Miscellaneous. 221 importance, which indeed M^ill form a continuation or supplement nearly allied to that of Schimper. It is in the full expectation of a part of Kotschy's collections being received at Esslingen from this traveller in the course of the present year that the directors of the Society feel themselves warranted in requesting new members to subscribe for shares from so low as 30 to 60 florins (3/. 3^. to 6/. Qs. sterling) or upwards, according to the portion they may wish to se-cure. The subscription price is fixed at the same as Schimper's was, viz. 15 florins (U. 11^. Qd. sterling) per 100 species. Third, Welwitsch, who has been despatched to the Azores and Cape de Verde islands, and whose collections (including the plants he gathered during his detainment at Lisbon, and which are themselves far from inconsiderable) are shortly expected to arrive. A single share for this expedition is stated at 24 florins. *^* The Society still have at disposal to Non subscribers a few collections from the former expeditions, viz. Georgio-Caucasian, North American, and Egyptio-Arabian, at from 15 to 25 florins per century. 9, Queen-street, Soho-sqiiare. London, May 1st, 1840. NOTE ON ARGULUS FOLIACEUS, JURINE. BY WM. THOMPSON, VICE-PRES. NAT. HIST. SOC. OF BELFAST. Belfast, Oct. 29, 1838. — In our market today I had the pleasure of detecting one of these very interesting and handsome parasites at-tached to the dorsal fin of a Salmo Trutta, about a foot in length. The Argulvs is 3^ lines long, is a female, and in addition to the ova exhibits at the base of the tail the dark green spots (" noirs," Desm. Consid. Gen. Crust., p. 332), which are considered to mark this sex. Although the fish to which it was attached had been for some hours out of the water, the Argulus held so firmly by its two disks that I had some difficulty in detaching it without in-jury. For about ten minutes it was wrapped in a piece of dry paper, and then placed in a vessel of water in which salt had been dis-solved until it was to the taste like strong sea-water*. This was no sooner done, than my pretty captive, after drawing her last pair of feet together several times f, thus calling to mind the common house * This was done in consequence of my having been told that tlie fish was taken in the sea; the stomach, however, contained the remains of fresh~ water insects (according to my friend A. H. Haliday, Esq., to whose in-spection they were submitted), which possibly might have been washed into the sea and there obtained, but this is by no means probable. t I observed this repeatedly done afterwards — they seem to be rubbed against the caudal plates. .