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



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

 nuato-obtusum medianum producta, margo dorsalis arcuatus, 

 angulo subnullo, ventralis arcuatulus; nates depressa^, erosse; 

 margarita pallide coerulescens, livide maculata vel albida, 

 ssepe 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. N.) 

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

 Soroso et Viborgso). 



Ohs. Descriptioneni allatam e speciminibus numerosis in lacu 

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

 proprio Rossmasslerl a loco originali (Grossenliayn Saxoniae) communi- 

 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 subeequahter attenuatoangustata et 

 obtusa, margo dorsahs subrecte et alte ascendens, area 

 alta, compressa et alata angulum peracutum cum margine 

 posteriore formans, margo ventralis regulariter arcuatus. 

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



Rah. Siiecia in Ostergotland (Kilarpsjon). — Dania in 

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



A. acutalis Drt. (Journ, Gonch., 1894). Concha ovahs, supra 

 medium ventrosula, infra medium forte compressa, laeviu- 

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

 subacutum inframedianum vel subbasale desinens, margo 

 dorsahs forte arcuatum, ventrahs subhorizontahs, sub- 

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

 — 16 mm, 

 Hah. Suecia in Dalarne (in Brunn.sjon: C. G. A.). 



A. nordenskibldi Bourg. (Moh. Aceph. L 1881). G. longa, eUiptica, 

 ohvaceo-viridis, rugis fuseis, ahitudine maxima accurate in 

 medio marginis superioris, a quo utrinque a^que descen- 

 dens et antice et postice seque angustata et rotundata, margo 



