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



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

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

 tral! svibparallelis, parte posteriore medio obtuse conico, 

 dentes card, crassi, dens card, valvse dextrine subtransver- 

 salis, sed dentes srepe niorbosi et umbones sa^pe decorti- 

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

 land et Osteip-otland (in lacubus fundo limoso). Forma 

 minor et elonyata ad Stockholm (in loco Tyska botten 

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

 media. — Rossm. Icon. £. 204, Nord. & Nyl. Finl. Moll. 

 f. 73. 



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

 cuneiformis vel ovato-piriformis, veutricosa, viridibrunnea, 

 antice rotundata, sat prolongata, postice 272 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 Sjaslland (^in plerisque lacubus 

 majoribus fundo arenoso). — Fennia, Kotojarvi in Borgnas 

 (Mus. Helsingfors). 



Var. inctus Beck, Morch (Syn. 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, obscurius 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 — 35, cr. 23—25 mm. — Suecia in Skane — 

 Fennia ad Rantasalmi (Mus. Helsingf.). — M3^a ovata De- 

 novan, U. tumidus Eossm. Icon. f. 203, Dup. Hist. moll, t, 

 38 f 20. 



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

 steriore ad quintuplo longiore), antice prolongata, angu- 

 stata, rotundata, delude usque post medium dilatata, po- 



