ALCADIA. 
^249 
presso et angulatim producto, basali smu seniicirculari a co- 
lumella separate, — Operc. tenue, rubellum. — Diam. maj. 
8V3J 6^/4, alt. 5 mill. (Coll. Nr. 206 .) 
Helicina gonostoma Gundl. in Poey Memor. II. p. 87. 
Alcadia gonostoma Pfr in Malak. Bl. V, 1858. p. 194. 
* Habitat in insula Cuba: San Juan de Letran prope Trini- 
dad (Gundlach). 
15. A. iaaerBBStata CJiititfllaeli* 
T. conoideo-depressa, tenuiuscula, .seriatim pilosa, rufula, 
tegumento nigricante obducta; spira breviter conoidea; anfr. 5 
modice convexi, ultimus peripheria rotundatus, basi callo nitido, 
lato, subcircumscripto munitus ; apertura fere diagonalis, semi- 
ovalis ; columella subcompressa, antrorsum in denticulum ter- 
minata; perist. vix expansum, margine basali levissime arcuato, 
cum denticulo columellari sinum parvulum formante. — 0[)erc. 
tenue, margaritaceum. — Diam. maj. 10 , min. 8^/4, min. 6^/3 
rnill. (Coll. Nr. 207 .) 
Helicma incrustatu Gundl. in litt. 
Alcadia incvustala Pfr, in Malak. Bl. VI. 1859. p. 80. 
Habitat in insula Cuba: Yatera§ in districto Guantana- 
mensi (Gimdlach). 
16. A. iBiaitsmilSa 
T. conica, solidula, striatula, vix nitidula, albido et rufo 
varie marmorata et fasciata; spira convexo-conica, mucronulo 
pallido terminata; anfr. 5 convexiusculi , ultimus antice de- 
flexiis, basi subplanulatus; columella brevis, filaris, basi denti- 
culo, terminata, callurn emittens tenuem ; apertura obliqua, sub- 
triangulari-semiovalis ; perist. tenue, margine dextro superne 
simplice, turn dilatato et expanse, basali sinu distincto a denti- 
culo columellae separate. — Operc.? — Diam. maj. 71/2, 
min. 62/3, alt. 6I/2 mill. (Coll. Nr. 208 .) 
Alcadia mammilla Weinl. in Malak- Bl. IX. 1862. p 197. 201. 
Habitat in insula Haiti. 
Obs. Persimilis Helicinae Reeveanae Pfr , nec non (peristomatis 
tbrmatione) H. hellulae Gundl. , tamen ob incisurana clistinctani generi 
Alcacliae ab Auctore jure adscripta. 
* 
1565. 
1566. 
