160 C.-A. Westerlund, 



concha clensius striata); in prov. Nerike nbique vulgaris (Hartman); ad 

 Stockholm in Sicklaön, ad Kungshamn, in Wermdön et in lacu ad Stora 

 Björknäs (Hartman); in prov. Upland ad Ultima prope Upsala (prof. Lill- 

 jEBORGÜ); in prov. Westmanland in rivo ad Persbo prope Westerås 

 (Johanson!); in prov. Dalarne in par. Gustaf (Ridderbj. sec. Johanson!) 

 et in par. Husby ad Långiiyttebruk (C. G. Andersson!!). 



4. PISIDIUM SÜBTKÜNCATUM Malm. 



Concha insecpiilatera , peroblique trigono-ovata , postice brevissima, 

 ventricosa, tenuissime striatula, nitidula, albida, zona inframediana fusca 

 pleruraque ornata; nmhones parura prominuli, natibus rotundato-convexis, Ise- 

 vibus; valmdœ inferne seepius angulum rectum formantes. Long. S-}, alt. 

 o~, er. 2 mm. 



Cyclas obtusalis Nilssou Hist. Moll. Su. (1822) p. 101. Yerosim.! 

 Pisidiuiii suhtruncatum Malm Göteb. Vet., Vitt. Samli:s Handl. Ill (1855) p. 92. cum fig. 

 Mörcli Syii. Moll. Dan. (1864) p. 72 (exclus, synon.!). Westerlund Sv. Moll. 

 (1865) p. 125; Coll. Typ. Moll. Su. (1868) n:o 117. 

 ? Fisidium ohtusale Nord, et Nyl. Fini. Moll. (1856) p. 80. 



Hab. Suecia multis locis prov. Skåne, prsecipue in amne Höjeå 

 frequens (Nilsson et Malm); in prov. Blekinge solummodo ad Ronneby 

 inveni; in prov. Östergötland multis locis; in prov. Westergötland in 

 Q villebäcken et in Fessbergs å prope Göteborg (Malm); ad Stockholm 

 in Djurgårdsbrunnsviken prope Blå porten (Hartman); in prov. Dalarne 

 in Husby sjön ad Säther frequ. (C G. Andersson!!). Gerte in multis aliis locis. 



5. PISIDIUM OBTÜSALE (Lam?) Jen. 



Concha parum iusequilatera, suborbiculato-ovalis, ventricosa, tenuis- 

 sime striata, sulcis 1 — 3 coucentricis prsedita, vix nitidula, solidula, lute- 

 scenti-albida vel, margine excepto, ex toto cinereo-fusca aut fulva; umbones 

 rotundati, prominentes, validi, inflati, natibus convexis; margo dorsalis an- 

 tice rectiusculus, ventralis et posterior pulchre arcuati; valvidœ inferne an- 

 gulum 90 — 125" formantes. Long. 4 — 5, alt. 3| — 4, er. 3 — 3| mm. 



? Cyclas ohtusalis Lamarck Anim. sans vertebr. V (1818) p. 559. (Conf. Stein Scbn. u. 



Musch. Bari. p. 110!). 



Pisidhmi ohtnsale .lenyns Monogr. Cycl. in Trans. Phil. Soc. Cambr. IV (1833) p. 307, 



Friele Norske Moll. (1853) p. 52. Malm Göteb. Vet., Vitt. Samh:s Handl. III 



(1855) p. 98 cum fig. Keeve Brit. Moll. (1863) p. 229. Mörch Syn. Moll. Dan. 



