573 
d 
344 HELICINA $.9. : 
10. HE. silacea Morelet. 
T. conoideo-depressa, solida, oblique profunde et confertim 
radiato-sulcata, albida, inter costas virens; Spira convexo- 
conoidea, obtusula; anfr. 4'/, subplanulati, ultimus peripheria 
subangulatus, zonaque virenti-fusca pallide marginata cinctus ; 
columella recedens, alba, basi in tubereulum crassum termi- 
nata, retrorsum callum emittens crassum, circumscriptum 
latoremque hyalinumn, ad marginem dextrum peristomatis 
extensum; apertura diagonalis, triangulari - semiovalis ; perist. 
crassum, album, latum, margine supero stricto, sinuato, basali 
subreflexo. — Opere. testaceum, margaritaceum. — Diam. 
maj. 20, min. I16'/, alt.. 12 mill. (Mus. Poey.) 
Helicina silacea Morelet 'Test. noviss. p. 20. N. 48. *) 
Habitat in. insula Cuba. 
574 11. EH. submnarginata Gray. 
T. depresso-conoidea, solida, oblique striatula, lineis im- 
pressis concentricis decussata, albida, vel fusco-aurantiaca, niti- 
dula; spira brevis, acutiuscula; anfr. 4!/, subplani, ultimus 
antice vix descendens, medio pallide eingulatus; apertura ob- 
liqua, intus albida vel rubella; columella basi breviter dextror- 
sum arcuata, in tuberculum angustum desinens; perist. rectum, 
vix incrassatum, marginibus callo tenuiusculo, diffuso junctis, 
basali plicam distinctam pone columellam immittente. — Operc. 
H. Sagraianae. — Diam. maj. lY, min. 14, alt. 12 mill. 
(Coll. .Nr.. 25.) 
Helicina submarginata Gray in Zool. Journ. IL. p. 68. t. 6. f, 11. **) 
—- E Desh. in Lam. hist. VIII. p. 162. N. 15. 
— — Orb Moll Cub Kk p. 244-5. 191: 77:48 -8555) 
*) T. globoso-depressa, rustice costulata, subtus radiatim decussata, 
ochraceo-albescens, inter strigas saturatior, zona pallide marginata obscure 
cincta; anfr. 5 planulati; apertura subtrigona; perist. crassissimum, labia- 
tum, reflexiusculum, nitidum, album, margine externo sinuoso, interno tuber- 
culo columellari munito; ambobus callo crasso, hyalino, late expanso con- 
nexis. — Diam. maj. 23, min. 18 mill. (Mor. 1l. c.) 
**) '. depresso - ovata, obseurissime carinata, albido-fusca, concentrice 
substriata, spira convexa, distanter spiraliter substriata; subtus convexiuscula, 
laevigata; perist. subincrassato parum reflexo, labiis subincerassatis ; aperturae 
angulo columellari subemarginato, — Axis !/,, diam. "s poll. — Habitat? 
(Gray 1. .e:) 
***) 'P, depressa, crassa, solida, transversim striata, albido-fulva, zona 
albida cincta; spira convexiuseula, obtusa; anfr. 5 planis, contiguis; aper- 
tura semilunari, labro incrassato, non reflexo: columella alba, incrassata; 
