32 Rcvieici—Dr. G. J. Hinde on Fossil Radiohiria. 



i Sphicroidea to the Pre-Cambrian, Siluriau, Devoiiiau, aud Seuouiaa. 

 c \ Pninnidea to the Silurian, Duvouian, Carbouiferous, Permian?, and 



Spumellaiua seuouian. 



\ Discoidea to the Sihirian, Devonian, Permian, and Jurassic. 

 T,,. f Cvrtoidea to the Pre - Cambrian, Devonian, Carboniferous, and 



Nassellauia j • sejionian. 



These results differ somewhat from those given ia this notice of 

 Di'. Hinde's Eadiolarian researches. 



Dr. G. J. Hinde, whose important memoirs descriptive of Eadio- 

 larian rocks from different parts of tlie worhl are enumerated at the 

 head of this article, noticed in 1890 some chert beds, composed 

 mainly of Eadiolaria, from the South Uplands of Scotland (in 

 Lanarkshire and Peebleshire), belonging to an Ordovician formation 

 equivalent to the Llandeilo-Caradoc series of Wales, and in which 

 the late Dr. H. A. ISlcholson had already observed these microzoa. 



In 1893 Dr. Hinde determined two genera of the Order Sphseroidea, 

 and three of Prunoidea, in the chert of Mullion Island off the Lizard 

 Peninsula, Cornwall, and suggested that they may be of the same 

 age as the Ordovician cherts of Scotland. 



In the same year, examining a siliceous rock from Fanny Bay, 

 Port Darwin, Northern Australia, he found one genus of Prunoidea, 

 five genera of Discoidea, and three of Cyrtoidea. 



In 1895 Dr. Hinde found in the cherts of the Lower Culm- 

 measures of Cornwall, Devon, and West Somerset, one genus of 

 Beloidea, eight genera of Sphjeroidea, three of Prunoidea, seven of 

 Discoidea, and four of Cyrtoidea. Of these twenty-three genei'a, 

 " twenty-one have been previously determined from the Paleeozoic 

 formations of this country and the continent"; and of these, seventeen 

 have been determined by Dr. Eiist from the Culm of Germany, Sicil}^, 

 and Eussia. 



In the same year Dr. Hinde examined some Eadiolarian rocks of 

 Devonian age trom New South Wales, namely, siliceous claystones 

 and shales, volcanic tuff, and chert from Tamworth, also jaspery 

 cherts with few and badly preserved Eadiolaria from Bingera, 

 Barraba, and Jenola Caves. Although some associated Corals 

 indicate a Devonian age, the Tamworth Eadiolaria correspond on 

 the whole with those from the Ordovician (Lower Silurian) phos- 

 phorites and siliceous shale of Cabrieres and Languedoc, described 

 by Eiist (" Paljeontographica," vol. xxxviii, 1892), and those of the 

 South Uplands of Scotland, of corresponding age (Hinde, p. 60). 

 The apparent absence of Cyrtoidea distinguishes this from Mesozoic 

 and Tertiary faunae ; the predominating forms being Spheeroidea, 

 with medullary tests and radial spines. The Cj'rtoidea were either 

 not represented or by a small minority in the earlier deposits. 

 The Tamworth Eadiolaria are : — 



Genera. Species. 



Bcioidcd ... ... ... 1 ... ... ... 1 



Sphccroidea 14 28 



I'runoldcii ... ... ... 4 ... ... ... 7 



Discoidea ... ... ... 8 ... ... ... 12 



I'levioidea 2 6 



29 54 



