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XX.—On Hæmonais laurentii, n. sp., a Representative of a little-known Genus of Naididæ.

Published online by Cambridge University Press:  06 July 2012

J. Stephenson
J. Stephenson
Affiliation:
Professor of Zoology, Government College, Lahore.
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Extract

In the year 1900 Bretscher (1) published a short account of a new aquatic Oligochæte belonging to the family Naididæ, which was assigned by him to a new genus, Hæmonais, under the name H. waldvogeli. Its chief peculiarity lay in the complicated blood-vascular system, to an account of which Bretscher devotes about half of his description. No further account of any representative of the genus has since appeared.

Some months ago I was surprised to find, in Lahore, specimens which were certainly referable to the same genus as the Swiss worms, though manifesting a few differences, sufficient to distinguish them as a separate species. Since my first discovery of the present form I have had the advantage, which did not fall to Bretscher's lot, of being able to observe sexual individuals; and as the worms are remarkable in other respects than that of the vascular system, and since moreover the somewhat curt description which he gives is perhaps scarcely sufficient to satisfy legitimate curiosity in regard to a new genus, I give below a fairly complete account of the Lahore specimens.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 50 , Issue 4 , 1916 , pp. 769 - 781
Copyright
Copyright © Royal Society of Edinburgh 1916

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References

References to Literature

(1)Bretscher, K., “Mitteilungen über die Oligochaetenfauna der Schweiz,” Rev. Suisse de Zool., t. viii, 1900.Google Scholar
(2)Michaelsen, W., “Über einige zentralamerikanisch Oligochäten,” Arch. f. Naturgesch., 78. Jahrg., Abt. A, 1912.Google Scholar
(3)Stephenson, J., “Studies on the Aquatic Oligochæta of the Punjab. III: On a species of Dero found in Lahore; a contribution to the Dero question,” Records Ind. Museum, vol. v, 1910.Google Scholar
(4)Stephenson, J., “On a new species of Branchiodrilus and certain other aquatic Oligochæta, with remarks on cephalisation in the Naididæ,” Records Ind. Museum, vol. vii, 1912.Google Scholar
(5)Stephenson, J., “On Branchiura Sowerbyi Beddard, and on a new species of Limnodrilus with distinctive characters,” Trans. Roy. Soc. Edin., vol. xlviii, pt. ii, 1912.Google Scholar