Volume 1

Descriptive catalogue of the preparations in the museum of St. Thomas's Hospital.

Date:
1847-59
Catalogue details

Licence: Public Domain Mark

Credit: Descriptive catalogue of the preparations in the museum of St. Thomas's Hospital. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    435. Sections of Pandora rostrata, showing the nacrous lining and the layer of prismatic cellnlar structure on its exterior. 436. Section of Anatina olen, showing the nacrous internal layer with portions of the cellular external layer. 437. Sections of Thracia convexa parallel to the surface, showing the cellular exterior layer. 438. Section of Thracia convexa parallel to the surface, traversing both the outer and inner layers ; the outer layer resembling that of the last section ; the inner one is composed of smaller cells, each containing one or more dark spots. 439. Sections of Myodora striata parallel to the surface of the internal nacrous layer, and also of the outer indefinitely cellular layer. 440. Section of Mya arenaria parallel to the surface, showing in some parts indistinct indications of a cellular structure. 441. Section of Mya arenaria, showing the same appearances as in the preceding specimen. These, in respect to their structure, appear to be the link between the shells having a distinct cellular structure, and those in which their substance is homo- geneous. [Nos. 435, 436, 437, 438, 439, 440, and 441, are shells belonging to the natural family Myidae, in which the mem- branous element of the shell, after its decalcification by muri- atic acid, does not present a decidedly cellular structure.] 442. Epidermic layer of Mytilus edulis ; the outer surface showing a structureless epidermis with a layer of cells immediately beneath it. In the tliick parts of this section the cells present a black appearance. 443. Section of Terebratula inconstans parallel to the surface. Fossil, plicated, not perforated.
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