174 C. A. Westerlund, Synopsis MolJuscorum Extramarinor. Scandin. 



ad Bjornedam, Tranebjerg, Samso, in piscina ad Skaaninge et 

 stagno turfoso ad Hellebaek (H. L.)- 



A. opalina Kiist. (Mon. in Chemn. Cab. 1852). C. ut piscinalis, 

 sed medio maxime ventricosa, marginibus acutis, compres- 

 sis, dense striata et plane sulcata^ in area et ad oras la- 

 mellata, antice late rotundata, pars posterior in rostrum 

 cuneatum latum, truncatum fere, inframedianum, reeurva- 

 tulum producta, crista seepe humilior, margo inferior elon- 

 gato-curvatus. Long. 100, alt. 67, cr. 30 mm. (125—69 

 — 44 mm.). — (A. radiata v. paludosa Morch.). 



Hal. Dania in Sjaelland (in fossis circa Kjobenhavn, inter 



Farum So et Fuurso). 



Forma suhcylindrica, inflata, margine ventrali recto; long. 105, 

 alt. 55 mm. — Dania in Fj'^en (Hofmansgave). 



(8) C. late ovata, convexa, antice late seynicircularis, postice in ro- 

 strum breve v. hrevissimum declive iwoducta, margo superior 

 arcuatiis; crista dilatata, rotundata; umbones depressi. 



A. retziana Drt. (Journ. Conch. 1893). C. convexo-compressa, 

 sat solida, medio leeviuscula, nitidula, ad oras sulcatula, 

 postice in rostrum brevissimum, surrectum, submedianum, 

 rotundato-acurainata desinens, pallide olivacea vel leete vi- 

 ridula, fusco-zonatula, margo superior, anterior et inferior 

 (postice usque ad medium) forte arcuati. Long. 75—82, 

 alt. 50 — 55, cr. 22 — 25 mm. 



Hah. Siiecia in maxima meridionali parte pro v. Skane (un- 

 de Rossmassler clarissimo Drouet olim specimina communicavit), 

 ad Stockholm (in Bredviken, Kumla et Kyrkviken in Lidingon 

 nee non in Djurgardsbrunnsviken: Hj. W.), in Upland (Lang- 

 sjon: E. N.). — Dania in Sjselland (Emdrupso: H. S.). West, 

 in Nachrichtsbl. Mai. Ges. 1894. 



A. Ihotelleril Drt. (Journ. Conch. 1892). C. convexa, ad oras 

 striato-lamellosa, nitidula, postice margine longo forte de- 

 clivi in rostrum breve, obtusum, inframedianum v. sub- 

 basale desinens, fusca, \el pallide castanea, ad nates ru- 

 biginosa vel decorticata, margo superior valde ascendens, 

 angulo areali alto, inferior leviter arcuatus v. subrectus. 



