340 The Ohio Naturalist. [Vol. VIII, No. 6, 



also the Cephalanthtts-Cornus zone and extending, as well, up the 

 sides of adjacent dunes and onto the adjacent xero phytic Sand 

 plain. 



Although very successful in competition with the Cephalan- 

 thus-Cornus and Rhus hirta Thicket Formation, it appears pro- 

 bable that this formation will eventually be succeeded by the 

 Ulmus-Acer Forest Formation. The structure of the Ailanthus 

 plandulosa Forest Formation, as to the lower lavers, is interme- 

 diate generallv between that of the thicket formations that 

 have been supplanted and that of the Uhnus-Acer forest. A 

 number of the species, such as Campanula americana, belong 

 more especially to the latter formation, but the conditions of 

 dense shade of the Ailanthus forest seem to have supplied the 

 conditions essential for its entrance into this habitat. 



Certain secondary successions are to be seen in several places 

 on Cedar Point, as brought about by the agency of man, but these 

 were not studied in detail by the writer. One of these successions 

 has been brought about by the effort made to have a lawn and 

 shrubbery in the vicinity of the buildings of the Pleasure Resort. 

 Another secondary succession marked by the appearance of a 

 number of ruderal species has been brought about by the throw- 

 ing aside of sand in connection with the dredging of the artificial 

 "Lagoons. " 



Carnegie Museum, January 20, 1908. 



THE MURMAN BIOLOGICAL STATION. 



Sergius Morgulis. 



To the observer abroad, in Europe and more especially in 

 America, Russia is still vested with clouds of mystery. This is 

 true even with regard to the scientific Russia, slightly known in 

 other countries, which of course is due primarily to the Russian 

 language being familiar only to very few scientists. 



This note is intended to acquaint the reader with a neglected 

 scientific institution, of no small rank, and is compiled largely 

 from reports kindly placed in my possession by Dr. K. M. 

 Derjugin, Curator of the Station. 



Marine Biological Stations arc the workshops of biologists, 

 and ever since students of nature have abandoned their air-tight 

 laboratories, stored up with pickled specimens, and migrated to 

 the shores of the open sea, where they came in direct touch with 

 an exuberant living world, our science has progressed by 

 strides. This "migratory humor" effected also the Russian 

 biologists, and the famous embryologist Kovalevsky succeeded 

 in founding a Biological Laboratory on the coast of the Black 



