Quart. Journ. Micr. Sci. xlii. 1899, p. 341.
"Gymnoblastic Hydroids," Ray Society, 1871, p. 359.
Hincks, British Hydroid Zoophytes, 1868, p. 74.
Ann. Mag. Nat. Hist. (6) x. 1892, p. 207.
Fewkes, Bull. Mus. Comp. Zool. xiii. 1887, p. 224.
Quart. Journ. Micr. Sci. xlii. 1899, p. 341.
"Gymnoblastic Hydroids," Ray Society, 1871, p. 359.
Hincks, British Hydroid Zoophytes, 1868, p. 74.
Ann. Mag. Nat. Hist. (6) x. 1892, p. 207.
Fewkes, Bull. Mus. Comp. Zool. xiii. 1887, p. 224.