File:EB1911 Lamellibranchia - ctenidia of Nucula.jpg
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[edit]DescriptionEB1911 Lamellibranchia - ctenidia of Nucula.jpg |
English: Structure of the ctenidia of Nucula. See legend below. |
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Date | published 1911 | ||||
Source | “Lamellibranchia,” Encyclopædia Britannica (11th ed.), v. 16, 1911, p. 116, fig. 10. | ||||
Author | After Mitsukuri. | ||||
Permission (Reusing this file) |
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English: Legend:
A. | Section across the axis of a ctenidium with a pair of plates—flattened and shortened filaments—attached. |
i, j, k, g, | Are placed on or near the membrane which attaches the axis of the ctenidium to the side of the body. |
a, b, | Free extremities of the plates (filaments). |
d, | Mid-line of the inferior border. |
e, | Surface of the plate. |
t, | Its upper border. |
h, | Chitinous lining of the plate. |
r, | Dilated blood-space. |
u, | Fibrous tract. |
o, | Upper blood-vessel of the axis. |
n, | Lower blood-vessel of the axis. |
s, | Chitinous framework of the axis. |
cp, | Canal in the same. |
A, B, | Line along which the cross-section C of the plate is taken. |
B. | Animal of a male Nucula proxima, Say, as seen when the left valve of the shell and the left half of the mantle-skirt are removed. |
a, a, | Anterior adductor muscle. |
p.a, | Posterior adductor muscle. |
v.m, | Visceral mass. |
f, | Foot. |
g, | Gill. |
l, | Labial Tentacle. |
l.a, | Filamentous appendage of the labial tentacle. |
lb, | Hood-like appendage of the labial tentacle. |
m, | Membrane suspending the gill and attached to the body along the line x, y, z, w. |
p, | Posterior end of the gill (ctenidium). |
C. | Section across one of the gill-plates (A, B, in A) comparable with fig. 11 C. |
i.a, | Outer border. |
d.a, | Axial border. |
l.f, | Latero-frontal epithelium. |
e, | Epithelium of general surface. |
r, | Dilated blood-space. |
h, | Chitinous lining (compare A). |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:26, 8 April 2019 | 747 × 1,116 (311 KB) | Bob Burkhardt (talk | contribs) | {{Information |description ={{en|1=Structure of the ctenidia of ''Nucula''.}} |date =published 1911 |source =“Lamellibranchia,” ''Encyclopædia Britannica'' (11th ed.), v. 16, 1911, p. 116, fig. 10. |author =After Mitsukuri. |permission ={{PD-Britannica}} }} Category:Nucula Category:Mollusca anatomy |
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