33 



REFERENCES. 



Grave, Caswell. 1920. Amaroucium pellucidum (Leidy) form constella- 



tum (Verrill). I. The activities and reactions of the tadpole larva. Journ. 



Exp. Zool., vol. 30, p. 239-257. 

 . 1921. Amaroucium constellatum (Verrill). II. The structure and 



organization of the tadpole larva. Journ. Morph., vol. 36, p. 71-101. 

 Leidy, J. 1855. Contributions towards a knowledge of the marine invertebrate 



fauna of the coasts of Rhode Island and New Jersey. Journ. Acad. Nat. 



Sci. Phila., ser. 2, vol. 3, p. 135-152, pi. 10-11. ''Alcyonidium pellucidum,'^ 



p. 142, pi. 10, fig. 24. 

 Sumner, F. B., Osburn, R. C, and Cole, L. J. 1913. A biological survey 



of the waters of Woods Hole and vicinity. Bull. U. S. Bureau of Fisheries, 



vol. 31, 860 pp. 

 Van Name, W. G. 1910. Compound ascidians of the coasts of New England 



and neighboring British Provinces. Proc. Boston Soc. Nat. Hist., vol. 34, 



p. 339-424, pi. 34-39. 

 Verrill, A. E. 1871. Brief contributions to zoology from the Museum of 



Yale College. No. XVI. On the distribution of marine animals on the 



southern coast of New England. Amer. Journ. Sci., ser. 3, vol. 2, p. 357-362. 



