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



diata, antice declive rotundata, postice duplo longior, rostro 

 rotundato-truncato, margo superior arcuatulus, ascendens, 

 posterior subrectus, lente descendens, inferior regulariter 

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

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

 too, a. 53 mm.: Morch). 



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

 \V.). — Dania in Sjeelland (Albertslund ad Taastrap, Aero) et 

 Jylland (Rindsholm ad Viborg). 



A. laevigata Drt. (Journ. Conch. 1893). C. ovata, oblique ventri- 

 cosa, medio infra medium sat forte compressa, laevigata, 

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

 antice rufescens, postice virescens vel virescenti-cornea, 

 superne postice radiis duobus fuscis, vel olivacea, postice 

 fusca, umbonibus rufulis, margo superior arcuatus, inferior 

 horizontalis, postice ascendens, in rostrum truncatulum 

 medianum desinens; nates depressee, area impressa crista 

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

 (West. 1. 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 Ghemn. Cab. 1852). C. recta, sublan- 

 ceolato-ovata, modice ventricosa, striatula, rugis paucis 

 obscuris, virescens vel olivaceo-lutescens, ad umbones 

 ferruginea et cinerascens, postice rufescens, radiis duobus 

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

 rostrum sat longum, submedianum, latum, oblique trunca- 

 tum producta, margo superior convexus, posterior abrupte 

 subrecte descendens, inferior fere totus arcuatus, postice 

 subrecte ascendens; area alta, angulata. Long. 106, alt. 

 55, cr. 35 mm. 

 Hal). Suecia meridionalis et media passim. 



A. baudoniana Drt. (Journ. Conch. 1893). C. ovata, parum con. 

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



