i66 



NOTES ON HELIX (ACANTHINULA) HARPA, SAY, 

 AND ITS DISTRIBUTION. 



HANS SCHLESCH, 

 Hellerup, Denmark. 



1824 Helix harpa Say. Longs : Exp. VI., p. 256. 



1844 Pupa costulata Mighels. Proc. Boston. Soc. Nat. Hist. 



I., p. 187. 

 1847 Bulimus harpa Pfeiffer. Zeitschr. f. Mai., p. 147. 

 1856 Helix aculeata Miiller. Nordenskiold och Nyelander : 



Finlands Moll., p. 13. 

 1859 Helix amurensis Gerstfeldt. Land-und Susswasser Moll. 



Sibir u. Amur, p. 13. 



1864 Zoogenetes harpa Morse. Portl. Soc. Nat. Hist. I., 



p. 32, t. i., f. 1-12. 



1865 Helix harpa Say. Westerlund : Sv. Moll., p. 46. 

 ,, ,, Expose 1 crit., p. 57. 



Faun. Moll. Sv., Norv. 

 et Dan., p. 153. 

 ,, Esmark : Land and Fresh-water 

 Moll, in the Arctic Reg. 

 of Norway, p. 98. 

 Westerlund : Land och Sotvatten- 

 moll. ins. under Vega- 

 Exp. 

 Clessin : Moll. Fauna Oesterr, Ungarn 

 u. d. Schweiz, p. 793, f. 525. 

 Westerlund : Fauna palsearc. Reg. 

 leb. Binnenconch, p. 17. 

 1897 „ ,, ,, ,, Synop.Moll. ext. Scand., 



p. 46. 

 1901 ,, ,, ,, Luther : Land och Sotvattengast. 



utbred. i. Finland, p. 59. 

 1908 Acanthinula harpa Say. Odhner: Moll. d. Lappl., Hoch- 



gels, p. 140. 

 Testa ovata-turrita, tennis, virescens vel corneo-lutescens 

 sericina, confertim striatula et distanter membranaceo-costulata. 

 Spira elevata, obtusiuscula ; anfr. 4-4^, convexiusculi, ultimus 

 ventrosus, spiram subczquans ; sutura profunda, umbilicus 

 profundus, sed angustus ; apertura semi-ovalis et rotundato- 

 sublunaris ; peristoma simplex, acutum, margine columellari 

 subreflexo (Westerlund). 



Animal oviviviparum marginibus pedis profunde crenulatis 

 (Morse). Diam., 2-2| ; alt., 3^-4 mm. 



Helix harpa Say, is a typical arctic species, distributed over 

 North America, Asia and Europe, and is remarkable as the 

 largest of the subgenus Acanthinula, just as Pupa hoppii Moller, 

 from Greenland, is by far the largest Vertigo. Helix harpa 



Naturalist.. 



