Acta Societatis pro Fauna et Flora Fennica, XIII, N:o 7. 17o 



ventrali arcuatulo, postice longe recteque ascendente. Long. 



100—120, alt. 55—65, cr. 40—45 mm. 



Hah. Dania in ins. SJselland (in Emdrupso: H. S.) et 

 Fyen (ad Brahe-Trolleberg: A. F.). — Verosimiliter iiuc pertinet 

 A. cellensis var. 3. « minor (»C. incrassata, ventricosa, sordide 

 olivacea, nates ssepe ferruginei, ligamentum validissimum; long. 

 112, alt. 60 mm.») Morch in Syn. moll. Danise (in lacubus 

 Gjentofteso, Damhuussoen et Bavelseso inventa). 



(^6) C. mediocris, tenuis, fragilis, complanata, breve ovalis, luteo- 

 virescens, pars postica duplo longior, margo dorsalis suhhori- 

 zontalis, subrectus, ventralis totus regidariter arcuatus; aren 

 alta, valde compressa; umbones plane depressi. 



A. sturmi Bourg. (Moll. Aceph. I, 1881). C. subrecta, late ovata 

 vel irregulariter rhomboidea, lawigata, nitida, luteoviridis, 

 tenue radiata, ad umbones cinerascens vel ferruginea, an- 

 tice lata, rotundata, superne angulata, margine posteriore 

 recto, celeriter descendente, po.stice in rostrum breve, la- 

 tura, medianum compressa, ligamentum fere inconspicuum. 

 Long. 70—90, alt. 43—59, cr. 26 mm. (L. 106, a. 50 mm.: 

 A. cellensis v, intermedia Morch). 

 Hab. Suecia in Blekinge (in lacu Tresjon prope Bonneby: 



Hj. W.) nec non in et circa Miilaren (J. W.). — Dania in »So- 



erne» ad Kjobenhavn, Ladegaardsaaen, Leersoen et Lundehuus- 



soen. 



{7) C. late ovalis-subrhomhea, ventricosa, antice prolongata, postice 

 duplo longior, margine dorsali fere recto, ascendente, ventrali 

 plus minus arcnato; area magna, alta, forte angulata; umho- 

 nes tumidi. 



A. piscinalis Nilss. (Hist. MoII. Su. 1822) pr. p. C. crassiuscula, 

 pallide lutea, superne cinerea, natibus rubris, confertim 

 viride radiata, striata et obscurius zonata, antice rotun- 

 data, superne angulata, margine posteriore plus minus 

 concavo, ventrali fere regulariter et forte arcuato, postice 

 in rostrum subraedianum, subconicum, obtuso-truncatum 

 producta. Long. 100, alt. 60, cr. 30 mm. 

 Hah. Suecia a Skane (locus originalis est Dagstorp in fos- 



sis turfosis), ad Stockholm (in Bastadsjon: Hj. W.). — Dania 



