62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I49 



Lewis, J. B. 



1958. The biology of the tropical sea urchin Tripneustes esculentas Leske 

 in Barbados, British West Indies: Canadian Journ. Zoology, vol. 

 36, No. 4, p. 607-621, pis. 8-9, 7 text figs. 

 Moore, D. R. 



1956. Observations of predation on echinoderms by three species of Cas- 

 sididae : The Nautilus, vol. 69, No. 3, p. 73-76. 

 Moore, H. B., Jutare, Thelma, Bauer, J. C, and Jones, J. A. 



1963. The biology of Lytechinus variegatus: Bull, of Marine Sci. of the 



Gulf of Mex., vol. 13, No. 1, p. 23-53, 22 text figs. 



MORTENSEN, Th. 



1928-1951. A monograph of the Echinoidea : 5 vols, and index, Copenhagen, 

 C. A. Reitzel publisher. 

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1964. Echinoderms : experimental and ecological : Oceanography and Mar. 



Biol. Ann. Rev., vol. 2, p. 393-423, 6 text figs. 

 Parker, G. H. 



1936. Direction and means of locomotion in the regular sea urchin Ly- 

 techinus: Mem. Mus. Hist, nat., Belg., (2) vol. 3, p. 197-208, 6 

 text figs. 

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1962. Studies on factors affecting the local distribution of two sea urchins, 

 Arbacia punclulata and Lytechinus variegatus: Ecology, vol. 43, 

 No. 2, p. 309-313, 2 text figs. 

 Siiroeder, R. E., and Stark, W. A., II. 



1964. Photographing the night creatures of Alligator Reef: Natl. Geog. 

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Manuscript received for publication February 19, 1965 



