— 10 — 
profunde sub .anfr. penult. sito, subperpendieulari 
angulum obtusum distinetum formans. Long. 181],, 
diam. 13, alt. 8'/, mm.; apert. long. 12!/,, lat. 9 mm. 
Hab. in Sibiria ad Jenissei adversus Chantojskoj (lat. 
63° 5), forma minor in insulis Briochowskij (lat. 70° 
39% et ad Selivaninskoj (lat. 65° 55%. 
Physa (Aplexa) hypnorum Lin. var. polaris.n. 
Testa ovato-elongata, turrita, solidula, laevis, nitidissima, 
fulvo-rufa, spira elongata, acutiuscula vel acuta; anfr. 
‘6, planulati, superne distinete,obtuse angulati, suturam 
versus declivi; apertura superne angulata, infra anguste 
rotundata, columella subcontorta, cum pariete sat con- 
vexo angulum perdistinetum formante, margine dextro 
extense sed regulariter curvato, simplici, acuto. Long. 
13, diam. 5!/,. mm.; apert. long. 7, lat. 3 mm. 
Hab. in Sibiria prope Jenissei ad Schaitanskoj (lat. 71° 
55°, Mesenkin (lat. 71° 20%) et Worogowa Selo (lat. 
60° 50°). Forte species. 
Physa (Isidora?) sibirica nov. sp. 
Testa_ ovato-elongata, imperforata, irregulariter elevato- 
striatula, solida, nitidula, fusco-cornea; spira elonga- 
tula, conica, acuta; anfr. 5'/, (6), convexi, ad suturam 
plano-depressi, sutura alba infra obscure marginata 
sat profunda separati, penultimus antice ventricosus; 
apertura dimidiam testae partem paullo superans, 
columella subcontorta, pariete convexo S formi, parte 
inferiori subhorizontali, margine columellari subverti- 
cali, strieto. Long. 9'/,, long. apert. 6, spirae 3°), mm. 
Hab. in Sibiria prope Jenissei ad Sopotschnaja Korga 
(lat. 719 40%). 
