114 C. A. Westerhind, Synopsis Molluscorum Exlramarinor. Scandin. 



Forma filocinda W. (Expose crit., 1871), t. carina expressa 



filiformi. utrinque sulco impresso terminata. 

 Forma ecarmata W. I. c, t. anfractu ultimo aperturam versus 



tereti, carina evanescente. 

 Forma lahiata W. 1. c, t. apertura intus labiata, labio albo, 



nitido, sat valido. 

 Forma catina W. (Exk Fauna, 1884'), t. supra subplana, sub- 



tus plus minusve concava. 

 Monstrositates multse (ut cc. t. supra concava, subtus convexa; 



/9. t. anfr. ultimo descendente, apertura centro adnatai; y. 



t. anfr. passim sejunctis, ultimo demum libero, etc), se- 



quentes quam maxime memorabiles: 



1. T. pja-amidalis, rufobrunnea, anfr. 6, lineares, superne 



truncati, ultimus fere acutangulus, convexus, apert. 

 circinnata, marginibus conjunctis, columellari ad um- 

 bilicum profundum et apertum late reflexo; alt. 7, 

 lat ad basin 5 mm. — Suec. ad E.ingsjon in Skane. 

 Woodward Manual of Moll. f. 97 optima. 



2. T. pyramidalis, squalida, cinerea, anfr. 5, convexi, 



sibi invicem fere perpendiculariter impositi, 4 & 5, 

 in ipso apice depressi, apertura circinnata ac cent- 

 rum perforatum; »long. 2^/3, lat. IY2 lin-» — Dania 

 in fossa limosa ad Frederiksdal (0. Morch). Nerita 

 contorta Miill. in Verm. Hist. 



Pl. carinatus Miill. (Verm. Hist. II, 1774). T. calcarea, pallida; 

 anfr. 5, celeriter accrescentes, ultimus dilatatus, extus com- 

 pressus, acute carinatus; apertura anguste ovalis, acute 

 angulata. Lat. 10 — 16 mm. 



Hah. Suecia in Skane fere ubique, in Blekinge tantum- 

 modo in maxime occidentali parte (in lacu Wesan ad Gammels- 

 torp et in Sisseback), Smaland (Jonkoping, Westraby, Romelsjo), 

 Oland (Resmo), Gotland (Dalhemsa par. Lojsta), Ostergotland 

 multis locis, Westergotland (in lacu Kopparsjon par. Molltorp), 

 Nerike (Skebiick et in Markkiirret, Mellosa et ad Broby par. 

 Viby), Stockholm (in lacu Trehorningen par. Brimnkyrka, Nacka), 

 Upland (ad Upsala), Dalarne (par. Gustaf et ad Siiter), Helsing- 

 land (ad BoIInas, Bjorktjiirn). — Dania vulgaris. — Fennia ad 

 Jalguba in Karelen, Riiimii in Kuopio et Riistavesi in stagno 

 Viilisalmi (K. M. L.). 



Forma nummularis Morch (Syn. Moll. Dan., 1864), t. compres- 

 sima, foliacea, insequaliter flexa. — Dania rarior. 



