186 LAND- AND FRESHWATER MOLLUSCS 
and Guyana, among them the widely distributed Opeas 
micra, Melampus pusillus and Melampus flavus; Drymaeus 
elongatus, an Antillean species, of which the occurrence in 
Venezuela is doubtful; and Liguus virgineus, a species from 
Haiti, very probably imported in Guyana as well as in 
Curacao. So may have been also Plewrodonte incerta and 
Pleurodonte lima. Amnicola coronata, var. crystallina, oecur- 
ring in some of the Antilles and in Central-America, is 
not yet recorded from Venezuela, as has been the typical 
coronata. The remaining 14 species (not taking in consid- 
eration the Planorbis spee., too young for identification) 
seem to be peculiar to the Curacao-group of islands. 
Now it is remarkable that the genera, to which these 
species are belonging, with exception of the widely spread 
Leptinaria, Pupa and Succinea, do not occur in the continent 
of South-America, or only very sporadically. Cerion has 
its greatest development in Cuba and the Bahamas, occurring 
also in Haiti, Portorico, the Virgin-islands, the Cayman- 
islands and, semifossil, in St. Croix. Brachypodella is dis- 
tributed in the Greater Antilles, with some species occurring 
in the Virgin-islands (1), St. Croix (1), St. Martin, St. Bar- 
thelemy, Guadeloupe, Marie-Galante, Saintes, Martinique 
and St. Vincent (1), St. Lucia (1), Barbados (1), Trinidad (1), 
Central America and Mexico (4), Colombia and Venezuela (2), 
Eeuador (1). Microceramus, to which genus, according to 
Pilsbry, Pineria? bonairensis, nearly related to the Micro- 
ceramus spec. from Curacao, very likely will prove to belong, 
is chiefly occurring in Cuba, with some species living in 
Mexico and Central-America (3), Texas (1), Florida (2), 
Haiti and Jamaica (1), Bahamas (2). The subgenus Neo- 
subulina of Leptinaria is restricted to the islands Curacao 
and Bonaire with its two species gloynii and harterti, and 
a variety of the former. Tudora is living in Cuba, Haiti 
and chiefly in Jamaica, with one species in Mexico. Cistula 
is occurring chiefly in Cuba, with some species living in 
Haiti, Jamaica, Portorico, Central-America, Yucatan and 
the Lesser Antilles. 
Apart from the Dutch possessions, the only other locality 
Notes from the Leyden Museum, Vol. XXXVI. 
ital tie 
