556 RADIOLARIA IN PALEOZOIC ROCKS, 



(Tumbell cites them from the 8t. Cassian beds; and Waters has 

 detected tlieir i-emains in the Infra- Lias. 



Radiolaria have been described by Dr. Geo. J. Hinde and Mr. 

 F. L. Ransome* from Angel Island from Mesozoic (1) rocks. 



Radiolaria have been described from Jurassic or older I'ocks in 

 the coast ranges of California by Fairbanks. f 



Radiolaria have been described from Paleozoic rocks Ijy the 

 following : — Shrubsole has I'ecorded them from the Carboniferous 

 rocks of Great Britain. 



Dr. G. J. Hinde; has descriljed radiolaria from the Llandilo- 

 Caradoc rock at Corstorphane, in the S. of Scotland. 



The same author has described radiolaria from Ordovician 

 cherts at MuUion Island, Cornwall, England. § 



Perhaps the most important contribution to our knowledge of 

 the Palaeozoic radiolaria is that of Dr. Riist, || and, as much of it 

 lias an important bearing on the radiolarian rocks of Australia, I 

 take the liberty of making abstracts from it. 



In the 2^hosphorite from the Petschora in the S. Urals occur 

 well preserved radiolaria in the form of deep black flinty shells, 

 in a bright brown translucent base. Flinty material and iron 

 are present in the phosphatic limestone. In cases the I'adiolaria 

 are represented by casts onh'. In the whetstone and adinole 

 radiolaria are badly preserved. 



Radiolaria are beautifully preserved as dark Ijlack shells in a 

 cryptocrystalline quartz groundmass in the L^^dian-stone of 

 Teufelsecke at Lautenthal. 



* The Geology of Augel Island. University of California. Bulletin of 

 the Department of Geology. Vol. i. No. 7, pp. 193-240. Pis. 12-14. 



+ "Stratigraphy of the Californian Coast Ranges" — Journal of Geology, 

 Chicago. Vol. iii., 1895, p. 415. 



% Geol. Mag. New Series. Dec. iii. Vol. vii., 1890, p. 144, and Ann. 

 & Mag. Nat. Hist. Ser. 6, Vol. vi. (1890), p. 40. 



§ Q.J.G.S. Vol. xlix., 1893, pp. 215-220. PI. iv. 



II Pala^ontographia. Vol. x.xxviii., 1891-92. Beitriige zur Kentniss der 

 fossilen Radiolarien aus Gesteiiien der Trias und der Palceozoischen 

 Schichten. Von. Dr. Biist in Hanover. 



