38 G. LINDSTKÖM, ON THE SILURIAN GASTKOrUDA AND PTEUOPODA OF GOTLAND. 



Professor B. Lundgren lias sent ine spcciiiieiis from tlie Museum of Lund and Lector 

 Stenbeug fiom the Museum of tlie town of Malmö, Prof. JoHNSTRur in Copenhagen 

 has sent mc from the Mineralogical Museum of the University the whole coUection of 

 Silurian Gastropoda of Gothmd formerly made by Angelin and others, Dr L. Kolmodin, 

 O. A. Westöö and M. Klintberg have lent me specimens from the Museum of the 

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

 SciiMiDT 1 received what he had collected in Estland and Oesel. Messrs John Gray in 

 Hagley, John E. Lee in Torquay, Henderson and James Simpson, both in Edinbui-gh, 

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

 Good collections vvere also sent from Prof. A. H. Worthen in Springfield and Mr S. 

 A. Miller in Cincinnati together with information on American fossil Gastropoda. 

 My thanks are also dne for many good elucidations and specimens to Professors 

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

 H. DouviLLÉ 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. Oehlert in Laval for a 

 fine coUection of Devonian fossils. Prof. Fekd. Roemer in Breslau, Prof. H. Traut- 

 schold in Moskwa, Lector S. L. Törnquist in Lund and Mr J. F. Whiteaves in Ottawa, 

 Canada. To all these friends I have to express the deep obligation under which 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 XVHI, but also cleaned 

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

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

 need of my praise. 



