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The individual most frequently seen in these excursions in Ceylon is a perch called by the Singhalese Kavaya or Kawhy-ya, and by the Tamils Pannei-eri, or Sennal. It is closely allied to the Anabas scandens of Cuvier, the Perca scandens of Daldorf. It grows to about six inches in length, the head round and covered with scales, and the edges of the gill-covers strongly denticulated.
The fish which the moodliar sent to me is an Anabas, closely resembling the Perca scandens of Daldorf; but on minute examination it proves to be a species unknown in India, and hitherto found only in Boreno and China. It is the A. oligolepis of Bleek.
It is remarkable, however, that this discovery of Daldorf, which excited so great an interest in 1791, had been anticipated by an Arabian voyager a thousand years before.
DALDORF, who was a lieutenant in the Danish East India Company's service, communicated to Sir Joseph Banks, that in the year 1791 he had taken this fish from a moist cavity in the stem of a Palmyra palm, that grew near a lake.
The position of its fins, and the spines on its gill-covers, might assist its journey upwards, but the same apparatus would prove anything but a facility in steadying its journey down. The probability is, as suggested by Buchanan, that the ascent which was witnessed by Daldorf was accidental, and ought not to be regarded as the habit of the animal.
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