[300]

Quart. Journ. Micr. Sci. xlii. 1899, p. 341.

[301]

"Gymnoblastic Hydroids," Ray Society, 1871, p. 359.

[302]

Hincks, British Hydroid Zoophytes, 1868, p. 74.

[303]

Ann. Mag. Nat. Hist. (6) x. 1892, p. 207.

[304]

Fewkes, Bull. Mus. Comp. Zool. xiii. 1887, p. 224.