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. XXIII.] Fig. i. Halecium reversum Nutting. Part of colony, showing internodes and hydrophores (enlarged). 2. Single hydranth with hydrophore (enlarged). 3. Halecium robustum Nutting. Tip of branch, showing expanded hy- dranths (enlarged). 4. Part of branch with soft parts removed to show the hydrophores (en- larged). 5. Single hydranth with its hydrophore (greatly enlarged). [210] (228)
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