348 
PACIFIC SCIENCE, VoL IX, July, 1955 
holoplanktonic organism which undergoes 
diurnal vertical migrations. 
ACKNOWLEDGMENTS 
During the course of my work on Tetra- 
platia I have been materially aided by a num- 
ber of people who have either collected 
specimens for me or called my attention to 
their presence in individual plankton samples. 
These people are Messrs. Berner, Bieri, Brin- 
ton and McGowan of the Scripps Institution 
of Oceanography, and Mr. Barham of the 
Hopkins Marine Station. I also wish to thank 
Dr. M. W. Johnson of Scripps, and Mr. G. F. 
Gwilliam of the University of California at 
Berkeley for a critical reading of the manu- 
script. 
REFERENCES 
Broch, H. 1929. Trachylinen (Trachymedu- 
sen und Narcomedusen). Nord. Plankton 
6: 481-540. 
Busch, W. 1851. Beobachtungen uber Anatomie 
und Entwicklung einiger wirbellosen Seethiere. 
143 pp. August Hirschwald, Berlin. 
Carlgren, O. 1909. Die Tetraplatien. Wiss. 
Ergeb. der Deut. Tiefsee—Exped. 19 (3) : 77- 
122, pis. 
Claus, C. 1878. Ueber Tetrapteron (Tetra- 
platia) volitans. Arch. f. Mikros. Anat. 15: 
349-359, 1 pi. 
Dantan, J. L. 1925. Contribution a 1’Etude 
du Tetraplatia volitans. L'Institut Oceanog ., 
Ann. (n.s.), 2: 429-459, 12 text figs., 2 pis. 
1927. Tetraplatia volitans (Busch, 
1851). Faune et flore de la Mediterrannee. 
lal, [1-pp.], 2 figs. Institut Oceanograph- 
ique, Paris. 
Fewkes, W. J. 1883. The affinities of Tetra- 
ptera volitans. Amer. Nat. 17: 426. 
Hand, C. 1954. Three Pacific species of "Lar” 
(including a new species) their hosts, 
medusae and relationships (Coelenterata, 
Hydrozoa). Pacific Sci. 8 (1): 51-67, 7 figs. 
Haeckel, E. 1879- Das System der Medusen. 
672 pp., Gustav Fischer, Jena. 
Hyman, L. 1940. The invertebrates , Protozoa 
through Ctenophora. xii + 726 pp., 221 figs. 
McGraw-Hill Book Company, Inc., New 
York. 
Komai, T. 1939. On the enigmatic coelen- 
terate Tetraplatia. Jap. Jour. Zool. 8: 231- 
250, 11 figs., 1 pi. 
Krohn, A. 1853. Ueber die Entwickelung 
der Seesterne und Holothurien. Arch. f. 
Anat. u. Physiol. 1853: 317. 
— 1865. Ueber Tetraplatia volitans. Arch, 
f. Naturgesch. 1: 337-341. 
Krumbach, T. 1924. Scyphozoa. In Hand- 
buch der Zoologie Vol. 1, 1060 pp., Walter 
De Gruyter and Co., Berlin. 
Leloup, E. 1935. Contribution a la repartition 
de Tetraplatia volitans (Busch) . Brussels Mus. 
Roy. d'Hist. Nat., Bui. 11 (4): 1-7. 
Leuckart, R. 1866. Bericht fiber die Wissen- 
schaftlichen Leistungen in der Naturge- 
schichte der Niederen Tiere wahrend d. 
Jahre 1864 u. 1865. Arch. f. Naturgesch. 2: 
99 - 100 . 
Mayer, A. G. 1910. The hydromedusae. In 
medusae of the world. Vol. 1, 230 pp. Car- 
negie Institution, Washington. [Pub. 109 
of the Carnegie Institution.] 
Papenfuss, E. 1936. The utility of nemato- 
cysts in the classification of certain Scypho- 
medusae. I. Lunds Univ. Arrskr ., N. F., Avd. 
2, 31 (11): 1-26. 
Rose, M. 1926. Le plankton de la baie d’Alger 
pendant le mois de janvier. Soc. d'Hist. Nat. 
de PAfrique du Nord, Bui. 26: 57-62. 
Russell, F. S. 1938. On the nematocysts of 
hydromedusae. Mar. Biol. Assoc., U. K., 
Jour. 23: 145-165. 
Viguier, C. 1885. Sur le Tetraptere (Tetra- 
platia volitans) Busch. [Paris] Acad, des 
Sci., Compt. Rend. 100: 388-390. 
1890. Etudes sur les animaux in- 
ferieurs de la baie d’Alger. Le Tetraptere 
(Tetraplatia volitans Busch). Arch, de Zool. 
Expt. et Gen. II, 8: 101-142, 2 pis. 
Weill, R. 1934. Contribution a l’etude des 
Cnidaires et de leur nematocystes. Wimer- 
eux, Sta. Zool., Trav., 10: 1-347; 11: 
348-701. 
