204 Dr. E.von Martens on some Species of Assiminea. 
3. Assiminea miniata, m. 
A, testa ovato-globosa, vix rimata, subtilissime striata, lineis impressis 
binis infra suturam sculpta, intense rubra, unicolore ; spira con- 
vexa, obtusa, szepe erosa; anfr. circa 5, vix convexiusculi, ultimus 
infra ventricosus, carina nulla; apertura spiram superans, fere 
verticalis, supra angulata; peristoma rectum, margine externo 
tenui, columellari incrassato. 
Long. 9, diam. 43, apert. long. 4, lat. 3 millim. 
‘Singapore, on the muddy bank of the streamlet, close to its 
mouth, near the new church, east of the town. 
Head and foot of the animal pale red. 
These species agree with each other, as well as with 4. Grayana 
and A. Francisci, in a peculiar smooth appearance of the shell, 
neither brilliant, nor rough, but as if they were formed of some 
fatty or greasy substance ; the whorls are generally flat, the um- 
bilicus more or less narrow, but existing, the outer lip sharp, the 
inner lip thickened, but neither of them bent outwards ; the 
colour varies from a pale yellow to a deep red, but is never the 
dark dull brown of so many species of Paludina and some Realia. 
A distinct system of sculpture is sometimes entirely wanting ; 
in some species a keel round the umbilicus, in others impressed 
spiral lines below the suture are to be found. 
These species being ascertained, by observation of the 
living animal, to belong to the genus Assiminea must lead, of 
course, to the supposition that some others, very nearly resem- 
bling them, but known only from the dead shell and described 
as Hydrocena, Omphalotropis, Paludina, &c., may also in reality 
belong to the genus Assiminea. I examined, for the purpose of 
deciding this question, a year ago, the shells, in the late Mr. 
Cuming’s collection, called Hydrocena by Dr. Pfeiffer, and have 
since consulted some published descriptions ; and, judging from 
the above characters of the shell as well as in some cases from 
the localities indicated by the authors, it is my opinion that the 
following species belong to the genus Ass¢minea :— 
a. European Species. 
Assiminea Grayana, Leach. Well known to British concho- 
logists. 
Assiminea Charreyi (Melania Charreyi, Morelet, Mollusques 
de Portugal, 1845, p. 98, pl. 7. fig. 5). As this work is not to 
be obtained everywhere, I quote the diagnosis and habitat from 
it :— 
«Testa solida, perforata, fusiformis, ventriculosa, glabra, luteovirens, 
linea albida pone suturam, apice acuta, violacea ; apertura parva, 
ovato-angulata, sublanceolata. Long. 11 millim.” 
