154 C.-A. Westerlund, 



1. SPHiERIUM CORNEUM (Lin.). 



Concha subglobosa, subcordata, ventricosa, tenuis, transversim teiuiis- 

 sime striata, extus sordide virescenti-fusca, lutescenti tiiieta, sœpe margine 

 infero luteo-limbato, intus coerulea; umbones siibrotiindate obtusi, tumidi, pro- 

 niiauli; ligamentum inconspiciuim ; pars posterior anteriore vix altior; mar- 

 gines (coiichcß clausse) rotundate obtusi. Long. 10, alt. 8, crass. 7 mm.; spec, 

 max. 1. 14, alt. 11, or. 10 mm. 



Tellina cornea Linné Syst. Nat. X (1758) p. 658; Fauna Su. ed. 2. (17(11) p. 517. 



Tdlina rivalis Müller Veim. Hist. II (1774) p. 202. 



Spluerium corneum Scopoli lutr. Nat. Hist. (1777) p. 397. Jeffreys Brit. Conch. I 



(18G2) p. 5. Mörch Syn. Moll. Dan. (18G4) p. 70. Westerlund Sv. Moll. (1865) 



p. 122; Coll. Typ. Moll. Su. (18G8) n:o 11. 

 Cyclas cornea Nilsson Hist. Moll. Sn. (1822) p. 96. Stein Sehn. u. Musch. Berl. (1850) 



p. 108. t. 3. f. II. Friele Norske Moll. (1853) p. 50. Moquin-Tandou Moll. 



Fr. II (1855) p. 491. t. 53. f. 17—19. Malm Göteb. Vet., Vitt. Samh:s Handl. 



Ill (1855) p. 77. c. fig. Nord, et Xyl. Fini. Moll. (1856) p. 78. Reeve Brit. 



Moll. (1863) p. 238. 



ß stagnicoluui Shepp.: concha pallide straminea, unicoior. 



y nudeum Studer: concha parva, globosa, obscura; long. 7, alt. 7, 



cr. 6 mm. 

 Ô tomeiltosxim mh.: concha straminea, dorso obscure, tomento albido 



tenui obtecta. 

 £ mammilliimim mh.: concha subglobosa, umbonibus tumidis, obtiisis, 



superne mammillis magnis, planiusculis. 



Hah. In Suecia lifec concha ubique vulgaris, saltern per provin- 

 cias litorales usque ad Go" GO' 1. bor. (spec. 10,0 ram. longa, 8,ii ram. alta, 

 7,2 mm. crassa ad Sävast legit clar. v. Wallenberg), y pncl. passim , saltern 

 in Dalarne usque. ^ toment. copiose in palude ad Wesum prope Lund 

 prov. Skåne, s mammill. in Wesunis raosse prov. Skåne (C. A. W.) , in 

 Quillcbäcken ad Göteborg prov. Westergö tland (Malm!!), ad Kloster prov. 

 Dalarne (C. G. Andersson!!). In Norvegia ad Christiania non raro 

 (Friele). 



SPH^RIUM 'CONSOBRINUM Fer.? 



Concha orbiculato-subrliombea, compressa, subiuœquilateralis, postice la- 

 tior, subtruncata, antice magis rotundata, tenuis, pellucida, teniiiter striata, 

 cinerea vel lutescens, marginibus (conchœ clausa^) acutis; nates rainutaî, acuti- 

 usculte, umbonibus subdepressis. Long. 8, alt. 7, cr. 4 — 5 mm. (sp. max. 

 10 — 11 mm. longa). 



