XX 



Seite 



Weedj W. H. : On the Formation of Siliceous Sinter by the Vege- 

 tation of Thermal Springs 94 



— The Diatom marshes and Diatom beds of the Yellowstone Na- 

 tional Park 94 



W e i s s . E. : Beobachtungen an Sigillarien von Wettin und Umgegend 383 

 Weiss. L.: Lehrbuch der Mineralogie und Chemie in zwei Theilen 



für höhere Lehranstalten und zum Selbststudium 227 



Wells j Horace J. : Sperrylite, a new Mineral 246 



— Sperrylith. ein neues Mineral 246 



Welsch: Sur un ilöt de terrain eristallophyllien , X. du Chenoua, 



Algerie 298 



— Dicouverte du Jurassique moyen (Dogger) sur les hauts plateaux 

 d'Oran .441 



— Les terrains cretaces du Seressou occidental et de Lehou, departe- 

 nient d'Oran, Algerie 443 



— Sur les differentes etages pliocenes des environs cVAlger . . . 445 

 WenjukoWj P. : Sur les profondeurs de la Her Xoire 448 



— Etüde sur la faune du Calcaü'e earbonifere interieur de la region 



du Bardoun, en Mongolie 462 



W hit ake r 3 W. : Sites for Coal-search in the Soutk-east of Eng- 

 land 121 



Whiteaves, J. F.: The fossils of the Triassic Kocks of British 



Columbia 170 



Whitfield, J. E. : A new meteorite from Mexico 418 



Wiik. F. J. : Die finnischen Mineralien in der Sammlung der Uni- 

 versität Helsingfors . . . . ■ 250 



"Williams. Gr. H. : The Xon-Feldspathic Intrusive Eocks of Mary- 

 land and the Course of their Alteration. 1. Paper: The Ori- 

 ginal Rocks 92 



— Elements of Ciy>tallography for students of Chemistry . Physics 



and Mineralogy 402 



Wilson. E. and W. D. Crick: The Lias Marlstone of Tilton. Lei- 



cestershire. With Palaeontological Xotes by E. Wilson . . . 320 

 Wolff. H. : Beiträge zur chemischen Kenntniss der basaltischen Ge- 

 steine des Knüllgebiets 278 



Wollemann, A.: Leber die Diluvialsteppe 332 



W o o d w a r d . A. Smith : On the Fossil Fish-spines named Coelo- 



rhynchus Agassiz •. 455 



— Preliniinary Notes on some Xew and little-known British Juras- 



sic Fishes . . . 455 



— On Atherstonia , a new Genus of Palaeoniscid Fishes from the 

 Karroo Formation of South Africa ; and on a Tooth of Ceratodus 

 from the Stormberg Beds of the Orange Free State 455 



— Note on the Occurrence of a Species of Onychodus in the Lower 



Old Red Sandstone Passage Beds of Ledbury. Herefordshire . . 456 



— On the Occurrence of the Devonian Genus Onychodus in Spitz- 

 bergen 456 



— Palaeichthyological Xotes ... 456 



— On the Tooth of a Carboniferous Dipnoan Fish : Ctenodus inter- 

 ruptus 457 



— On two Croups of Teeth of the Cretaceous Selachian Fish 

 Ptychodus 457 



— On Sclerorhynchus atavus 457 



— Xote on Rhinobatus Bugesiacus — a Selachian Fish from the 

 Lithographie Stone 457 



Wülfing'. E. A. : Leber einen Apparat zur Herstellung von Kry- 



stallschlirfen in orientirter Lage 401 



