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



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

 stagno turfoso ad HellebtTek (H. L.). 



A. opalina Kiist. (Mon. in Chemn, Gab. 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, recurva- 

 tulum producta, crista ssepe humilior, margo inferior elon- 

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

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

 Hab. Dania in Sjselland (in fossis circa Kjobenhavn, inter 



Farum So et Fuurso). 



Forma suhcylindrica, inflata, margine venti-ali recto; long. 105, 

 alt. 55 mm. — Dania in Fyen (Hofmansgave). 



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

 strtim breve v. brevissimum declive i^roducta, margo superior 

 arcuatus; crista dilatata, rotundata; umbones clepressi. 



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

 sat sohda, medio la3viuscula, nitidula, ad oras sulcatula, 

 postice in rostrum brevissimum, surrectum, submedianum, 

 rotundato-acuminata 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. 



Hab. Saecia in maxima meridionali parte prov. Skane (un- 

 de Rossmassler clarissimo Drouet olim specimina communicavit), 

 ad Stockholm (in Bredviken, Kumla et Kyrkviken in Lidingon 

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

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

 in Nachrichtsbl. Mal. Ges. 1894. 



A. Ihotelierii 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, vel pallide castanea, ad nates ru- 

 biginosa vel decorticata, margo superior valde ascendens, 

 angulo areali alto, inferior leviter arcuatus v, subrectus, 



