Hydrozoa source details
Hincks, Th., 1861. On Clavatella, a new genus of corynoid polypes, and its reproduction. Ann. Mag. nat. Hist. -37 : 73-81.
pls 7-8. - Summary under the title: On the development of the hydroid polypes, Clavatella and Stauridia, with remarks on the relation between the polypes and its medusoid, and between the polyp and the medusa. - Rep. Br. Ass. Advmt Sci., 31, (Manchester, 1861)(2): 145.