Land and fresh water mollusks / by William H. Dall. Hydroids / C.C. Nutting.

  • William Healey Dall
Date:
[1910]
Catalogue details

Licence: In copyright

Credit: Land and fresh water mollusks / by William H. Dall. Hydroids / C.C. Nutting. Source: Wellcome Collection.

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    [Proc. Wash. Acad. Sci., Vol. Ill, PI.XIX.] Fig. i. Campanularia regia Nutting. Single hydrotheca, showing hydranth (much less enlarged than the other figures). 2. Another hydrotheca, showing reduplication of margin. 3. Hydrotheca of C. speciosa Clark (drawn to the same scale as fig. 1, to show comparative size). 4. Obelia borealis Nutting. Part of colony, showing hydrothecae and gonangium (enlarged). 5 and 6. Gonangia (greatly enlarged). [202] (220)
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