72 



HA R D WI CA'E'S S CIENCE -GOS SIP. 



N. B. C. — i, Vsnea barhata; 2, Parmelia saxatilis ; 3 and 

 5, no apothecia ; 4, form of Parmelia saxatilis. The best 

 book on the subject is " The Lichen Flora of Great Britain." 



J. A. W. (Darlington). — No 4, Lecanora -vitellina ; No. 3, 

 Cladonia cervicornis ; No. 6, Cladonia fiyxidata ; we are 

 unable with certainty to name the others, they bear no fruit 

 (apothecia). We should recommend you Mudd's Lichens. 



T. W. O. (Aberdeen). — We think they are — 2, Cladonia 

 pyxidata ; 3, Stereocaitlott coralloidcs ; 4 and 7, Parmelia 

 saxatilis ; 6, Reindeer moss [C. rangiferinus). 



J. Atkinson. — We will try to answer your queries next 

 month. 



EXCHANGES. 



Wanted, Bell's " Quadrupeds," and Hewitson's " Oology," 

 for stuffed birds or cash. — E. £. Evans, Brimscombe, Gloucester. 



A quantity of foreign diatomaceous material, in exchange 

 for well-mounted slide of Uredo caries, Dec, Uredo ftrtida 

 (Bauer), Uredo segetum (or the flour acarus), or Trichina 

 spiralis (Fasciola licpatica], or Cysticcrcus cellnlosus mounted. 

 A. Smith, Chemical Laboratory, Essex Road, Islington. 



A rectangular tube and prism, with Beale's camera, for 

 drawing objects with the microscope in the erect position. Will 

 fit a microscope with tube of 1 inch diameter. Wanted, cabinet 

 for microscopic objects or cash. — Address, T. V. D., 33 Sloane 

 Street, London, S.W. 



Niagara River filterings, in exchange for other slides. Also 

 filterings unmounted. — Herman Poole, Practical School, Buffalo 

 N.Y., U.S.A. 



Duplicates of the following good British land and fresh- 

 water shells, offered in exchange for other desiderata — Lim. 

 Burnet ti, L. involnta, S. oblonga, Vertigo fiusilla, V. sn.b- 

 striata, I '. al/>t'slris, 1 '. minittissima, V. angnstior — deside- 

 rata, good foreign land shells, named, British birds' egg*:, or 

 several species of British land shells (locally common in many 

 places) in quantity. — W. Sutton, Upper Claremont, Newcastle- 

 on-Tyne. 



Offered in exchange for Hincks' Hydroida or microscopic 

 apparatus, 75 species of foreign ferns, some very rare. Particu- 

 lars on application. — E. C. J., Foley Cottage, Hampton Road, 

 Bristol. 



Wanted, "Midland Naturalist" complete, any vols.* of 

 Science-Gossip, except for 1877 and 1878, unbound preferred. 

 " Popular Science Review " for 1871, or any works on Bryology ; 

 exchange, Dawson's " Origin of the World," Watson's " Reason- 

 ing Power of Animals," Cook's " Biology," all new, or cash. — 

 J. R. Murdoch, 40 Leighton Lane, Leeds. 



Wanted, a Crouch, or Swift's student's microscope, cheap ; 

 state lowest cash price.— J. R. Murdoch, 40 Leighton Lane, 

 Leeds. 



A number of well-mounted microscopic slides for exchange. 

 Lists invited. — R. Hawkins, Hillside, Hastings. 



Cassell's " Races of Mankind," bound in 2 vols. Wanted in 

 exchange for the above, geological or zoological books or fossils. 

 — J. Arthur Floyd, Alcester, Warwickshire. 



Wanted, a well-mounted and perfect skeleton of the common 

 frog. — Fred. James, Tovil, Maidstone. 



Wanted, good specimens of the following British mosses, 

 any species of Leskea, except sericea ; also any of Gymno- 

 stomum with fruit. Exchange foreign or British fern roots or 

 fronds. — Miss Ridley, Hollington, Newbury. 



Wanted, catalogue, or parts 1 and 2 of "Marine Polyzoa," 

 Busk, 1852. Good exchange. — A. Palmer, Lyme Regis, Dorset. 



Scotch carboniferous fossils (good specimens), in exchange 

 for fragments of British or foreign sponges. Send lists of 

 sponge-; to J. Smith, 94 Dundas Street, Glasgow. 



Bkachiopoda from the Irish Cretaceous rocks, including 

 Waldheima Hibeniica, figured in Juke's " Manual of Geology," 

 Rhynckonella robusta (these two rare species are peculiar to 

 the Irish Cretaceous strata), Rh. dimidiata, var. convexa, Rh. 

 limbata, var. Icntiformis, Terebratula Hibernica, Ter. obesa 

 (very fine), several rare varieties of Ter. carnea, and many 

 other species, in exchange for brachiopods or sponges, from 

 the Cretaceous beds of England and the continent. Send lists 

 to Wm. Gault, 105 Westmoreland Street, Belfast. 



Wanted, a triple nose piece, in exchange for Dent's dip- 

 leidoscope with compass and level, new. — W. Eyre, Swarraton 

 Rectory, Alresford, Hants. 



Sections of the corals of Devon for the microscope. Also 

 various kindsof fossils, British shells and minerals, for large 

 kinds of foreign shells, and good large specimens of double- 

 reflecting span in cubes, or good specimens of Silurian fossils.— 

 A. J. R. Sclater, Bank Street. Teignmouth. 



Wanted, animal parasites in exchange for other good micro 

 objects.— Thomas dirties, 244 High Holborn, London. 



"Nature "for 1879, one number missing, and Blackwood's 

 Magazine for 1879 complete, to be exchanged for good micro 

 slides. Insect anatomy prefer. ed. — T. E. Watson, 2 Clifton 

 Place, Newport, Monmouth. 



Will exchange 35 shilling parts of Goldsmith's " Animated 

 Nature," also 40 of Cassell's ''Natural History," now publishing, 

 first volume bound in covers, for eggs, insects, minerals, shells, 

 fossils, marine objects.— W. J. Richards, Hassel Street, New- 

 castle, Staffordshire. 



Sparmania Africana, figured in last year's Science-Gossip. 

 Flowers sent in exchange for any object of microscopic interest. 

 — M. Medhurst, 1 Gladstone Road, Liverpool. 



A few ferns in fructification, stained and mounted transparent, 

 for selected diatoms or pure gatherings. — H. S. Tarrant, Pala- 

 tine Road, Didsbury, near Manchester. 



Wanted, setting-boards from 1 inch to 5$ inches, corked and 

 papered. Must be in good condition, and 14 inches long. Part 

 exchange birds' eggs and cash. — J. M. V., 16 Merrion Square, 

 South Dublin. 



Two vols, of the "Naturalist's Note Book," 1S68-69, cost 6s. 

 each, for Stainton's " Manual of British Butterflies and Moths," 

 or Rye's " British Beetles."— R. McAldowie. 



For slide of carboniferous sponge spicules, very large speci- 

 mens, send slide of recent sponge spicules, spicules or wheels of 

 sea-cucumbers, or spicules of sea-urchins, to J. Smith, 94 Dundas 

 Street, Glasgow. 



For exchange a capital collection of British fossils, also 

 interesting series of rock specimens and some minerals. Wanted, 

 one or two cabinets to hold 1000 or 500 micro-slides each, 

 recent and fossil foraminifera, rock sections, rock cutting, and 

 sediments. — E. Wilson, 18 Low Pavement, Nottingham. 



First-class slides of picked and rare diatoms, in exchange 

 for deposits from He of Tiir (Denmark), Bermuda, and others. 

 Will give quite splendid slides for very rare deposits. — J. Tem- 

 pore, 249 Moss Lane, Manchester. 



I have some beautiful Indian butterflies and beetles, I wish 

 to exchange them for side-blown British birds' eggs, or books on 

 natural history. Newman's " Moths " especially wanted. — R., 

 44 Blenheim Street, Newcastle-on-Tyne. 



Well-mounted diatom deposit exchanged for picked diatoms 

 or pure gatherings.— P. Z., Lilly Villa, Victoria Park, Man- 

 chester. 



Wanted, "Journal of Botany," half price and postage. — 

 W. W. Poole, Mechanics' Institute, Winchester. 



Golden Eagle parasites, also several other species both rare 

 and common, in exchange for British butterflies or offers, — 

 H. J. P., 81 Bridge Street, Manchester. 



First-ci.ass micro material wanted in exchange for well- 

 mounted slides of injected kidney of porpoise, double injected 

 liver, foraminiferous shells, 730 fathoms from St. Vincent 

 Harbour. State offers before sending. — James Simpson, 48 

 Arthur Street, Queen's Park, Edinburgh. 



Slides of platinocyanide of Yttrium, in exchange for well- 

 mounted slide or unmounted object of interest. — D. W. G., 

 9 Mincing Lane, E.C. 



Blue and yellow seienite wanted, exchange red and green 

 selenite or in slides. Stage micrometer and stage forceps to 

 exchange for slides, material, or accessories — E. Clover, 

 Springfield, Sudbury, Suffolk. 



Wanted, euplectella or Venus's flower basket, exchange 

 foreign lepidoptera. — J. Bates. 



Wanted, microscopic accessories, or magic lantern slides, 

 will give in exchange side-blown British birds' eggs, or land and 

 fresh-water shells. — James Ingleby, Eavestone, near Ripon. 



Well-mounted microscopic slides in exchange for small 

 fish, plants, &c, for aquarium. — Thomas Shipton, The Terrace, 

 Chesterfield. 



BOOKS, ETC., RECEIVED. 



"The Story of the Earth and Man." By Dr. Dawson, F.R.S., 

 6th edition. London : Hodder & Stourhton. 



"Chapters from the Physical History of the Earth." By 

 Arthur Nicols, F.G.S. London : C. Kegan Paul & Co. 



" Midland Naturalist." February. 



" Land and Water." February. 



"Journal of Applied Sc ! ence." February. 



"American Naturalist." February. 



"American Journal of Microscopy." February. 



" Boston Journal of Chemistry." February. 



" Feuille des Jeunes Naturalistes." February. 



"Ben Brierley's Journal." February. 

 &c. &c. &c. 



Communications received up to ioth ult. from: — 

 G. C. D.— M. W. N.— G. M.— C. F. W.— T. W.— W. D. E.— 



F. S. L.— C. J. W.— C. W. W.— A. P.— M. M.— F. G.— E. D. 

 —J. A C— W. E— J. S.— W. H.— W. G— R. W.— M. R.— 

 S. H— T. H.— L. C— E. E.— A. J. R. S.-H. T— J. S.— G. H. 

 — W. C H.-W. J. H.— W. G.— J.B.— G. C. G.-V. C— J. F. 

 — B. H.— R. E. L.-B. H.— F. J.— A. G.— A. E. H.— R. L. H. 

 —J. A. F.— G. C— R. H.— H. G. W .— W. B. S.— W. H. N.— 

 A. S.— E. E.-J. R. M.— H. P.— J. S.-S. C. H.— C- J. A. C— 

 H. 1). B— S. T.— E. M. C— T. J. L.— E. E. E.— T. V. D.— 

 W. D. S.— W. S.— E. C. J.-G. T. B.— E. S. W. K.-M. D.— 

 E. W.-J. I.— J. S — D. J. S.— R. A— E. C.-G. H. G.— 

 H. J. M.-F. W. P.— J. T.— R.— W. J. R.— W. W. P.— J. B. 

 —J. W. B.— T. W. D — P. 2.— R. McA.— O. O.— T. G. R. D.— 

 J. M. V.— H. H. S.— A. C. C— R. B. L.-H. T. P.— T. C— 

 J. S.— J. L. H.— H. S.— W. S.— H. M— J. S— D. W. G.— 

 J. B.— J. F. U.— R. H. A.— \V. H. J.— V. G.-J. J.— J. S.— 



G. S. B.— A. H. W.— J. M. W.— E. E. E.— T. S.— T. W. O.— 

 M. M— J. S— J. T. T.— J. N. D. T.— G. E. M.-&c. 



