The Linnaean system of conchology ... / By John Mawe.

  • Mawe, John, 1764-1829.
Date:
1823
Catalogue details

Licence: Public Domain Mark

Credit: The Linnaean system of conchology ... / By John Mawe. Source: Wellcome Collection.

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    head of the animal, resembling- the Pholas; it also has two smaller valves of an ovate form, at the other extremi¬ ty. The destructive effects of this little animal would frequently occasion the loss of the largest vessels, were it not from the singular fact of their generally perforat¬ ing the wood in the direction of the grain. The T. utriculus is also cylindrical, undulated, and solid; it is usually about seven inches in length, and found in wood that has lain some time under water. It is white, subpellucid, very much bent, and gradually tapering; the aperture is ovate, divided in the middle by a partition. The last species is the T. clava, which is found in the seminal vessels of the Xylocarpus Granatum; one end is clavate,the other incurved, narrower, obtuse, and perforated in the middle: the shell is generally flex- uous, and has a brownish color; the exterior is rough, but within it is perfectly smooth. It is nearly two inches long, and about half an inch in diameter. The generic name Ttp^Suiv (Teredo) is derived from T£ptw, to bore. Scientific Name. Locality. Common. Name. Gigantea. Sumatra, Ceram . Gigantic Teredo Navalis. Sides & bottoms of Ships Ship.do • • Utriculus. Wood in the Sea . Timber ••• do Clava .. Coromandel .. Club-shap'ddo • •