , acu- 
tiuscula; anfr. 4 convexiusculi, ultimus subdepresso-rotundatus, 
basi pone columellam brevem subexcavatus , leviter callosus ; 
apertura obliqua, sub triangulari- semiovalis ; perist. simplex, 
tenue, undique breviter expansum. — Operc. subtriangulare, 
pallidum. — Diam. maj. 4'/. 2 , min. 3 2 / 3 > alt. 2% mill. (Mus. 
Cuming.) 
Helicina Louisiadensis Forbes in Voy. Rattlesnake. App. p. 382. t. 3. f. 5. 
Habitat „Round Island in Coral Haven“ Archipelagi Louisia- 
darum (MacgilJivray), 
§. 10 . 
103. II. Sowerbyana Pfr. 666 
T. depresse trochiformis , tenuiuscula , lineis impressis 
spiraliter sulcata, alba; spira conica, acutiuscula; anfr. 6 pla- 
25r 
