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. XXIV.] . i. Sertularella saccata Nutting. Part of colony, showing hydrothecae and gonangia with acrocysts (enlarged). 2. Three hydrothecae (still more enlarged). 3. Single hydrotheca, showing operculum (drawn to same scale as fig. 2). 4. Thuiaria fabricii (Levinsen). Part of branch showing hydrothecae and gonangia (enlarged). 5. Front view of part of branch (enlarged). [212] (230)
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