148 C. A. Westerhind, Synopsis Molluscoriim Extramarinor. Scandin. 



lis, non angiilata, antice paullisper angustata. postice late 



rotundata, superne ad mitrellas ventricosa, dein convexa, 



ad margines compressa, acuta, tenuis, corneocinerea v. 



infra flavescens, striata, nitens, margine supero leviter, in- 



fero sat forte areuato; umbones convexi, humiles, mitrellis 



magnis v. maximis, horizontalibus v. extus dilatatis, forte 



striatis. Long. 4^2, alt. 3V2, cr. 2V2 mm. 



Hah. Suecia ad Ronneby (in stagno parvo pone viam ad 



Kallinge '•') et ad Stockholm (Gangsatra: J. W.). Ceteroquin haec 



species in Bohemia, Germania et Britannia, ubi tamen pro S. 



ryckholti sumitur. 



ff Umbones non inflatL superne incurvi, mitrellis intus oblique 

 versis. 



S. brochonianum Bourg. (Mon. Sphter. Fr., 1854), G. oblongo- 

 ovata, subsequilatera, angulata, tenuissima, superne ad um- 

 bones ventrosula, deinde celeriter et forte complanata, ad 

 margines acutissiraa, corneocinerea, fascia et marginibus 

 ssepe pallidis, antice deorsum angustata et producta, po- 

 stice lata, oblique truncata; umbones sursum celeriter an- 

 gustati, mitrellis parvis. Long. 10, alt. 8, or. 4 mm. 



Hah. Suecia ad Goteborg (in canali quadam in urbe, nee 



non in rivulo Qvillebacken: C. calyculata var. A. Malm Goteb. 



Soc. Handl. Ill, 1855 cum fig.). 



Var. steini A. Schm. (Zeitschr. £. Malak., 1858): c. rotundior, 

 ventricosior, inferne compressa, superne minus distincte 

 angulata, margine superiore curvatulo et mitrellis minimis, 

 pars anterior conchse multo minus producta; long. 7, alt. 

 6 — 7, cr. 4 mm. — Forma major., 12 — 10 — 7 mm. — Suecia 

 passim a Skane usque in Dalarne (ad Sater). — Korv. meri- 

 dionalis. — Dania in Jylland (Asmilds Have ad Viborg : 

 C. M. Poulsen, Horsens: H. Lynge); certe etiam in insu- 

 lis, — Fennia, ut ad ostium flum. Uleaelf, Frugard, Ori- 

 mattila, Ingo et ad Finnb}^ in Aland (Mus. Helsingf). 



S. ryckholti Norm. (Note nouv. Cycl., 1844, Gyclas) var. clani- 

 cum Gl. ap. W. (Fauna Suec, 1873). G. subtriangularis, 

 imequilateralis, infra angulata, superne ventrosa, deinde 

 lente et leviter compressa. ad margines acuta, cinereo- 

 flavida v. coerulescens, tenue striata, antice forte declivis 



