178 C. A. Westerhmd, Synopsis Molluscorum Extramarinor Scandin. 



diata, antice declive rotundata, postice duplo longior, rostro 

 rotundato-truncato, margo superior arcuatulus, ascendens, 

 posterior subrectus, lente descendens, inferior regulariter 

 extense arcuatus, Sc^pe medio leviter retusus; area modica, 

 angulata. Long. 78—85, alt. 43 — 48, cr. 25 — 28 mm. (1. 

 100, a. 53 mm.: Morch). 



Hab. Sitecia in Blekinge (in Tresjon prope Ronneby: Hj. 

 W.). — Dania in Sjselland (Albertslund ad Taastrup, Aero) et 

 Jylland (Rindsholm ad Viborg). 



A. ISBvigata Drt. (Journ. Gonch. 1893). G. ovata, obUque ventri- 

 cosa, medio infra medium sat forte compressa, Isevigata, 

 rugis incrementi paucis (c. 5), distantibus, fuscis, nitida, 

 antice rufescens, postice virescens vel virescenti-cornea, 

 superne postice radiis duobus fuscis, vel ohvacea, postice 

 fusca, umbonibus rufuhs, margo superior arcuatus, inferior 

 horizontahs, postice ascendens, in rostrum truncatuhim 

 medianum desinens; nates depressse, area impressa crista 

 media. Long. 70 — 80, aU. 43 — 45, cr. 27 — 30 mm. 

 (West. L c.) 



Hah. Suecia in »Tyska botten» lacus Malaren* (V. L.), 

 Sodermanland (ad Dalbyo: E. N.) et in Ekolssundsviken ad 

 Stockholm (R. H.). 



A. nilssoni Kstr. (Mon. in Chemn. Gab. 1852). G. recta, sublan- 

 ceolato-ovata, modice ventricosa, striatula, rugis paucis 

 obscuris, virescens vel oUvaceo-lutescens, ad umbones 

 ferruginea et cinerascens, postice rufescens, radiis duobus 

 latis fuscis, antice sat producta, non angulata, postice in 

 rostrum sat longum, submedianum, latum, obUque trunca- 

 tum producta, margo superior convexus, posterior abrupte 

 subrecte descendens, inferior fere totus arcuatus, postice 

 subrecte ascendens ; area aUa, angulata. Long. 106, aU. 

 55, cr. 35 mm. 

 Hah. Suecia meridionaUs et media passim. 



A. baudoniana Drt. (Journ. GoncU. 1893). G. ovata, parum con. 

 vexa, tenuis, brunneo-virescens, postice in rostrum breviter 



