60 Mr. J. Y. Johnson on new The female is largei-and apparently more robust than the male, as is the case with some other species of Notonecta. Massachusetts and Florida: coll. Uhler. Massachusetts: British Museum. Massachusetts: Montandon's coll. I liave great pleasure in dedicating this handsome and remarkable species to the illustrious American Rhynchotist, to whose labours for the past forty years we are indebted in such large measure for our knowledge of, amongst other things, the North-American aquatic Rhynchota. N. Uhleri is at once distinguished by the very peculiar form of the head and eyes, as above described ; it is doubtless not uncommon over a large area of the United States. N.B. — In connexion with the above descriptions it may be as well to remark that, contrary, perhaps, to the usage of some entomologists, I have used the word " transverse " in the sense of being wider than Jong : some rhyncliotists, also, appear to use the word " vertex " as the equivalent of the whole dorsal surface of the head (excluding the eyes) ; I have restricted the term to the apparent (as seen from above) apical margin of the head\ the head, moreover, will be found to be narrowest in most JSotonectce not at the base, but a trifle above it, between the postero-interior ocular angles in fact. Summary. Diaprepocoris, gen. nov. D. ba}-ycepJ>ala, sp. n. Australia. Corixa eim/nome^ sp. n. Australia. australis, Fieb. Additional description. • suhjucens, Waliier. ] lacustris, Stepliens. ( -n i i,i nvreo • ,. c,, 1^ > Probably Mbb. names. rivaiis, Stephens. I *' Nepn minor, Walker. ) Corixa caleihnica, noni. nov. for C. cognata, D. & S. (preoccupied). Notonecta Montandoni, sp. n. China. lactitans, sp. n. West Central Africa. Uhleri, sp. n. North America. VII. — New Cyclostomatous Bryozoa found at Madeira. By James Yate Johnson, Corr.M.Z.S. Tubuliporidse. Alecto simplex J J. Y. Johnson. A very slender adnate thread, from the upperside of which rise the erect elongate cells in a single series. The adnate
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