File:EB1911 Lamellibranchia - Anodonta cygnea.jpg
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Summary
| Description |
English: Diagrams of the external form and anatomy of Anodonta cygnea, the Pond-Mussel; in figures 1, 3, 4, 5, 6 the animal is seen from the left side, the centro-dorsal region uppermost. (1) Animal removed from its shell, a probe g passed into the sub-pallial chamber through the excurrent siphonal notch. (2) View from the ventral surface of an Anodon with its foot expanded and issuing from between the gaping shells. (3) The left mantle-flap reflected upwards so as to expose the sides of the body. (4) Diagrammatic section of Anodon to show the course of the alimentary canal. (5) The two gill-plates of the left side reflected upwards so as to expose the fissure between foot and gill where the probe g passes. (6) Diagram to show the positions of the nerve-ganglia, heart and nephridia. See legend below. |
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| Date | published 1911 | |||
| Source | “Lamellibranchia,” Encyclopædia Britannica (11th ed.), v. 16, 1911, p. 113, fig. 1. | |||
| Author | Edwin Ray Lankester; Joseph Thomas Cunningham | |||
| Permission (Reusing this file) |
|
English: Legend:
| a, | Centro-dorsal area. |
| b, | Margin of the left mantle-flap. |
| c, | Margin of the right mantle-flap. |
| d, | Excurrent siphonal notch of the mantle margin. |
| e, | Incurrent siphonal notch of the mantle margin. |
| f, | Foot. |
| g, | Probe passed into the superior division of the sub-pallial chamber through the excurrent siphonal notch, and issuing by the side of the foot into the inferior division of the sub-pallial chamber. |
| h, | Anterior (pallial) adductor muscle of the shells. |
| i, | Anterior retractor muscle of the foot. |
| k, | Protractor muscle of the foot. |
| l, | Posterior (pedal) adductor muscle of the shells. |
| m, | Posterior retractor muscle of the foot. |
| n, | Anterior labial tentacle. |
| o, | Posterior labial tentacle. |
| p, | Base-line of origin of the reflected mantle-flap from the side of the body. |
| q, | Left external gill-plate. |
| r, | Left internal gill-plate. |
| rr, | Internal lamella of the right inner gill-plate. |
| rg, | Right outer gill-plate. |
| s, | Line of concrescence of the outer lamella of the left outer gill-plate with the left mantle-flap. |
| t, | Pallial tentacles. |
| u, | The thickened muscular pallial margin which adheres to the shell and forms the pallial line of the left side. |
| v, | That of the right side. |
| w, | The mouth. |
| x, | Aperture of the left organ of Bojanus (nephridium) exposed by cutting the attachment of the inner lamella of the inner gill-plate. |
| y, | Aperture of the genital duct. |
| z, | Fissure between the free edge of the inner lamella of the inner gill-plate and the side of the foot, through which the probe g passes into the upper division of the sub-pallial space. |
| aa, | Line of concrescence of the inner lamella of the right inner gill-plate with the inner lamella of the left inner gill-plate. |
| ab, ac, ad, | Three pit-like depressions in the median line of the foot supposed by some writers to be pores admitting water into the vascular system. |
| ae, | Left shell valve. |
| af, | Space occupied by liver. |
| ag, | Space occupied by gonad. |
| ah, | Muscular substance of the foot. |
| ai, | Duct of the liver on the wall of the stomach. |
| ak, | Stomach. |
| al, | Rectum traversing the ventricle of the heart. |
| am, | Pericardium. |
| an, | Glandular portion of the left nephridium. |
| ap, | Ventricle of the heart. |
| aq, | Aperture by which the left auricle joins the ventricle. |
| ar, | Non-glandular portion of the left nephridium. |
| as, | Anus. |
| at, | Pore leading from the pericardium into the glandular sac of the left nephridium. |
| au, | Pore leading from the glandular into the non-glandular portion of the left nephridium. |
| av, | Internal pore leading from the non-glandular portion of the left nephridium to the external pore x. |
| aw, | Left cerebro-pleuro-visceral ganglion. |
| ax, | Left pedal ganglion. |
| ay, | Left otocyst. |
| az, | Left olfactory ganglion (parieto-splanchnic). |
| bb, | Floor of the pericardium separating that space from the non-glandular portion of the nephridia. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:20, 2 April 2019 | | 741 × 832 (257 KB) | Bob Burkhardt | {{Information |description ={{en|1=Diagrams of the external form and anatomy of ''Anodonta cygnea'', the Pond-Mussel; in figures 1, 3, 4, 5, 6 the animal is seen from the left side, the centro-dorsal region uppermost. (1) Animal removed from its shell, a probe ''g'' passed into the sub-pallial chamber through the excurrent siphonal notch. (2) View from the ventral surface of an Anodon with its foot expanded and issuing from between the gaping shells. (3) The left mantle-flap reflected upwar... |
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