164 C. A. Westerhmd, Synopsis Molluscorum Extramarinor. Scandin. 



Var. limicola Morch (Syn. moll. Dan. 1864): c. ovali-piriformis, 

 longa, castaneo-nigricans, unicolor, margine dorsali et ven- 

 trali subparallelis, parte posteriore medio obtuse conico, 

 dentes card. crassi, dens card. valvfe dextras subtransver- 

 salis, sed dentes saepe morbosi et umbones seepe decorti- 

 cati; long. 85, alt. 40, cr. 26 mm. — Suecia in Skane, Sma- 

 land et Oster.^otland (in lacubus fundo limoso). Forma 

 minor et elonyata ad Stockholm (in loco Tyska botten 

 dicto: V. L.). — Dania in Sjselland. — Fennia merid. et 

 media — Kossm. Icon. f. 204, Nord. & Nyl. Finl. Moll. 

 f. 73. 



Var. conus Spengl. (Skrivt. Nat. hist. Selsk. 1793) : c. oblique 

 cuneiformis vel ovato-piriformis, ventricosa, viridibrunnea, 

 antice rotundata, sat prolongata, postice 2^/^ longior, in 

 rostrum inframedianum vel subbasale angustata, margine 

 posteriore regulariter extenso ad basin descendente, ven- 

 trali recto, antice ascendente, dens card. subrectangularis, 

 crassus; long. 52—64, alt. 27 — 32, cr. 20 — 25 mm. — Sue- 

 cia in Skane. — Dania in Sja^lland (in plerisque lacubus 

 majoribus fundo arenoso). — Fennia, Kotojarvi in Borgnas 

 (Mus. Helsingfors). 



Var. pictus Beck, Morch (Sjai. moll. Dan. 1864) : c. oblique 

 cuneiformis, olivaceo-viridis, ventricosa, parte anteriore 

 brevi subrotundato, posteriore triplo longiore in rostrum 

 inframedianum sat acutum elongato, margine superiore ad 

 basin bene arcuato, ventrali elongato-arcuato, umbones va- 

 lide tuberculati, tumidi, dens card. brevis, subtrigonus, 

 crassus; long. 48—50, alt. 24—28, cr. 16—18 mm. ~ Sue- 

 cia in Skane (ut in Kaflingea). -•■ Dania in Ladegaardsaaen 

 ad Kjobenhavn. 



Var. tumidulus Loc. (Contrib. XIII, 1889) : c. ovalis, sat brevis, 

 flavoviridis, obscuiius radiata, mediocriter ventricosa, an- 

 tice rotundato-descendens, superne angulata, postice duplo 

 longior, in rostrum medianum, breve, sat acutum producta, 

 margine superiore parum arcuato, descendente, ventrali 

 elongato-curvato, antice fortius, umbones sat prominentes, 

 dens card. subconicus, altus, tenuis, sat longus; long. 62 

 — 68, alt. 33— .85, cr. 23 — 25 mm. — Suecia in Skane — 

 Fennia ad Eantasalmi (Mus. Helsingf.). — Mj^a ovata De- 

 novan, U. tumidus Rossm. Icon. f. 203, Dup. Hist. moU. t. 

 38 f. 20. 



Var. saccafus Rossm. (Icon. f. 969, 1859): c. oblonga (part. po- 

 steriore ad quintuplo longiore), antice prolongata, angu- 

 stata, rotundata, deinde usque post medium dilatata, pn- 



