14 Mr. Thompson on Fishes new to Ireland. six true feet, being unguiculated. Here, however, as in Cher-sis, the labial palpi have no ungues at their extremity. More-over, these labial palpi have only six joints ; differing from those of spiders in general, which have seven. I have named the species after my old and very distin-guished friend Baron Walckenaer, to whom we owe so much of our knowledge of Arachnida*. Otiothops Walckenaeri is found under stones in the woods of Cuba. My sketch is from the life. Plate II. Fig. 5. Otiothops Walckenaeri, magnified. /3, disposition of eyes j B, sternum ; c, first joints of coxre ; s, first joint of labial palpi ; £, labial palpi; &, mentum; y, maxilla; \ maxillary palpus; *, base of antenna; a, abdomen ; a, fusi. II. — On Fishes new to Ireland. By William Thompson, Esq., Vice-President of the Natural History Society of Belfast. [Continued from Vol. I. p. 359.] Motella glauca, Jenyns, Mackerel Midge. — Two mi-nute specimens — the larger lj inch long — of Motella that I have closely examined, and which were obtained at the South islands of Arran (off county Clare), by R. Ball, Esq., in June 1835, agree in every respect with the Ciliat a glauca of Couch, described in the Magazine of Natural History, vol. v. p. 16 ; at the same time I cannot perceive any specific difference be-tween them and M. Mustela, Phycis furcatus, Flem., Common Fork-beard. — To Cortland G. M. Skinner, Esq., of Glynn Park, Carrickfergus, I am indebted for a remarkably fine specimen of this fish, which was kindly secured for me on its being stated by the fishermen who captured it to be a species quite unknown to them. It was taken on February 24, 1836 (a calm day), with a gaff or hook, as it " lay floundering 55 on the surface of the water ; was very violent when brought on board, and before dying had struggled so hard as to divest itself of nearly all its scales. * I wish, however, that in his excellent volume on Apterous insects in the 1 Suites de Buffon ' he had not been so fon<J of changing names. Surely Walckenaer can afford to despise the petty credit of assigning a generic name.
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