188 C. A. Wesferhmd, Synopsis Molluscomm Extramarinor. Scandin. 



postice in rostrum breve obtusum desinens; margo supe- 

 rior arcuatus, inferior convexus; nates depressse, parce 

 plicatulse (erosae); laminula brevis; margarita argentea, 

 nitida. Long. 77, alt. 55, cr. 30 mm. 

 Hah. Suecia in prov. Skane (in Wombsjon: R. H.). 



2. Pseudanodonta Bourg. C. ovalis vel rhomboidea, compres- 

 sissima, antice hrevissima, cmgusta, ]iostice ad angulum 

 carinalem dUatata, deinde suhabrupte rostrata, dente ante- 

 riore in utraque valva lameUiformi; umbones depressi, na- 

 tibiis parvis, acutis. 



A. complanata (Z.) Rossm. (Icon. f. 68, 1835). G. elliptico-ovata, 

 brunneo-olivacea, nitida, striata, rugis densis, fuscis, margo 

 dorsalis arcuato-ascendens, angulo obtuso in marginem 

 posteriorem longe lenteque declivum et subrectum tran- 

 siens, margo ventralis extense arcuatus, ad fines sat alte 

 ascendens, postice in rostrum submedianum, triangulare- 

 acuminatum desidens. Long. 70, alt. ad umb. 38, a. post- 

 ligam 40, cr. 20 mm. 



Hah. Suecia in Skane (Nosea et Almaa), Smaland et Oster- 

 gotland pluribus locis. Upland, Westmanland (ad Westeras in 

 Svartan), Dalarne (in lacubus Honsan, Hejan etc.). — Fennia 

 ad Vanajavesi prope Tavastehus, Satakunta, ad Fredrikshamn (in 

 Skogby) et in Aland in palude ad Torpby (Mus. Helsingf.) 



A. goesi n. sp. G. a parte anteriore angusta retrorsum sensim 

 et utrinque aequaliter marginibus rectis ad tres partes 

 vel ad angulum cristalem sat validum forte dilatata, 

 postice et desuper fortius in rostrum latum, breve et 

 apice subcirculari-rotundatum attenuata. Long. 65 (pars 

 ant. 20, p. post. 45), alt. ad umb. 28, ad ang. 38, cr. 

 14 — 15 mm. 

 Hah. Suecia in Westergotland (in fluvio Lidan=-=: A. G.) 



et in Ostergotland (in amne Svartan: A. G.). 



A. klettii Rossm. (Icon. I. 1835). G. oblongo-elongata, compressa 

 (s^pe convexula), tenuis (ssepe solidula), sulcatula, nitida, 

 virescens vel castanea, antice et postice subsequaliter ro- 



