THE ZOOLOGICAL STATION AT NAPLES 217 
is brought about by the stimulation of the electric nerve, which in turn 
acts upon very minute electric rods that release the electricity. 
Above the aquarium is the library. In the north room are found 
in complete series all the most important biological journals. In the 
south room are the separate volumes, monographs and authors’ reprints. 
The current numbers of journals and the latest publications from all 
parts of the world are found upon central tables. The classification 
and arrangement of the books is simple and the card-catalogue complete. 
Each worker is given cards bearing his special number in the general 
list and he inserts one of these cards in the place of the book desired. 
Dr. Schoebel, the librarian, is always ready with assistance in case of 
need. On the walls are notable frescoes by Hans v. Marees, one of the 
group of four especial friends of Dohrn when, in 1871, he was Privat- 
dozent at the University of Jena. In the fresco. on the east wall, Dohrn 
and these four friends, the biologist Kleinenberg, Charles Grant, the 
author of “Tales of Naples and the Camorra,” the artist himself and 
the sculptor Hildebrand, are represented as grouped about a table at 
the ruins of the Palazzo di Donn’ Anna on the Posilipo. In two other 
scenes, first Neapolitan fishermen are carrying the net from the shore 
and launching their boat and then four stalwart fishermen are rowing, 
standing in their characteristic manner and bending forward with each 
push upon the oar. On the south wall three ages of man are repre- 

ECHINODERMS AND ANEMONES. 
