UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 6, No. 4, pp. 65-1 14, Pis. 7-14 November 15, 1909 



CONTRIBUTIONS FROM THE LABORATORY 



OF THE 



MARINE BIOLOGICAL ASSOCIATION OF SAN DIEGO 



XXVI 



HALOCYNTHJA JOHNSONI N. SP. 



A COMPREHENSIVE INQUIRY AS TO THE EXTENT 



OF LAW AND ORDER THAT PREVAILS IN 



A SINGLE ANIMAL SPECIES 



WM. E. RITTER 



BERKELEY 



THE UNIVERSITY PRESS 



