593.7
May
M
 Mayer, Alfred Goldsborough, 1868-1922 
   Medusae of the world.   Washington, Carnegie Institution of Washington, 1910
   3 t. ilus., láms. color., tablas. 30 cm. (Carnegie Institution of Washington. Publication no. 109) 

  Contiene: t. 1-2. The hydromedusae.-t.3. The scyphomedusae