Acta Societatis pro Fauna et Flora Fennica, XIII, n:o 7. 189 



tundato-obtusa, antice paullo latior, postice in rostrum atte- 

 QLiato-obtusum medianum producla, margo dorsalis arcuatus, 

 angulo subnullo, ventralis arcuatulus; nates depressse, erosae; 

 margarita pallide coerulescens, livide maculata vel albida, 

 saepe incrassata. Long. 75—85, alt. 37—45, cr. 16- 

 23 mm. 



Hah. Suecia in Skane (Keflingea), Ostergotland (Skenan et 

 Svartan), Westergotland (in fl. Lidan), Upland (Lanna: E. K.) 

 et Dalarne (in lacu Honsan par. Husby). — Dania in Tiisso. 

 Soroso et Viborgso). 



Obs. Descriptionem allatam e speciminibus numerosis in lacu 

 Honsan Dalekarlice ab amico C. G. Andersson collectis et iis e manu 

 proprio Eossmassleri a loco originali (Grossenhayn Saxonise) commuui- 

 catis omnino congruentibus clariss. H. Drouet cum figura correspon- 

 dente ad dispositionem benigne misit. 



A. microptera Borcherd. (Abh. naturw. Bremen, 1888). C. elliptica, 

 antice et postice medio subseqnaliter attenuato-angustata et 

 obtusa, margo dorsalis subrecte et alte ascendens, area 

 alta, compressa et alata angulum peracutum cum margine 

 posteriore formans, margo ventralis regulariter arcuatus. 

 Long. 58, alt. ad umb. 24, ad ang. 32, cr. 15 mm. 



Hah. Suecia in Ostergotland (Kilarpsjon). — Dania in 

 Thorso ad Silkeborg et in rivulo ad Vigersdal (H. L.). 



A. acutalis Drt. (Journ. Conch., 1894). Concha ovalis, supra 

 medium ventrosula, infra medium forte compressa, la3viu- 

 scula, nitida, viridis vel fusca, postice in rostrum attenuato- 

 subacutum inframedianum vel subbasale desinens, margo 

 dorsalis forte arcuatum. ventralis subhorizontalis, sub- 

 rectus. Long. 50—55, alt. at umb. 25, medio 33, cr. 13 

 — 16 mm. 



Hah. Suecia in Dalarne (in Brunnsjon: C. G. A.). 



A. iiordenskibldi Bourg. (Moll. Aceph. I. 1881). C. longa, elliptica, 

 olivaceo-viridis, rugis fuscis, altitudine maxima accurate in 

 medio marginis superioris, a quo utrinque asque descen- 

 dens et antice et postice a3que angustata et rotundata, margo 



