430 Reviews — Radiolaria from Triassic Rocks. 



shows that the Radiolaria examined belong to five orders, referable to 

 28 genera and 83 species, viz. — 



Name of Order. No. 

 Beloidea 



SpHiEROIDEA ... 



PRfNOIDEA 



DiSCOIDEA ... 



Cyrtoidea 



28 83 



Of the 83 species described 74 are new, and not more than 9 are 

 known already from other areas. A significant feature is the large 

 proportion of species, nearly three-fourths of the whole, belonging 

 to the Ctrtoidea. 



The Radiolarian rocks in situ on the islands of Rote and Savu have 

 yielded the greater number of the species described. From Rote 

 41 species were recognised altogether; 35 of these are not known 

 elsewhere, and 6 are common to other localities. Most of these 

 forms are from cherty or mainly siliceous rocks, but in the ITalohia 

 limestone of Baii 10 species of Cyrtoidea "were met with, which 

 appear to be restricted to this rock and locality. From Savu 

 33 species are described, 24 of which are limited to this island and 



9 occur in other islands. 



From the rolled and travelled cherty fragments from Ceram 



10 species of Radiolaria were found, only 20 of which belong 

 exclusively to that island, and 8 are common to other islands. Also 

 in Celebes, out of 13 species found in pebbles of chert, 8 have not 

 been met with elsewhere, whilst 5 occur in other areas. The number 

 of species in these detached pieces of rocks, which are also present 

 in the Radiolarian deposits of Rote and Savu, gives support to the 

 view that the original rocks on Ceram and Celebes, from which they 

 were derived, are of the same Triassic age as those of Rote and Savu. 

 Only one species of Radiolaria was recognised in the HaJohia limestone 

 of Timor, whilst those of Baru are so badly preserved that no species 

 could be determined. No Radiolaria were met with in Mangoli. 



The 44 pages of descriptive letterpress, accompanied by 6 plates, 

 comprising 80 well-executed figures of the species determined from 

 these East Indian Islands, makes another valuable contribution by 

 Dr. G. J. Hinde to our knowledge of the fossil Radiolarian fauna 

 of the Dutch East Indies, the geology of which has been so ably 

 investigated by Dr. Verbeek and later by Dr. G. A. F. Molengraaff, to 

 ■which also earlier contributions, in various branches of Palaeozoology, 

 will be found in the past volumes of the Geological Magazine.' 



• K. D. Verbeek, "The Geolog)- of Central Sumatra": Geol. Mag., 1875, 

 pp. 477-86 ; 1877, p. 443 ; 1880, p. 286. H. B. Brady : " Fossil Foraminifera 

 from the "West-Coast District, Sumatra," 1875, pp. 532-9, Pis. XIII and XIV. 

 Dr. A. Giinther: "Fish Fauna of the Tertiary Deposits of Sumatra," 1876, 

 pp. 433-40, Pis. XV-XIX. Henry Woodward: "Fossil Shells, Corals, etc., 

 Sumatra," 1879, pp. 385, 441, 492, 535, Pis. X-XV. Dr. G. A. F. Molengraaff : 

 " Geol. Expl. Central Borneo, 1893-94 " (Review) : Geol. Mag., 1903, pp. 167-73, 

 and Appendix by Dr. G. J. Hinde, " Fossil Radiolaria of Central Borneo," 1903, 

 pp. 172, 173. 



