268 HAAS: ABIDA AND CHONDRINA. 



adherents of the school of Bourguignat. In the collection of 

 the Senckenberg Museum at Frankfurt a. M. there are also at 

 my disposition the types and cotypes of Rossmassler, which 

 he had received from such authors as Kuster, Moquin-Tandon, 

 Terver and Charpentier; and in the same museum are to be 

 found the collections of Boettger and Kobelt, with much val- 

 uable material for comparison from Asturias and southern 

 Spain. 



With such wealth of material as a basis, many questions 

 admit of solution which Pilsbry could not take up in his 

 treatment of the Pyrenean and Iberian species ; and again, in 

 many cases the conclusions differ from those accepted by Pils- 

 bry, working with single or few specimens, or often wholly 

 dependent upon published accounts. 



In my account of the several species the sequence of Pils- 

 bry 's monograph is followed, and references to the literature 

 are repeated only when they appear to be essential. The 

 rather extensive Spanish literature, hardly known in other 

 countries, is cited in the published Studies of the Malacology 

 of the Catalonian Valleys of the Pyrenees, so that I have gen- 

 erally confined my references herein to the latter. As these 

 seven Studies must often be cited, the full titles are given 

 here; in the text they are cited in the abbreviated form Est. 

 I, II, and so on. 



Estudi sobre la malacologia de les vails pirenaiques. 



I. Estudi sobre la fauna malacologica de la vail de l'Essera, 

 by A. Bofill, F. Haas & J. B. d 'Aguilar-Amat. In: 

 Treb. Inst. Cat. Hist. Nat., Barcelona, 1919, pp. 9-110, 

 Taf. 1-4. 

 II. Vail del Noguera Ribagorcana, by A. Bofill & F. Haas. 

 In: Treb. Mus. Ciene. Nat. Barcelona, III, 1920, pp. 

 1-95, Taf. 1-3. 



III. Vail del Noguera Pallaresa, by A. Bofill & F. Haas. In : 



Treb. Mus. Cienc. Nat. Barcelona, III, 1920, pp. 1-115, 

 Taf. 1-3. 



IV. Vail del Segre i Andorra, by A. Bofill & F. Haas. In: 



Treb. Mus. Cienc. Nat. Barcelona, III, 1920, pp. 1-149, 

 Taf. 1-3. 



