Parasitic Crustaceans Research Articles

XIV.—Memoir on a new parasitic Crustacean belonging to the order Larnæida, forming a new family

XIV.—Memoir on a new parasitic Crustacean belonging to the order Larnæida, forming a new family

4. On the Structure of Chondracanthus Lophii; with Observations on its Larval Form

The authors, after a brief historical introduction, proceeded to give a detailed account of the anatomy of this parasitic crustacean, the description comprising that of the female and male, and, so far as they had been enabled to trace it, of the larva also.

VIII.—On the Structure of Lerneopoda Dalmanni, with Observations on its Larval Form.

The first example of this, apparently little known, species of Parasitic Crustacean appears to have been noted by Professor Otto. The celebrated Swedish naturalist Retzius was, however, the first to give, in 1829, an anatomical description of it. He named it Lernœa Dalmanni. His description was accompanied by several figures, which, though in many respects imperfect, enable one to recognise the chief external characters of the animal. He found three specimens at Christian Sound, in the nasal cavity of Raia Batis. Von Nordmann obtained from Rudolphi the specimen discovered by Otto, but it was so injured, that he adopted, in his account of the anatomy of the animal, the description of Retzius. Some years afterwards, in 1836, Kröyer added it to the Danish fauna. He states that he obtained two specimens from the nasal chamber of a skate brought to him by a fisherman from Aal-back, and that specimens from Iceland had been for several years in the possession of the Natural History Society. As naturalists had now begun to subdivide the old Linnean genus Lernæa into various genera, Kröyer added this animal to the genus Lerneopoda of De Blainville, and, continuing its specific name, termed it Lerneopoda Dalmanni.

1. On the Structure of Lerneopoda Dalmanni, with Observations on its Larval Form

This apparently little known form of parasitic crustacean has been as yet described only by Retzius and Kröyer. It does not appear, up to this time, to have been recognised as a British species. During the present year, many specimens obtained from the nasal cavity of more than one Rasa batis, caught by the Newhaven fishermen, have been examined by the authors.

VII.—On the Structure of the Chondracanthus Lophii, with Observations on its Larval Form.

The very curious Parasitic Crustacean, the structure and larval form of which we propose to consider in the following communication, we obtained in the month of August last, in considerable numbers, in the branchial pouches of a Lophius piscatorius, which we captured at Whitby in Yorkshire.