18 GEOLOGICAL MEMOIES. 



ALG-aE enclosed in Diamonds. By Dr. Goppert. 

 [Abhandl. Schles. Ges. fiir vaterl. Cultur, 1868.] 



Tke author was led by his observations Tipon bodies enclosed in 

 diamonds to conclude that they are of Neptunian origin, and he 

 considers that this opinion is supported by the fact that the primary 

 clay-slate and gneiss in which diamonds are found are now known 

 to contain organic remains. He notices especially Eozoon canadense, 

 the organic particles found by H. Rose in smoky topaz, the Old- 

 hamice of Forbes, and the occurrence of nitrogen and organic mate- 

 rial in many minerals, as demonstrated by Delesse. The author 

 now described a diamond containing dendrites, such as occur in 

 chalcedony, jasper, and other minerals of aqueous origin. Another, 

 weighing 263 milligrms., in the Berlin Museum, contains a quantity 

 of round, uniformly green corpuscles, precisely resembling those of 

 Protococcus jpluvialis in size and form. A third specimen, weighing 

 345 milhgrms., and also belonging to the Berlin Museum, contains a 

 quantity of green corpuscles of a more elongated form, often ad- 

 hering together in the form of a chain. These most closely resemble 

 the living Palmogloea macrococca. The author describes these forms 

 as Algge, under the names of Protococcus adamantinus and Palmo- 

 gloeites adamantinus. (From the Beport of the Imp. Geol. Institute, 

 Vienna., August 31, 1869). 



[W. S. D.] 



The Teias in Spitzbergen. By Dr. G. C. Laube. 



[Proc. Imp. Geol. Institute, Vienna, 31 st July, 1869.] 



Peopessok Noebenskiold has lately brought a great quantity of 

 Triassic fossils from Spitzbergen to Stockholm. The partially bitu- 

 minous shales, to which the author gives the name of " Halohia- 

 shales," present a striking resemblance to the Alpine " Wengen 

 shales;" and above these are strata containing Cephalopods very 

 like those of the St.-Cassian beds. Nautilus NordensTcioldi (Lind- 

 strom) exactly resembles a Nautilus from the Hallstatt limestone. 

 Nautilus trochleoeformis is an Arcestes closely approaching A. cymbi- 

 formis; Ammonites Oaytani is also sm Arcestes, approaching A,Bar- 

 randei (Laube). Ceratites Blomstrandi is exactly like.^. Wengensis 

 (Kip.). Brown strata, supposed by Prof. Nordenskiold to be Jurassic, 

 contain Halohice, and also two small Gasteropods, a Ghemnitzia and 

 a Loxonema, both undoubtedly having the character of St.-Cassian 

 species. Among the specimens sent are fragments of black shales 

 from the Ice-fjord, with numerous impressions of Halohia Lommali 

 (Wissm.), which cannot be distinguished from the true " Wengen 

 shales ; " the fragments from Cape Thordsen, containing Halohia 

 rugosa (Giimb.)=^. Haueri (Stur) and a much compressed Am- 

 monite {A. floridus ?), ' present an equal resemblance to Stur's 

 " Reingraben shales." [Count M.] 



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