HAAS: ABIDA AND CHONDRINA. 269 



V. Conca del Llobregat, by A. Bofill & F. Haas. In : Treb. 

 Mus. Cienc. Nat. Barcelona, III, 1920, pp. 1-455, Taf. 

 1-4. 



VI. Conques del Besos, Ter. Fluvia, Muga i literals inter- 



mit jes, by A. Bofill, F. Haas & J. B. d'Aguilar-Amat. 

 In: Treb. Mus. Cienc. Nat. Barcelona, III, 1921, pp. 

 1-409 Taf. 1-4. 



VII. Vail d'Aran, by A. Bofill & F. Haas. In: Treb. Mus. 



Cienc. Nat. Barcelona, III, 1921, pp. 1-104, Taf. 1. 



Fagot's work — often cited by Pilsbry and myself, and very 

 hard to get — ' ' Catalogo razonado de los moluscos del valle del 

 Essera," appeared in the Cronica Cientifica de Barcelona, X, 

 1887— XI, 1888. In it, on pp. 127-131 and 191-194 of Vol. 

 XI, there is a complete list of all forms of the genera Abida 

 and Chondrina which Fagot considered valid species. 



1. Abida polyodon (Drap.). PI. 23, figs. 1, 2. 



Pilsbry, Vol. XXIV, p. 270, pi. 44, figs. 1, 2, 3. 



Nothing further is to be added to Pilsbry 's description 

 except that in some places in regions poor in lime, forms of 

 polyodon are developed in which peristomal folds are com- 

 pletely suppressed. Such specimens are mentioned in Est. VI, 

 p. 328, and one is figured, pi. 1, figs. 34, 35, from Setcases, 

 near Camprodon, Prov. Gerona, at 1200 m. elevation, where 

 it was found with seven other entirely similar examples. One 

 of these is drawn in pi. 23, fig. 1. 



It may further be mentioned that in a few localities speci- 

 mens occur which far surpass the size given by Pilsbry as 

 maximal. At Castelldefels, south of Barcelona, for instance, 

 no examples are known to me which fall below 10.5 mm. in 

 length, and one of the specimens I collected there measures 

 12 mm. long, 3.5 mm. diameter. 



A. polyodon is before me from more than sixty localities in 

 Spain. In nearly all of them there lives with the typical form 

 also a smaller one, corresponding to Kuster's var. ringicula. 

 According to Margier this variety is confined to the valleys 

 of the French eastern Pyrenees and those of the Dep. Aude, 

 while the typical form, unmixed with ringicula, lives in the 



