Interlaminate Figures of Sessile Barnacle Shells

Read, Richard

doi:10.1038/185778a0

Cited by 3 publications

(2 citation statements)

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“…Some of the important publications describing the shell structure in acorn barnacles are by Cornwall (1956,1958,1959,1960), Costlow (1956), Read (1960), Stubbings (1967), Ross (1970Ross ( , 1971), Newman and Ross (1971), Bourget and Crisp (1975), Klepal and Barnes (1975) and Otway and Anderson (t985). Udhayakumar and Karande (1986) have reported adhesive strengths of balanid and chthamalid barnacles.…”

Section: Introductionmentioning

confidence: 99%

Shell structure and shell strength in Cirripedes

Karande

Udhayakumar

1989

Proc. Indian Acad. Sci. (Anim. Sci.)

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Compressive and adhesive strengths of 7 barnacles endemic to BOMbay shore were ascertained by using Instron universal testing machine. The adhesive strengths of balanid species settled on man-made materials like bakelite, asbestos, perspex, rubber. glass and teflon were determined. The adhesion on teflon was found to be the poorest. Comments are made on the compressive strengths of barnacles and their shell macrostructures. A need for the adoption of uniform method of the preparation of shell samples as well as of instrumental technique has been suggested for computing fresh data for the representative species.

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Section: Introductionmentioning

confidence: 99%

Shell structure and shell strength in Cirripedes

Karande

Udhayakumar

1989

Proc. Indian Acad. Sci. (Anim. Sci.)

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“…The mouth-parts and various appendages as they were dissected away were mounted in order on a glass slide in poly vinyl lactophenol with lignin pink. Studies of the internal structure of the shell were made from as similar a specimen as possible to the lectotype, the method used being essentially that described by Read (Read, 1960), though sheets of " wet or dry " carborundum paper were used for the grinding and ordinary metal polish for the polishing.…”

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Darwin's type specimens and varieties of Balanus amphitrite

Harding¹

1962

Bulletin of the British Museum (Natural History).

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DARWIN (1854), P-I 97> an d again on p. 242 vividly describes the great variability of Balanus amphitrite and B. tintinnabulum and the difficulty he had in coming to the decision as to whether the various varieties he established for these two species should be regarded as varieties or as separate species. Balanus amphitrite like B.tintinnabulum is frequently found attached to ships and much of the extreme tendency to vary may well, as Darwin himself suggested, be due to their frequently being transported to new localities. Since Darwin's time, many workers have been faced with the same problem and are hampered by the fact that Darwin was unable to publish many illustrations and that his descriptions of the animal parts of the varieties are inadequate by present standards more than a century later. It is now forty-five years since Pilsbry (1916, pp. 93-94) wrote, " The definition of the sub-species of Balanus amphitrite is a very intricate problem . . . first of all the Darwin collection must be restudied and type localities for his varieties selected".The purpose of this paper is to publish the results of such a study. Much of the material studied by Darwin no longer exists ; but there is a cabinet of dry shells mounted on slabs in the British Museum. In the account which follows these specimens are referred to the slab to which they were attached, e.g. Slab 17 . 1 . 22.There are also a number of microscopic slides of mouth-parts and other appendages dissected by Darwin now in the University Museum of Zoology, Cambridge ; these

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