[320]

Cf. Schepotieff, Neues Jahrb. f. Mineralogie, 1905, ii. pp. 79-98.

[321]

S. J. Hickson and H. England, Siboga Exped. viii. 1904, p. 26.

[322]

"Life-History of the Hydromedusae," Mem. Boston Soc. iii. 1885, p. 359.

[323]

Journ. Morph. xi. 1895, p. 493.

[324]

H. F. Perkins, Proc. Acad. Nat. Sci. Phil. Nov. 1902, p. 773.