HELICINA $. 9. 10. 385 
planiuseuli, ultimus obsolete subangulatus; columella brevis- 
sima, basi subnodosa, in callum circumscriptum, sub lente 
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?/, alt. 
3'/, mill. (Mus. Cuming.) 
Hoelicina diaphana Pfr. in Proc. Zool. Soc. 1850. p. 98. 
Habitat in Honduras (Dyson). 
101. EH. Fádtsterinma E'fr. 664 
T. depressa, tenuiuscula, oblique striata et lineis elevatis 
concentricis, distantioribus brevissime pilosis munita, diaphana, 
palhde cornea; spira brevis, obtusa; anfr. vix 3'/, convexius- 
culi, ultimus depressus, antice non descendens, basi parum 
convexus; apertura obliqua, triangulari-semiovalis; columella 
brevissima, simplex, retrorsum in callum semicircularem, vi- 
treum, antiee in peristoma simplex, tenue, expansiusculum 
abiens. — Operc.? — Diam. maj. 4?A4, min. 4, alt. 2'/, mill. 
(Coll. Philippi.) 
Helicina: Küsteriena Pfr. in. Zeitschr. f. Malak. 1848. p. 88. 
-—- — Chemn. ed. II. N. 64. p. 50. t. 9. f. 22—95. 
Habitat in insula Tahiti. 
102. Hi. EKouisiademsis Forbes. 665 
T. conoideo-depressa, solidiuscula, nitida, sub lente con- 
centrice striata, rubello-cornea; spira conoideo-convexa, acu- 
tiuseula; anfr. 4 convexiusculi, ultimus subdepresso-rotundatus, 
basi pone columellam brevem subexcavatus, leviter callosus; 
apertura obliqua, subtriangulari- semiovalis; perist. simplex, 
tenue, undique breviter expansum. — Operc. subtriangulare, 
pallidum. — Diam. maj. 4'/,, min. 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 (Macgilhivray). 
STO 
103. EH. Sowerbyamna Pfr. 666 
T. depresse trochiformis, tenuiuscula, lineis impressis 
spiraliter suleata, alba; spira conica, acutiuscula; anfr. 6 pla- 
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