I08 LAND AND FRESH WATER MOLLUSKS 



25, 28, 47, 1805. — RoissY, Moll., V, p. 223, 1805. — BowDicH, Elem. 

 Conch., I, pp. 24, 63, 1822; A. _/fii7'ia/i7is selected as type. — Nilsson, 

 Hist. Moll. Sveciae, p. 83, 1822. — Lamarck, Hist. An. s. Vert., vi, 2, 

 p. 25, 1822. — Beck, Ind. Moll., p. 123, 1837 ; A. fluviatilis L., 1st sp. 

 — Haldeman, Men. Limn., p. 14, 1842. 



Ancyc/us Sa\, Nicholson's EncycL, 3d ed., 11, p. 14, 1819. 



A7icylastru»i (sp.) Bourguignat, P. Z. S., 1853, p. 79, July, 1854. — Clessin, 

 Conch. Cab., ed. II, p. 10, 1880; A. flit'inatilis selected as type. — 

 Fischer, Man. Conchyl., p. 504, 1883. — Tryon, Struct, and Syst. 

 Conch., Ill, p. 107, 1884 ; txoX. Ancylasiruin Bourg., 1853, typical. 



Ansulus sive Ansylus Gray, \r\ Turton, Man., p. 247, 1840. — Herrmann- 

 sen, Ind. Gen. Mai., i, p. 52, note 13, 1846. 



v4«ir///;« Graells, Cat. Moll. Espana, p. 22, 1846; err. typ. ? 



'y- Haldcmania Clessin, 1880, not of Tryon, 1862. 



Subgenus Acroloxus Beck. 



Acroloxus Beck, Ind. Moll., p. 124, 1837, ist sp. A. radiatus Guilding, 1828, 

 not of Orbigny, 1825 ; also includes A. lacus/fis {l^.) Miiller ; Herrmann- 

 sen, Ind. Gen. Mai., I, p. 16, 1846, selects A. lacustris as type. — W. 

 G. BiNNEY, Land and Fw. Sh. N. Am., 11, p. 147, 1865. 



Acroxus Bourguignat, J. de Conchyl., iv, p. 169, 1853; a modification of 

 Acroloxus Beck. 



Velletia Gray, in Turton, Man., pp. 66, 230, 250, 1840 ; sole ex. A. lacustris 

 Miiller. — Haldeman, Mon. Limn., p. 14, 1842. — Gray, P. Z. S., 

 1847, p. 181 ; A. lacustris. — Bourguignat, J. de Conchyl., iv, p. 63, 

 1853 ; P. Z. S., 1853, p. 79, July, 1854. — Fischer, Man., p. 504, 1883. 



Subgenus Ancylastrum Bourguignat. 



Ancylastrum Bourguignat, Joum. de Conchyl, iv, pp. 63, 170, 1853 (Feb.), 

 A. ciimingiantis Bourguignat (Tasmania) selected as type ; P. Z. S., 

 1853, p. 91 (not p. 80), 1854. — Hedley, Proc. Mai. Soc, i, p. 118, 1894. 

 Not Ancylasinim Clessin, 1880, and Westerlund, 1902. 



Cumingia Clessin, Conch. Cab., ed. 11, pt. 299, Mon. Aiicyhis, p. 10, 1880; 

 type A. cufniftgianus Bourg. — Tryon, Struct. Syst. Conch., Ill, p. 107, 

 1884. Not Cumingia Sowerby, P. Z. S., 1833, p. 34. 



Legrandia Hanley, Proc. Roy. Soc. Tasmania for 1871, p. 27, 1872. Type 

 A. cumi7igianus Bourg. 



.^ Subgenus Gundlachia Pfeiffer. 



GunaMchia Pfeiffer, Zeitschr. fiir Mai. for 1849, P- 97' 1850; type CP. 



ancyliformis Pfeiffer, Cuba ; cf. Nordenskibld, Zool. Anz., xxvi, pp. 590- 



593, July, 1903; and Dall, Nautilus, xvil, Jan., 1904, pp. 97-8, 1904; 



also J. G. Cooper, Proc. Cal. Acad. Sci., vi, p. 26, 1875. 

 Potyia Bourguignat, Spicil. Mai., xciv, Jan., 1862, Rev. de Zool., p. 13, 



1862. Sole ex. P. gundlac hioides Bourg., = Gundlachia test, juv.fide 



Fischer. 



The genus Ancylus cannot be cited as of Geoffroy, first, because 

 that author did not adopt tlie Linnean nomenclature, and secondly, 

 because his only species was identified by him v\'ith Patella lacustris 

 L., which is the type of Acrolox2(s^ and, though Bourguignat and 



