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XVII.—On the Homological Relations of the Cœlenterata
Published online by Cambridge University Press: 17 January 2013
Extract
Independently of the general agreement which necessitates the association of the Hydra, Actinia, and other Cœlenterate animals into one primary group of the animal kingdom, we must also expect a special morphological correspondence between the various forms of animals thus associated. In other words, a homological agreement ought to be determinable between the parts of animals included in any one subordinate section of the Cœlenterata with the parts of animals included in any other.
A comparison of the two primary sections of the Cœlenterata (Actinozoa and Hydrozoa), and of the various orders of these with one another, will show that such an agreement really exists, and that it is possible, by easily understood and thoroughly consistent modifications, to convert each special type into any of the others.
- Type
- Research Article
- Information
- Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 26 , Issue 2 , 1871 , pp. 459 - 466
- Copyright
- Copyright © Royal Society of Edinburgh 1871
References
page 459 note * Contr. Nat. Hist. U.S. vol. iv. p. 377.
page 460 note * Report on the Reproductive System of the Hydroida. Brit. Assoc. Report for 1863.
page 463 note * In the above comparison of the siphonophora with the hydroida, I have adopted for the siphonophora the terminology proposed by Huxley, whose views of the homological relations existing between the two orders I have also generally followed. See his “Oceanic Hydrozoa,” page 8, &c.
page 466 note * Proc. Roy. Soc. Edinb., 1862.