26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 73 



Der Name der Familie (entgegen B. B. Woodward, der hierin irrt) wird 

 dadurch nicht beriihrt. 



Chapman reports : 



VII. It appears that Thepdoxis is untenable on account of the type being the 

 equivalent of Ncrita fluviatUis L. I would support the use of Neritina with 

 type N. pulligera L., 1766. 



The Other reports are as under Cerion. 



8. Clansilia Draparnaud, 1805, type C. rugosa Drap., 1805. Pilsbry and Baker 

 report : 



" Clausilia Drap. (1805, Hist. nat. Moll. France, pp. 24, 68), type designated 

 by Turton (1831, Man. Land and F. w. Shells Brit., I, p. 6), Turbo bidcns 

 Montagu (not Linne), which he includes (p. 75) in the synonymy of 

 Clausilia rugosa Drap. (^ Pupa rugosa Drap., 1801)." 



Discussion: Turbo hidens Montagu is not inckided in Drapar- 

 naud's paper under that name, and there seems to be some question as 

 to its identity with C. rugosa Drap. As Turton certainly treated the 

 two as identical, and this type designation is the first that can be 

 considered vaHd and is the one accepted by the (recent) splitters of 

 the original genus, it seems best to fix it. Later type designations 

 indicate Turbo bidens L. or Clausilia bidens Drap. or give no authority 

 for the species; all three (or four) "bidens" are identifications of 

 the Linnaean species but are now placed in three separate genera. 

 Clausilia is the earliest generic name in the Clausiliidae (Gastropoda 

 Pulmonata). 



Other reports as under Cerion. 



9. Vitrina Draparnaud, 1801, type Helix pcUncida Miiller, 1774. Pilsbry and 

 Baker report : 



"Vitrina Drap. (1801, Tabl. Moll. France, pp. 33, 98), monotype Vitrina 

 pcllucida, with Helix pellucida Miiller in the synonymy." 



Discussion: Vitrina is the prior name for the typical genus of 

 the Vitrininae and the earliest name in the Zonitidae (Gastropoda 

 Pulmonata). However, Draparnaud's specimens, as figured in his 

 more detailed work (1805), seem to have been what was later named 

 Helicolimax major Ferussac (1807). Montfort (1810, p. 239) chose 

 Vitrinus pellucidus (as the type of his emendation) but seems also 

 to have confused the two species. Children (1822-1823, p. 100) and 

 Gray (1847, P- 169) designated Vitrina pellucida (without authority). 

 Herrmannsen (1849, Index Malac, Vol. II, p. 696) seems to be the 

 first definitely to settle the genotype, and chose " Helix pellucida M." 

 As some writers now place the two species in separate genera, it 

 seems best to fix Vitrina exactly on one of them. 



