386 
HELICINA §. 10. 
niusculi , ultimus subcarin.atus , basi convexiusculus ; apertura 
parum obliqua, sub triangularis ; columella tenuis, basi nodi- 
fera; perist. simplex, angulatim expansum, margine supern 
sinuato; callus basalis tenuissimus. — Operc. ? — Diam. maj. 
21, min. 17, alt. 14 mill. (Mus. Cuming.) 
Helicina Sowerbyana Pfr. in Proc. Zool. Soc. 1848. p. 124. 
— — Chemn. ed. II. N. 65. p. 50. t. 6. f. 9. 10. 
Habitat Guatemala (Lattre). 
667 104. 81. occidentalis Guildin^o 
T. depressa, tenuiuscula, lineolis obliquis subgranulata, 
albo-flavida, rufo nebulosa et variegata; spira brevis, conoidea, 
submucronata ; anfr. 6 planiusculi, ultimus depressus, angula- 
tus , basi fere planus ; apertura perobliqua , triangularis ; colu- 
mella brevis, basi subtuberculata, retrorsum in callum diffusum 
dilatata; perist. expansum, reflexum, margine supero depresso. 
— Operc. semiovale, nigro - castaneum. — Diam. maj. 19, 
min. 15, alt. 10 '/. 2 mill. (Mus. Cuming.) 
Helicina fasciata Guild, in Linn. Trans. XIV. 2. p. 339. Nec Lam. 
— occidentalis Guild, in Zool. Journ. III. p. 529. t. 15. f. 6 — 10. *) 
— — Desk, in Lam. hist. VIII. p. 164. N. 19. 
— _ Sow. Thes. N. 30. p. 7. t. 2 f. 86. 87. **) 
— — Chemn ed. II. N. 66. p. 51. t. 6. f. 19 20. t. A. 
f. 13. (ex Guild.) 
Pachytoma occidentalis Swains. Malac. p. 337. (p. 184. f. 28.) 
ft. Minor, distinctius rubro-fasciata. 
Habitat in insula St. Vincentii, 2000* supra Oeeanum. 
668 105. 81 . anioesaa Pfr. 
T. subsemiglobosa, solidiuscula, oblique striatula, lineisque 
impressis, concentricis , distantibus sculpta, nitidula, roseo et 
luteo vel albo variegata; spira convexa, mucronulata; anfr. 
5'/ 2 vix convexiusculi , ultimus infra medium carinatus, basi 
subplanus; apertura obliqua, subtriangularis, intus flava; colu- 
mella brevis, verticaliter subrimata, basi angulosa, retrorsum 
*) T. flavida, superne rufo-nebulosa , subtus unifasciata ; eolumella lac- 
tea, labro candido ; anfr. 6 ; operculo brunneo, margine pallido. — ft. Superne 
trifasciata, fascia media majori. — y. Superne rufo varia, margine immacu- 
lato. (Guild. 1. c.) 
**) T. depressa, reticulata; obsoletissime carinata; columella rotundata ; 
labio extemo expanse, reflexo; operculo corneo. (Sow. 1. c.) 
