Acta Societatis pro Fauna et Flora Fennica, XIII. N:o 7. 175 



postice perparum ascendens. Long. 55 — 70, alt. 40 — 55, 



cr. 23—24 mm. (W.). 



Hah. Suecia in Upland (in Langsjon: E. N,). 



A. gregalis Drt, (Journ, Conch. 1893). C. ccquiconvexa, rugo- 



suia, postice in rostrum breve, attenuato-subacutum, in- 



framedianum desinens, castaneo-rubicata vel brunnea, ad 



nates rubiginosa, margo superior arcuatus, inferior vix 



convexus, antice arcuato-ascendens. Long. 80—100, alt. 



45—60, cr. 30—32 mm. (West. 1. c). 



Hab. Suecia Slvane ad Dagstorp (unde Rossmassler claris- 



simo Drouet specimina misit), Wermland (ad Carlstad in portu), 



Gotland (in palude ad Tingstade : V. L.) et Ostergotland (in En- 



sjon prope Norrkoping: J. \\\). — Fennia in lacu Lojo in 



amne Aura ad Hallisfors, in Aland in palude ad Torpby et 



ad Gorl\i in flum. Svir: (Mus. Helsingf.). 



A. convexa Drt. (Journ. Conch. 1888). C. ovalis, convexa, su- 

 pra arcuata, postice in rostrum breve, attenuato-truncatu- 

 lum producta, tenuis, sulcatula, olivacea; umbones de- 

 pressae, plicatuiee; crista elata; ligamentum breve, tenue, 

 sinu brevi; margarita pallide coerulescens. Long. 62 — 72, 

 alt. 40—44, cr. 20 — 26 mm. Juvenis la^vis et nitidissima 

 est, pallide flavida, crista virescenti, convexior quam apud 

 species affines in statu juvenili. 

 Hah. Dania in lacubus ad Soro, Esrom et Hvidkilde 



(H. L.). 



(9) C. subovalis-oblonga, antice brevis, postice 3° — 4° longior, lue- 

 (lio altissima, utrinque subcequaliter in rostrum longum, infra- 

 medianum, late truncatum angustata; margo ventralis recti- 

 usculus. 



A. rostrata (Kok.) Rossm. (Icon. f. 284, 1836). C. perobliqua, 

 subrhombea-oblongata, compressiuscula, fuscula, nigrocingu- 

 lata, tenuis et fragilis, antice angustata, rotundata, margo 

 dorsalis rectiusculus, valde ascendens, posterior a^que et 

 sensim descendens, ventralis subrectus ; area longissima, 

 alta, utrinque sulcis tribus atroviridibus limitata. Long. 

 75—100, alt. 43—46, cr. 28—35 mm. 



