- US - 



Vol. IV. No. 19. April 1881. — "SV. Terrill: On certain crystallised 

 products , formed in smelting Operations. 133. — Heddle : On the geo- 

 gnosy and mineralogy of Scotland. Sutherland. 135. — H. Carrington 

 Boltox: Action of organic acids on minerals. 181. — Heddle : On sub- 

 stances which may prove to be new minerals. 189. — Ch. 0. Trechmanx: 

 On crystallised olivine from slag. 192. — Reviews etc. 193. 



11) The Ann als and Magazine of natural history. S ö . London 

 5th. series. [Jb. 1881. I. - 159 -] 



Vol. VI. No. 36. Dec. 1SS0. — W. A. Nicholson: On the minute 

 structure of the recent Heteropera neozalanica Besk, and on the Relations 

 of the genus Heteropora to Monticulipora. 414—423. — W. Sollas: On 

 the Flint Nodules of the Trimmingham Chalk. (PL XIX. XX.) 437—461. 



Vol. VII. No. 37. Jan. 1881. — A. Nicholson: On some newer imper- 

 fectly-known Speeles of Corals from the Devonian Rocks of France. (PL I.) 

 14—24. — R. Etheridge jt>\ : Description of certain peculiar Bodies vrhich 

 may be the Opercula of small Gasteropoda, discovered by Mr. James 

 Benxie in the Carboniferous Limestone of Law Quarry, near Dalry. Ayr- 

 ■shire. with notes on some Silurian Opercula. 25 — 31. 



Vol. VII. No. 33. Febr. 1881. — W. J. Sollas: Note on the Occur- 

 rence of Sponge-spicules in Chert from the Carboniferous Limestone of 

 Ireland. 141 — 143. — Wallich: On the Origin and Formation of the Flints 

 of the Upper or White Chalk; with Observation upon Prof. Sollas' 

 Paper in the „Annais and Magazine of Natur. Hist." f. Dec. 1880. (PI. XL) 

 162—204. 



Vol. VII. No. 39. Mar. 1881. — S. H. Sccdder: Relation of Devonian 

 Insects to Later and Existing Types. 255—261. — Wallich: On Siliceous 

 Sponge-growth in the Creataceous Ocean. 261 — 263. 



12) The American Journal of Science and Arts. 3rd Series. 

 [Jb. 1881. I. - 454 -] 



Vol. XXI. No. 123. March 1881. — S. H. Scudder: Structure and affi- 

 nities of Euphoberia of Meek and Worthex. 182. — C. G. Rockwood : 

 Recent American earthquakes. 193. — * G. W. Hawes : Liquid carbon 

 dioxide in smoky quartz. 203. — * A. W. Wright: Gaseous substances 

 contained in the smoky quartz of Branchville. Conn. 209. — W. P. Blake : 

 Occurrence of realgar and orpiment in Utah Territory. 219. 



Vol. XXI. No. 124. April 1881. — Geo. Bird Grixnell: Monograph 

 by Prof. Marsh on the Odontornithes. or Toothed Birds of North America. 

 255. — W. J. McGee: Elements in orographic displacement. 276. — 

 W.E.Hidden: Whitfield County. Georgia. Meteoric Iron 286. — * E. A. Smith: 

 The geology of Florida. 292. — * G. J. Brush: American Sulpho-Selenides 

 of Mercury. 312. — H. S. Williams: Channel-fillings in Upper Devonian 

 shales. 318. — 0. C. Marsh: New order of Extinct Jurassic Reptiles 

 (Coeluria). 339. — Discovery of a fossil Bird in the Jurassic of Wyoming. 

 341. — American Pterodactyls. 342. 



