Excerpt from Studies on the Cyclostomata Operculata
Many years ago I undertook a study of the Danish cretaceous Bryozoa the results of which have not yet been published, and among the species studied by me were also a small number belonging to the family Melicerititidae (eleidae d'orb.) to the members of which d'orbigny ascribes a calcareous operculum the presence of which, however, has been denied by all the later authors who interprete the supposed Operculum as a closure-plate of the same nature as that which has been found both in the Cyclostomata and the Cheilosiomata. I came however to the result that d'orbigny was right in his interpretation of the named structure, and I have published some remarks on this subject in my preliminary communication >studies on Bryozoa< As later I wished to make a more comprehensive study of this interesting group I extended my investigations 'over a number of foreign species, and in this effort I have been supported by several colleagues abroad. In the first instance I owe a debt of gratitude to Dr. F. Canu the author of so many valuable works on fossil Bryozoa, who has not only sent to me a large number of French species defined by him, but also helped me to acquire materials containing cretaceous bryozoa from a number of French localities. Asimilar material from a few other French localities has been' sent me by Mr. G. Dollfus, and to Mr. M. Filiozat who has made a special study of the cretaceous Bryozoa from Vendome I owe the possession of a number of species from that locality. For the gift or loan of specimens I am also indebted to Mr. A. W. Waters, Dr. E. Pergens, Prof. Dr. G. Steinmann, Bonn and Prof. Dr. H. Wegner, Munster, and lastly I have been able to acquire a collection of cretaceous Bryozoa from the Chatham chalk, by the aid of Mr. W. Gamble. To all these gentlemen I offer my sincere thanks.
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