38 G. LINDSTKOM, ON THE SILURIAN GASTKOl'UDA AND PTKUOPUDA OF GOTLAND. 



Prolcssor B. Lundguen lias scut ine spccinieiis t'roiii the Museum of Lund and Lector 

 Stenijeug fVoni the Museum of the town of Mahno, Prof. JoiiN.sTRUr in Copenhagen 

 has sent me from the Mineralogieal Museum of the University the wliole collection of 

 Silurian Gastropoda of Gotland formerly made by Angelin and others, Dr L. KOLMODIN, 

 0. A. Westoo and M. Klintbehg have lent me specimens from the Museum of the 

 College of Wisby and also from private collections. From the Academician Fkiedk. 

 Schmidt 1 received what he had collected in Est land and Oesel. Messrs John Ghay in 

 Hagley, John E. Lee in Torquay, Hendekson and James Simpson, both in Edinburgh, 

 presented to the State Museum specimens of English and Scottish Silurian Gastropoda. 

 Good collections were also sent from Prof. A. H. VVortiien in Springfield and Mr S. 

 A. MiLLEii in Cincinnati togetlier with information on American fossil Gastropoda. 

 My tiianks are also due for many good elucidations and specimens to Professors 

 Beyrich and Dames in Berlin, P. T. Cleve in Upsala, W. H. Uall in Washington, 

 H. Douville in Paris, J. Hall in Albany, Dr J. G. Hinde in London, who kindly 

 undertook to send me casts of some critical species, M. D. Oehlekt in Laval for a 

 fine collection of Devonian fossils. Prof. Feud. Roemeu in Breslau, Prof. H. Tkaut- 

 SCHOLD in Moskwa, Lector S. L. Tornquist in Lund and Mr J. F. Whiteaves in Ottawa, 

 Canada. To all these friends I have to express the deep obligation under whicli I 

 lie for their kindness to promote my work. 



I have been most fortunate to have had the assistance of an excellent draughts- 

 man, Hr G. LiLJEVALL, in the execution of the plates. He has not only drawn on 

 stone all the figures with the exception of the plates XV and XVIII, but also cleaned 

 and prepared the original specimens before they were figured and he had his full share 

 in our common interest for the work. His plates speak for themselves and are in no 

 need of my praise. 



