xxn 



Inhalt. 



Seite 



Wheeler, H. A. : Plattnerite from Idaho 237 



Wheeler, William Henry: Bars at the Mouths of Tidal Estuaries 65 

 Whiteaves, J. F.: The Orthoceratidae of the Trenton Limestone 



of the Winnipeg Basin 179 



— A new speeies of Panenka. 183 



— Paucispiral opercula of Gasteropoda in the Guephformation . . 183 



— Description of four new speeies of fossils from the silurian rocks 



of the southeastern portion of the district of Saskatchewan . 380 

 Whitfield, B. P. : Observations on some cretaeeous fossils from the 

 Beyrut District of Syria, in the Collection of the American Museum 

 of Natural History, with Descriptions of some new Speeies . 537 

 Wiik, F. J : Universitetets i Helsingfors Mineralienkabinett; kort 



skildring af dess fordna och nuvarande tillständ 480 



Williams, George H. : On the possibility of Hemihedrism in the 

 Monoclinic Crystal System, with especial reference to the Hemi- 

 hedrism of Pyroxene 238 



— Notes on some Eruptive Kocks from Alaska , 505 



W T illis, Baley: Graphic Field Notes for Areal Geology .... 99 

 W i n c z a , H. : Ueber ein transitorisches Rudiment einer knöchernen 



Clavicula bei Embryonen eines Ungulaten 541 



W i n s 1 o w , A. : An Illustration of the Flexibility of Limestone . . 290 

 W ol f f , J. E. : Metamorphism of Ciastic Feldspar in Congiomerate Schist 293 

 Woods, H. : Catalogue of the type fossils in the Woodwardian 



Museum, Cambridge, with a preface by T. McKenny Unghes . 146 

 Wo od ward, A. Smith: Evidence of the occurrence of Pterosaurians 



and Plesiosaurians in the Cretaeeous of Brazil , discovered by 



Joseph Mawson 163 



— Evidence of a fossil Tunny from the Coralline Crag . . . . 173 



— On some upper cretaeeous fishes of the family of Aspidorhynchidae 173 



— On some new fishes from the english Wealden and Purbeck 

 beds, referable to the genera Oligopleurus, Strobilodus and Mesodon 174 



— The Devonian Fishfauna of Spitzbergen 177 



— A new Theory of Pterichthys 399 



— Note on some Dermal Plates of Homosteus from the Old Bed 

 Sandstone of Caithness 550 



Woodward, H. B.: Bemarks on the Formation of Landscap-Marble 287 

 Woolman, Lewis : Marine and fresh water Diatoms and Sponge- 



spicules from the Delaware Biver clays of Philadelphia . . . 422 

 Wulff, G. : Eine Methode, die ebenen Winkel mit dem Mikroskop 



zu messen 228 



Wulff, L. : Beiträge zur Krystallstructurtheorie 1 



Yeates, W. S. : Pseudomorphs of Native Copper after Azurite, 



from Grant County, New Mexico 460 



Yokoyama, Matajiro : On some Cretaeeous Fossils from Shikoku . 554 

 Z e i 1 1 e r , B. : Sur la Constitution des epi? de fruetification du 



Sphenophyllum cuneifolium 573 



Zemiatschensky, P. : Die mineralogische Natur und die Ent- 

 stehung des Palygorskit 33 



Z i m ä n y i , Karl : Mineralogische Mittheilungen 253 



Zuber, B. : Estudio geolögico del Cerro de Cacheuta y sus Contornos 103 



IV. Zeitschriften. 



Annalen des k. k. naturhistorischen Hofmuseums. Wien .... 445 



Annales de la Societe geologique de Belgique. Liege 220 



Annales de la Societe geologique du Nord de la France. Lille 448. 586 



