File:EB1911 Hydromedusae - structure of Velella.jpg
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Summary
| Description |
English: Diagram of the structure of Velella, showing the central and peripheral thirds of a half-section of the colony, the middle third being omitted. The ectoderm is indicated by close hatching, the endoderm by light hatching, the mesogloea by thick black lines, the horny skeleton of the pneumatophore and sail by dotting (see legend below). |
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| Date | published 1911 | |||
| Source | “Hydromedusae,” Encyclopædia Britannica (11th ed.), v. 14, 1911, p. 158, fig. 70. | |||
| Author | From G. H. Fowler, after A. Agassiz, Lankester’s Treatise on Zoology. | |||
| Permission (Reusing this file) |
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English: Legend:
| BL, | Blastostyle. |
| C, | Centradenia. |
| D, | Palpon. |
| EC, | Edge of colony prolonged beyond the pneumatophore. |
| G, | Cavity of the large central siphon. |
| M, | Medusoid gonophores. |
| PN, | Primary central chamber, and PN′, concentric chamber of the pneumatophore, showing an opening to the exterior and a “trachea.” |
| S, | Sail. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:50, 4 December 2018 | | 971 × 1,418 (238 KB) | Bob Burkhardt | {{Information |description ={{en|1=Diagram of the structure of ''Velella'', showing the central and peripheral thirds of a half-section of the colony, the middle third being omitted. The ectoderm is indicated by close hatching, the endoderm by light hatching, the mesogloea by thick black lines, the horny skeleton of the pneumatophore and sail by dotting (see legend below).}} |date =published 1911 |source =“Hydromedusae,” ''Encyclopædia Britannica'' (11th ed.), v. 14, 1911, p... |
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