Abstract
WHILE examining living specimens of Malacobdella grossa, Müll., under a binocular dissecting microscope (the specimen being extended under a glass slide in sea-water in the usual manner), I noticed a pair of minute structures on the head, which, so far as I can trace, do not correspond to anything previously described in this species. Fig. 1, drawn from a living specimen, shows these organs anterior to the cerebral ganglia, which send a small nerve in their direction. They have the appearance of small pits on the dorsal surface, suggestive of sense-organs. They are unpigmented.
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References
Riepen, Z. Wiss. Zool., 143; 1933.
Burger, “Fauna und Flora des Golfes von Neapel”, No. 22 1895.
Gering, Z. Wiss. Zool., 97; 1911.
Blanchard, Ann. Sci. Natur. (Series 3), Paris; 1845.
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JACKSON, L. Sense-Organs in Malacobdella. Nature 135, 792 (1935). https://doi.org/10.1038/135792a0
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DOI: https://doi.org/10.1038/135792a0
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