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. (\V.). 



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



A. gregalis Drt, (Journ. Conch. 1893). C. a:^quiconvexa, rugo- 

 sula, 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). 



Hah. Suecia Skane ad Dagstorp (unde Rossmassler claris- 

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

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

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

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

 ad Gorki 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- 

 pressee, plicatulae; crista elata; ligamentum breve, tenue, 

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

 alt. 40—44, cr. 20 — 26 mm. Juvenis kevis 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. suhovalis-ohlonga, antice brevis, postice 3°—4° longior, me- 

 dio altissima, utrinqiie subceqiialiter in rostrum longum, infra- 

 meclianum, 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. 



