216 
PACIFIC SCIENCE, Vol. XIX, April 1965 
Ventral (Kolliker, 1870-1872) — end of direc- 
tive plane on which single siphonoglyph of 
pennatulids is placed (by convention). 
Ventral ( Beneden, 1897 : 12 ) — aboral portion 
of column of Ceriantharia (by analogy with 
the orientation of Amphioxus) . 
Ventral (Haacke, 1879:294; Carlgren, 1893: 
242-246; 1912^:54-58) — end of directive 
plane opposite single siphonoglyph of Ceri- 
antharia if siphonoglyph is not considered 
homologous to that of the pennatulids. 
Ventral (Hertwig and Hertwig, 1879:572; Fau- 
rot, 1895:62, 228, 250; McMurrich, 1910:9; 
Torelli, 1960:383) — end of directive plane 
on which single siphonoglyph of the Ceri- 
antharia is placed if it is considered homolo- 
gous to siphonoglyph of pennatulids. 
ACKNOWLEDGMENTS 
I would like to acknowledge the guidance of 
Dr. B. C. Abbott throughout this work. Collec- 
tion and preliminary identification were made 
at the Department of Zoology, University of 
California, Los Angeles. The taxonomy and 
histology were completed at the Department 
of Zoology, University of British Columbia. 
I am most grateful for the facilities and aid 
given me at the University of British Columbia, 
especially by Dr. W. Hoar and Dr. N. Band. 
The technical assistance of Mrs. J. Eales and 
Mrs. J. McDonald is appreciated. I am in- 
debted to Dr. C. Hand for reading the manu- 
script. 
Most of the animals used were collected 
under a University of California, Los Angeles, 
Patent Fund Grant to the author. Necessary 
supplies and equipment were purchased under 
a United States Public Health Service Grant 
No. H-4019 to Dr. B. C. Abbott and a Sigma 
Xi Grant-in-aid to the author. 
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