Eeference List of South African Non-marine Mollusca. 161 



1841 Helix aspersa, Miill., Pfr., Conch. Cab. p. 34. pi. 3, f. 6-10. D.F. 

 1846 ,, ,, ,, p. xi. D. 



1848 Mon. Hel. i. p. 241. D. 



1850 Desh., Hist. Nat. Moll. i. p. 269. pi. 18, 



f. 1-13. pi. 19, f. 1-9. pi. 2lB, f. 6, 7. 

 pi. 24, f. 3. pi. 24A, f. 1-7. D.F. 

 1855 ,, ,, Moq.-Tand., Hist. Nat. Moll. Fr. ii.p. 174. 



pi. 13, f. 14-32. D.F.A. 



1861 ,, spumosa, Lowe, A.M.N.H. vii. p. 111. D. 

 1879 ,, aspersa, Miill., Layard, The Field, Jan. llth. N. 

 1883 ,, (Pomatia) aspersa, Miill., Tayl., Journ. of Conch, iv. p. 89. 



D.N.A. 



1898 Pomatia aspersa, Miill., Stur., S.A. Moll. p. 52. N. 

 1903 Helix (Helicogena) aspersa, Miill., Kob., Conch. Cab. p. 96. 



pi. 319, f. 14-20. pi. 320, f. 1-12. D.F. 

 1910 ,, (Cryptomphalus) aspersa, Miill., Tayl., Mon. Brit. Moll. 



p. 236. pi. 23 (1911). D.F.A.E. ' 

 ,, ,, (Helicogena) aspersa, Miill., Bttg., Abh. Senckenb. Naturf . 



Ges. Frankfurt, xxxii. p. 456. N. 



Specimen ex coll. Miiller in University Zool. Mus. Copenhagen. 

 Hob. CAPE OF GOOD HOPE. Port Elizabeth (in coll. Ponsonby). 

 CAPE PENINSULA. Very common. Eobben Island (in coll. Pon- 

 sonby). 



Several sinistral specimens have been found at Cape Town 

 (Lightfoot). 



This species, said to have been introduced into Cape Town by 

 Mons. Dastre, as a table delicacy, about 1870, has now become one 

 of the greatest pests in gardens throughout the Cape Peninsula. It 

 appears also to thrive on the peculiar local type of wild herbage, 

 and thus threatens to oust many of the rarer, indigenous species 

 from their last foothold, by eating them out of house and home. 



SUB-GENUS OTALA, Schumacher, 1817. 



(Essai d'un Nouveau Systeme des . . . Vers. p. 191.) 

 ( = Archelix, Albers, 1850.) 



Type of Sub-Genus, H. atomaria, Schum. (lactea, Miill.) 



300. HELIX LACTEA, Miiller. 



1774 Helix lactea, Miill., Verm. ii. p. 19. D. 



1786 Chem., Conch. Cab. ix, 2. p. 127. pi. 130, 



f. 1161. D.F. 



