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252. Sphaerium [Calyeulina Cless.] laeustre Müll. 
f. majus W. 
253. Sphaerium [Calyculina Cless.] Steinii Ad. Schm. 
254. Sphaerium [Calyculina Gless.] Ryckholti Norm. 
var. danicum less. 
var. angulatum Cless. 
255. Sphaerium [Calyeulina Cless.] Brochonianum Bourg. 
256. Sphaerium [Calyceulina Cless.] hungaricum Haz. 
XLIV. Gen. Pisidium G. Pfr. (s. Corneocyclas Fer.) 
257. Pisidium [Fluminina Cl.] amnieum Müll. 
var. elongatum Baud. 
258. Pisidium [Rivulina Cl.] supinum A. Schm. 
259. Pisidium [Tropidocyclas Dall.] Henslowianum Sheppard. 
260. Pisidium [Fossarina Cl, (nec Adams) s. Cyclocalyx Dall] 
pulchellum Jenyns. 
var. inflatum Ulieny. 
261. Pisidium [Fossarina Cl.] nitidum Jenyns. 
var. bohemicum Uli. 
262. Pisidium [Fossarina Cl.| fontinale C. Pfr. (+'mut. magna.) 
var. compressum Ulic. 
var. Clessini v. Kimak. 
T var. curtum Cl. 
var. roseum Scholtz. 
var. ovatum Cless. 
263. Pisidium [Fossarina Cl.] intermedium Gass. 
264. Pisidium [Fossarina Cl.] pallidum Gass. 
265. Pisidium [Fossarina Cl.] pusillum Gmel. 
266. Pisidium [Fossarina Cl.] obtusale C. Pfr. 
var. Scholtzi Cless. 
var. personatum Malm. 
267. Pisidium [Fossarina Cl.] subtruncatum Malm. 
268. Pisidium [Fossarina Cl.] milium Held. 
var. Normanianum Dupuy. 
269. Pisidium [Fossarina Cl.] rivulare Cless. 
